CA2623132A1 - Cementitous compositions containing slag and feldspar and method of making said composition - Google Patents
Cementitous compositions containing slag and feldspar and method of making said composition Download PDFInfo
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- CA2623132A1 CA2623132A1 CA002623132A CA2623132A CA2623132A1 CA 2623132 A1 CA2623132 A1 CA 2623132A1 CA 002623132 A CA002623132 A CA 002623132A CA 2623132 A CA2623132 A CA 2623132A CA 2623132 A1 CA2623132 A1 CA 2623132A1
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- cementitious composition
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
A method of making a cementitious composition comprises (a) selecting and grinding at least one slag material to a fineness of at least 4000 Blaine; (b) selecting at least one feldspar material and grinding it to a fineness of at least 4000 Blaine; (c) mixing calcium oxide and gypsum; (d) mixing the ground feldspar material with the calcium oxide-gypsum mixture to produce an activator; (e) conditioning the ground slag material by mixing in gradual additions of an aqueous solution; (f) adding the activator to the conditioned ground slag material and stirring the mixture to produce a slurry; and (g) curing the slurry in a sealed container. A cementitious composition of the invention comprises a ground slag material, a ground feldspar material, calcium oxide and gypsum, and uses readily available materials, as an economic replacement for Portland cement, fly ash or other materials in backfilling or stabilizing mine sites.
Description
Cementitous Compositions Containing Slag and Feldspar and Method of Making said Composition FieId of Invention The present invention relates to a ceznentitious composition and a method of making the composition from, a slag material activated by a feldspar material, the feldspar material replaci.ng the use of Portland cement or other materials to produce backfill material for underground mine workings and for the stabilization or solidification of mine wastes.
Background At mining sites, for safety and other reasons, it is frequently necessary to conduct backfilling operations, or to stabilize or solidify mine wastes at the surface.
Conventionally, Portland cement is used for this purpose; however, having regard to the high cost of this material, and of shipping it to the intended use site, this represents a major cost in mining operations throughout the world, and in Canada in partxcular. Any reduction in the amount of Portland cement required would lower the operating costs of a mime aud contribute to the profitability of the minixlg operation.
A ymatenal that has recently been considered as having the potentiaa for reducing the amoutt of Portland cement used in mining operations is slag, and in particular non-ferrous granulated slag, which is a readily available waste product of the smelting of copper and nickel concentrates.
However, in order to use any material to replace Portland cement, it is necessary that the cementing (pozzalonic) properties be substantially equivalent to those of Portland cement. Althaugh many forms of slag contain suitable constituents, it is difficult to activate the cementing properties of the slag.
Activatzon of the pozzalonic properties of a non-ferrous granulated slag requires the addition of cementing supplements as an activator, to provide the calcium, sulphur and aluminum needed to grow the cementitious mineral ettringite. Ettringite has the composition Ca6Al2(SO4)3(OH)12 x 26Tq20 and is the first binder to form in a cement. To form ettringite, conventionally calcium is supplied by quick lime, sulphur by gypsum and aluminum by supplements such as fly ash and a calcium aluminate slag obtained from the recycling of spent catalysts.
12320P0117C,A
Currently, using conventional methods, there are three approaches to activating non-ferrous granulated slag. The first method is to add the cementing supplements at the smelter just prior to granulation, as disclosed by Philip et al. in US 4,756,761 and R.J. Atkinson et al. (1989, Using Smelter Slag in Mine Backfill, Minip_g,Magazin.e, Vol. 160, No. 8, pp. 118-123). The second method is to blend the n.ou-fetxov.s granulated slag with Portland celaae,nt as disclosed by Krofchak in US 6,033,467; however, this method suffers from the disadvantage noted above, associated with the use of Pordat-d cement as the activator. The third method is to add one or more cementing supplement during mixing with the aggregate material.
For the third method, it is known to use a composition containin.g fly ash waste as its main ingredient. Fly ash waste is available as a by-product from the combustion of coal in thermal power plants. However there are a number of drawbacks to using fly ash as an activator, including issues of quality, transportation and availability. The pozzalonic properties of fly ash vary according to the type of coal from which it was created, which creates a serious problem of inconsistency and unreliability of performance. In some instances, the fly ash does not provide suffcient amounts of aluminum for ettringite nucleation and growth. Fly ash is not l.ocs.lly aNaailable at most of the non-ferrous smelters and miujng operations, particularly in Canada, and therefore must be sbatpped at considerable expense, It is also known to use calcium aluminate to supply aluminum for ettringite nucleation and growth.
However, there are very limited sources for the compound, and transportation costs of shipping it to the intended use site may be prohibitively high, or at least significantly increase operating costs.
Therefore, what is needed is a novel, readily available and affordable activator for activating slag to form a cem,entitzous composition which can be used to replace Portland cement in the baclz~'illing of uztderground mine worlangs and the stabilization and solidification of mine wastes, which does not suffer from the disadvantages of the known compositions, including those noted above.
It has now been found that feldspar materials can be used as an effective and affordable activator of many types of slag, including ferrous and non-ferrous slags, in granulated or other form.
Background At mining sites, for safety and other reasons, it is frequently necessary to conduct backfilling operations, or to stabilize or solidify mine wastes at the surface.
Conventionally, Portland cement is used for this purpose; however, having regard to the high cost of this material, and of shipping it to the intended use site, this represents a major cost in mining operations throughout the world, and in Canada in partxcular. Any reduction in the amount of Portland cement required would lower the operating costs of a mime aud contribute to the profitability of the minixlg operation.
A ymatenal that has recently been considered as having the potentiaa for reducing the amoutt of Portland cement used in mining operations is slag, and in particular non-ferrous granulated slag, which is a readily available waste product of the smelting of copper and nickel concentrates.
However, in order to use any material to replace Portland cement, it is necessary that the cementing (pozzalonic) properties be substantially equivalent to those of Portland cement. Althaugh many forms of slag contain suitable constituents, it is difficult to activate the cementing properties of the slag.
Activatzon of the pozzalonic properties of a non-ferrous granulated slag requires the addition of cementing supplements as an activator, to provide the calcium, sulphur and aluminum needed to grow the cementitious mineral ettringite. Ettringite has the composition Ca6Al2(SO4)3(OH)12 x 26Tq20 and is the first binder to form in a cement. To form ettringite, conventionally calcium is supplied by quick lime, sulphur by gypsum and aluminum by supplements such as fly ash and a calcium aluminate slag obtained from the recycling of spent catalysts.
12320P0117C,A
Currently, using conventional methods, there are three approaches to activating non-ferrous granulated slag. The first method is to add the cementing supplements at the smelter just prior to granulation, as disclosed by Philip et al. in US 4,756,761 and R.J. Atkinson et al. (1989, Using Smelter Slag in Mine Backfill, Minip_g,Magazin.e, Vol. 160, No. 8, pp. 118-123). The second method is to blend the n.ou-fetxov.s granulated slag with Portland celaae,nt as disclosed by Krofchak in US 6,033,467; however, this method suffers from the disadvantage noted above, associated with the use of Pordat-d cement as the activator. The third method is to add one or more cementing supplement during mixing with the aggregate material.
For the third method, it is known to use a composition containin.g fly ash waste as its main ingredient. Fly ash waste is available as a by-product from the combustion of coal in thermal power plants. However there are a number of drawbacks to using fly ash as an activator, including issues of quality, transportation and availability. The pozzalonic properties of fly ash vary according to the type of coal from which it was created, which creates a serious problem of inconsistency and unreliability of performance. In some instances, the fly ash does not provide suffcient amounts of aluminum for ettringite nucleation and growth. Fly ash is not l.ocs.lly aNaailable at most of the non-ferrous smelters and miujng operations, particularly in Canada, and therefore must be sbatpped at considerable expense, It is also known to use calcium aluminate to supply aluminum for ettringite nucleation and growth.
However, there are very limited sources for the compound, and transportation costs of shipping it to the intended use site may be prohibitively high, or at least significantly increase operating costs.
Therefore, what is needed is a novel, readily available and affordable activator for activating slag to form a cem,entitzous composition which can be used to replace Portland cement in the baclz~'illing of uztderground mine worlangs and the stabilization and solidification of mine wastes, which does not suffer from the disadvantages of the known compositions, including those noted above.
It has now been found that feldspar materials can be used as an effective and affordable activator of many types of slag, including ferrous and non-ferrous slags, in granulated or other form.
2 Summary of the Invention The invention seeks to provide a cementitious composition and a method of making the composition from a slag material activated by a feldspar, the slag material replacing the use of Portland cement in the backfilling of underground mine workings and the stabilizatxon/solidification of mine wastes.
Feldspars are a group of rock-forming minerals which make up a large proporti.on of the Eart,h's cnzst. Feldspars are made up of two principal raaimeral series, the alkali feldspars and the plagioclase feldspars. The distinction between the alkali aiid plagioclase feldspars is complicated by the phenomena of solid solution. The alkali feldspars are monoclinic or triclinic crystals that have more potassium than calcium. The plagioclase feldspars are triclinic with less potassium than calcium or sodium. Plagioclase feldspars are made up of a continuous series of sodium-aluminum and calcium-aluminum silicates. The sodium endmember in plagioclase feldspars is albite and the calcium endmember is anorthite. The intervening members are oligoclase, andesine, labradorite, and bytownite, of which the most commonly occurring are albite, and labradorite.
Plagioclase feldspars are found in virtually all of the igneous and metamorphic rocks that are associated with copper-nickel mining/smelting operations in Canada, and elsewhere in the world.
Alkali feldspars are dominated by the oxthoci,ase mineral series and the micxocline mineral series.
The orthoclase series has nzonoclinic crystals and the microcline series has tr;iclinic czystals, Alkali feldspars are very common rninerals and are found in the country rocks such as granite or pegnaatxtes in or near mining/smelting operations in Canada and elsewhere in the world.
The plagioclase and alkaline feldspars are a good source of silicon and the aluminum needed for ettringite nucleation and growth. The use of calcium compounds, such as calcium oxide, increases the pH of the feldspar to the alkalinity level required for activating the feldspar's aluminum content.
The use of feldspars to activate slag materials has a number of advarLtages over current methods of actitvatxon. Plagioclase feldspars are readily available to the extent that they naturally occur in close vicinity to mining and smelting operations and therefore avoid the need for expensive and time consuming long distance transport to a mine site. Additionally, feldspars do not have the known disadvantages of Portland cement (expense) or fly ash (variable constituents and variable pozzalonic properties, unreliable supply, transport costs).
Feldspars are a group of rock-forming minerals which make up a large proporti.on of the Eart,h's cnzst. Feldspars are made up of two principal raaimeral series, the alkali feldspars and the plagioclase feldspars. The distinction between the alkali aiid plagioclase feldspars is complicated by the phenomena of solid solution. The alkali feldspars are monoclinic or triclinic crystals that have more potassium than calcium. The plagioclase feldspars are triclinic with less potassium than calcium or sodium. Plagioclase feldspars are made up of a continuous series of sodium-aluminum and calcium-aluminum silicates. The sodium endmember in plagioclase feldspars is albite and the calcium endmember is anorthite. The intervening members are oligoclase, andesine, labradorite, and bytownite, of which the most commonly occurring are albite, and labradorite.
Plagioclase feldspars are found in virtually all of the igneous and metamorphic rocks that are associated with copper-nickel mining/smelting operations in Canada, and elsewhere in the world.
Alkali feldspars are dominated by the oxthoci,ase mineral series and the micxocline mineral series.
The orthoclase series has nzonoclinic crystals and the microcline series has tr;iclinic czystals, Alkali feldspars are very common rninerals and are found in the country rocks such as granite or pegnaatxtes in or near mining/smelting operations in Canada and elsewhere in the world.
The plagioclase and alkaline feldspars are a good source of silicon and the aluminum needed for ettringite nucleation and growth. The use of calcium compounds, such as calcium oxide, increases the pH of the feldspar to the alkalinity level required for activating the feldspar's aluminum content.
The use of feldspars to activate slag materials has a number of advarLtages over current methods of actitvatxon. Plagioclase feldspars are readily available to the extent that they naturally occur in close vicinity to mining and smelting operations and therefore avoid the need for expensive and time consuming long distance transport to a mine site. Additionally, feldspars do not have the known disadvantages of Portland cement (expense) or fly ash (variable constituents and variable pozzalonic properties, unreliable supply, transport costs).
3 12320P0117C.A, It has been found that the use of feldspars, including alkali feldspars, in particular microcline, and each of the plagioclase feldspars, as pozaalonic activators provides iesults which are consistent and improved over the use of fly ash, with the added advantages that these materials are readily available, generally in close proximity to the intended use site, and are significantly more economical than the known materials, and at the same time provide direct and indirect environmental benefits.
According to a first broad aspect, the in=ventiorz seeks to provide a method of making a cementitious composxtxon comprising the steps of:
(a) selectuzg and grindi.ng at least one slag material to a fineness of at least 4000 Blaine;
(b) selecting at least one feldspar material and grinding it to a fmeness of at least 4000 Blaine;
(c) mixing calcium oxide and gypsum;
(d) mixing the ground material of step (b) with the mixture of step (c) to produce an activator mixture;
(e) conditioning the ground material of step (a) by mWn.g in gxadual additions of an aqueous solution;
(t) adding the activator of step (d) to the conditioned product of step (e) and stirring the mixture to produce a slurry; and (g) curing the slurry of step (f) in a sealed container.
The slag material can comprise at least one granulated slag material, at least one non-granulated slag material resulting from an air cooling process, or combinations of granulated and non-granulated materials.
Preferably, the aqueous solution is a lime saturated solution, and the slag material can be non-ferxous or ferrous. -The feldspar material can be at least one of a plagioclase feldspar and an alkali feldspar, or combinations; preferably, the plagioclase feldspar is selected from albite, oligoclase, andesine, labradorite, anorthite and combinations thereof, and the alkali feldspar is preferably microcline.
According to a first broad aspect, the in=ventiorz seeks to provide a method of making a cementitious composxtxon comprising the steps of:
(a) selectuzg and grindi.ng at least one slag material to a fineness of at least 4000 Blaine;
(b) selecting at least one feldspar material and grinding it to a fmeness of at least 4000 Blaine;
(c) mixing calcium oxide and gypsum;
(d) mixing the ground material of step (b) with the mixture of step (c) to produce an activator mixture;
(e) conditioning the ground material of step (a) by mWn.g in gxadual additions of an aqueous solution;
(t) adding the activator of step (d) to the conditioned product of step (e) and stirring the mixture to produce a slurry; and (g) curing the slurry of step (f) in a sealed container.
The slag material can comprise at least one granulated slag material, at least one non-granulated slag material resulting from an air cooling process, or combinations of granulated and non-granulated materials.
Preferably, the aqueous solution is a lime saturated solution, and the slag material can be non-ferxous or ferrous. -The feldspar material can be at least one of a plagioclase feldspar and an alkali feldspar, or combinations; preferably, the plagioclase feldspar is selected from albite, oligoclase, andesine, labradorite, anorthite and combinations thereof, and the alkali feldspar is preferably microcline.
4 Preferably the conditioning is performed over a period of between thjrty rnimutes and twenty-fow hours, and the aqueous solution is added over a period of between thirty minutes and twenty-four hours at a temperature in a range between 20 C and 50 C.
Preferably, the step of adding the activator is performed over a period of between thirty minutes and six hours at a temperature in a range between 20 C and 50 C.
Preferably, the step of curing the slurry is perforxned over a period of at least 28 days.
According to a second broad aspect, the invention seeks to pxovxde a ceznentitious composition comprising a ground slag material, a ground feldspar material, calcium oxide and gypsum.
Preferably, the cementitious composition further comprises an aqueous solution; more preferably, the aqueous solution is a lime saturated solution, and the slag material can be non-ferrous or ferrous.
The slag material can comprise at least one granulated slag material, at least one non-granulated slag material resulting from an air cooling process, or combinations of granulated and non-granulated materials.
The feldspar material can be at least one of a plagioclase feldspar and an alkabi feldspar, or combinations; preferably, the plagioclase feldspar is selected from albite, oligoclase, andesine l.abzadorite, anorthite and combinations thereof, and the alkali feldspar is preferably ms.crocline.
According to a third broad aspect, the invention seeks to provide a cementitious composition prepared by the method of the invention.
Detailed Description of the Invention Tn its broadest aspect, the inventive method of m:aking a cementitious composition from a slag material activated by a feldspar comprises the following steps.
First, a suitable available slag material is selected and ground to a fineness of at least 4000 Bl,ain.e.
As noted above, the slag material can be granulated or non-granulated, for example resulting from an air cooling process, or combinations of granulated and non-granulated materials. The slag material may be a non-ferrous slag material or at least one ferrous slag material.
At least one feldspar material is then selected and ground to a fineness of at least 4000 Blaine. The feldspar zuaterial is preferably at least one of a plagiocXase feldspar and an alkali feldspar. The plagi.ocXase feldspar is preferably albite, oligoclase, andesiuae, labradorite, anorthite and combinations thereof. The alkalki feldspar is preferably microcline.
The activator mixture is prepared by mixing calcium oxide and gypsum together, and mMing in the ground feldspar; in this activator mixtUre, the calcium oxide provides the calcium and the gypsum provides the sulphur needed, with the aluminum from the ground feldspar, for ettringi~te nucleation and growth.
The ground slag material is then,condztxoned by gradual additions of au, aqueous solution. It has been found that a lime sa.turated solution is particularly efectxve for the aqueous solution. The cond'ttioning is preferably perfoxmed over a period of between thirty minutes and twenty-four hours, the aqueous solution being added over a period of between four and twenty-four hours at a temperature in a range between 20 C and 50 C.
The activator mixture is then added to the conditioned ground material and the ensuing mixture is stirred to produce a slurry. This step is preferably performed over a period of between thirty minutes and six hours at a temperature in a range between 20 C and 501 C.
Thereafter, the slurry can be cured by knowxx methods, and thereafter can be subjected to testiuag by knovvn methods, and utilized for its inteiaded end use at the mine siite, either in backlling; or ixx stabilizing or solidifying mine wastes, in the same manner as the cementitious materials of the prior art.
Preferably, the step of adding the activator is performed over a period of between thirty minutes and six hours at a temperature in a range between 20 C and 50 C.
Preferably, the step of curing the slurry is perforxned over a period of at least 28 days.
According to a second broad aspect, the invention seeks to pxovxde a ceznentitious composition comprising a ground slag material, a ground feldspar material, calcium oxide and gypsum.
Preferably, the cementitious composition further comprises an aqueous solution; more preferably, the aqueous solution is a lime saturated solution, and the slag material can be non-ferrous or ferrous.
The slag material can comprise at least one granulated slag material, at least one non-granulated slag material resulting from an air cooling process, or combinations of granulated and non-granulated materials.
The feldspar material can be at least one of a plagioclase feldspar and an alkabi feldspar, or combinations; preferably, the plagioclase feldspar is selected from albite, oligoclase, andesine l.abzadorite, anorthite and combinations thereof, and the alkali feldspar is preferably ms.crocline.
According to a third broad aspect, the invention seeks to provide a cementitious composition prepared by the method of the invention.
Detailed Description of the Invention Tn its broadest aspect, the inventive method of m:aking a cementitious composition from a slag material activated by a feldspar comprises the following steps.
First, a suitable available slag material is selected and ground to a fineness of at least 4000 Bl,ain.e.
As noted above, the slag material can be granulated or non-granulated, for example resulting from an air cooling process, or combinations of granulated and non-granulated materials. The slag material may be a non-ferrous slag material or at least one ferrous slag material.
At least one feldspar material is then selected and ground to a fineness of at least 4000 Blaine. The feldspar zuaterial is preferably at least one of a plagiocXase feldspar and an alkali feldspar. The plagi.ocXase feldspar is preferably albite, oligoclase, andesiuae, labradorite, anorthite and combinations thereof. The alkalki feldspar is preferably microcline.
The activator mixture is prepared by mixing calcium oxide and gypsum together, and mMing in the ground feldspar; in this activator mixtUre, the calcium oxide provides the calcium and the gypsum provides the sulphur needed, with the aluminum from the ground feldspar, for ettringi~te nucleation and growth.
The ground slag material is then,condztxoned by gradual additions of au, aqueous solution. It has been found that a lime sa.turated solution is particularly efectxve for the aqueous solution. The cond'ttioning is preferably perfoxmed over a period of between thirty minutes and twenty-four hours, the aqueous solution being added over a period of between four and twenty-four hours at a temperature in a range between 20 C and 50 C.
The activator mixture is then added to the conditioned ground material and the ensuing mixture is stirred to produce a slurry. This step is preferably performed over a period of between thirty minutes and six hours at a temperature in a range between 20 C and 501 C.
Thereafter, the slurry can be cured by knowxx methods, and thereafter can be subjected to testiuag by knovvn methods, and utilized for its inteiaded end use at the mine siite, either in backlling; or ixx stabilizing or solidifying mine wastes, in the same manner as the cementitious materials of the prior art.
Claims (21)
1. A method of making a cementitious composition comprising the steps of:
(a) selecting and grinding at least one slag material to a fineness of at least 4000 Blaine;
(b) selecting at least one feldspar material and grinding it to a fineness of at least 4000 Blaine;
(c) mixing calcium oxide and gypsum;
(d) mixing the ground material of step (b) with the mixture of step (c) to produce an activator mixture;
(e) conditioning the ground material of step (a) by mixing in gradual additions of an aqueous solution;
(f) adding the activator of step (d) to the conditioned product of step (e) and stirring the mixture to produce a slurry; and (g) curing the slurry of step (f) in a sealed container.
(a) selecting and grinding at least one slag material to a fineness of at least 4000 Blaine;
(b) selecting at least one feldspar material and grinding it to a fineness of at least 4000 Blaine;
(c) mixing calcium oxide and gypsum;
(d) mixing the ground material of step (b) with the mixture of step (c) to produce an activator mixture;
(e) conditioning the ground material of step (a) by mixing in gradual additions of an aqueous solution;
(f) adding the activator of step (d) to the conditioned product of step (e) and stirring the mixture to produce a slurry; and (g) curing the slurry of step (f) in a sealed container.
2. A method of making a cementitious composition according to Claim 1, wherein the selecting in step (a) comprises selecting from at least one granulated slag material, at least one slag material resulting from an air cooling process and combinations thereof.
3. A method of making a cementitious composition according to Claim 1 or Claim 2, wherein the aqueous solution is a lime saturated solution.
4. A method of making a cementitious composition according to Claim 1, wherein the selecting in step (b) comprises selecting at least one of a plagioclase feldspar and an alkali feldspar.
5. A method of making a cementitious composition according to Claim 4, wherein the selecting in step (b) comprises selecting at least one plagioclase feldspar material from albite, oligoclase, andesine, labradorite, anorthite and combinations thereof.
6. A method of making a cementitious composition according to Claim 4 or Claim 5, wherein the alkali feldspar is microcline.
7. A method of making a cementitious composition according to any one of Claims 1 to 6, wherein the selecting in step (a) comprises selecting a non-ferrous slag material.
8. A method of making a cementitious composition according to any one of Claims 1 to 6, wherein the selecting in step (a) comprises selecting at least one ferrous slag material.
9. A method of making a cementitious composition according to Claim 1, wherein the conditioning of step (e) is performed over a period of between thirty minutes and twenty-four hours, and the aqueous solution is a lime saturated solution and is added over a period of between four and twenty-four hours at a temperature in a range between 20° C and 50° C.
10. A method of making a cementitious composition according to Claim 1, wherein step (f) is performed over a period of between thirty minutes and six hours at a temperature in a range between 20° C and 50° C.
11. A method of making a cementitious composition according to Claim 1, wherein step (g) is performed over a period of at least 28 days.
12. A cementitious composition comprising a ground slag material, a ground feldspar material, calcium oxide and gypsum.
13. A cementitious composition according to Claim 12, further comprising an aqueous solution.
14. A cementitious composition according to Claim 13, wherein the aqueous solution is a lime saturated solution.
15. A cementitious composition according to any one of Claims 12 to 14, wherein the ground slag material is selected from the group consisting of at least one granulated slag, at least one slag material resulting from an air cooling process, and combinations thereof.
16. A cementitious composition according to any one of Claims 12 to 15, wherein the ground feldspar material is selected from the group consisting of at least one of a plagioclase feldspar and an alkali feldspar.
17. A cementitious composition according to Claim 16, wherein the plagioclase feldspar is selected from the group consisting of albite, oligoclase, andesine, labradorite, anorthite and combinations thereof.
18. A cementitous composition according to Claim 16 or 17, wherein the alkali feldspar is microcline.
19. A cementitous composition according to any one of Claims 12 to 18, wherein the ground slag material is a non-ferrous slag material.
20. A cementitious composition according to any one of Claims 12 to 18, wherein the ground slag material is a ferrous slag material.
21. A cementitious composition prepared by the method of any one of Claims 1 to 11.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002623132A CA2623132A1 (en) | 2008-02-29 | 2008-02-29 | Cementitous compositions containing slag and feldspar and method of making said composition |
| US12/919,856 US8066813B2 (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
| CA2715648A CA2715648C (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
| EP09714827.4A EP2257505B1 (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
| AU2009219061A AU2009219061B2 (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
| PCT/CA2009/000216 WO2009105872A1 (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
| CL2009000446A CL2009000446A1 (en) | 2008-02-29 | 2009-02-27 | Method to prepare cement composition comprising a) selecting pozzolanic particulate material, b) feldspar material and grinding, c) mixing lime compound with gypsum, d) mixing material from step b) and c), e) conditioning a) with solution aqueous, f) forming a suspension by mixing d) and e) and g) curing; and cement composition. |
| ZA2010/05938A ZA201005938B (en) | 2008-02-29 | 2010-08-19 | "cementitious compositions containing feldspar and pozzolanic particulate material,and method of making said composition" |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002623132A CA2623132A1 (en) | 2008-02-29 | 2008-02-29 | Cementitous compositions containing slag and feldspar and method of making said composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2623132A1 true CA2623132A1 (en) | 2009-08-29 |
Family
ID=41010637
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002623132A Abandoned CA2623132A1 (en) | 2008-02-29 | 2008-02-29 | Cementitous compositions containing slag and feldspar and method of making said composition |
| CA2715648A Active CA2715648C (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2715648A Active CA2715648C (en) | 2008-02-29 | 2009-02-24 | Cementitious compositions containing feldspar and pozzolanic particulate material, and method of making said composition |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8066813B2 (en) |
| EP (1) | EP2257505B1 (en) |
| AU (1) | AU2009219061B2 (en) |
| CA (2) | CA2623132A1 (en) |
| CL (1) | CL2009000446A1 (en) |
| WO (1) | WO2009105872A1 (en) |
| ZA (1) | ZA201005938B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114988831A (en) * | 2022-05-18 | 2022-09-02 | 北京华晟创元环境科技有限公司 | Filling material prepared from tailing slurry, and preparation and application methods thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173708A (en) * | 2011-02-10 | 2011-09-07 | 乌鲁木齐市建筑建材科学研究院有限责任公司 | Aggregate-free cement-based grouting material |
| CN102351447B (en) * | 2011-07-02 | 2013-01-02 | 河海大学 | Processing method for improving setting performance of desulfurized gypsum |
| US10759697B1 (en) | 2019-06-11 | 2020-09-01 | MSB Global, Inc. | Curable formulations for structural and non-structural applications |
| MX2022001785A (en) | 2019-08-13 | 2022-06-08 | California Inst Of Techn | Process to make calcium oxide or ordinary portland cement from calcium bearing rocks and minerals. |
| CN112777975B (en) * | 2020-12-31 | 2022-12-13 | 乌兰浩特市圣益商砼有限公司 | Ultrahigh-performance concrete prepared from modified volcanic ash rock powder |
| CN113860320B (en) * | 2021-09-18 | 2024-02-27 | 中国科学院地球化学研究所 | Method for synthesizing aqueous plagioclase solid solution at high temperature and high pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148459A (en) * | 1984-08-13 | 1986-03-10 | 日本磁力選鉱株式会社 | Use of steel slag |
| US4756761A (en) | 1986-06-16 | 1988-07-12 | O'okiep Copper Company Ltd. | Methods of making cementitious compositions from waste products |
| ATE75710T1 (en) | 1987-11-19 | 1992-05-15 | Newmont Mining Corp | PROCESS FOR PRODUCTION OF CEMENT-LIKE COMPOSITIONS FROM WASTE. |
| JPH02302346A (en) | 1989-05-15 | 1990-12-14 | Mitsubishi Materials Corp | Hydraulic inorganic binder |
| CA2131906A1 (en) | 1991-03-29 | 1992-10-15 | Raymond S. Chase | Silica-containing cement and concrete composition |
| KR930002270A (en) | 1991-07-05 | 1993-02-22 | 에스. 리들 미첼 | FLY ASH compositions and methods for making articles therefrom |
| US5366548A (en) | 1991-07-05 | 1994-11-22 | Riddle Mitchell S | Volcanic fly ash and kiln dust compositions, and a process for making articles therefrom |
| US5379840A (en) | 1993-08-19 | 1995-01-10 | Shell Oil Company | High temperature well cementing with low grade blast furnace slag |
| US5435843A (en) | 1993-09-10 | 1995-07-25 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Alkali activated class C fly ash cement |
| US6033467A (en) | 1995-06-26 | 2000-03-07 | Fenicem Minerals Inc. | Method of making cement or mine backfill from base metal smelter slag |
| US6406535B1 (en) * | 1999-04-16 | 2002-06-18 | Takachiho Corp. | Material for constructional finished wallboard |
| AT409860B (en) | 2001-02-06 | 2002-12-27 | Tribovent Verfahrensentwicklg | METHOD FOR PRODUCING A ADMINISTER FOR MIXING CEMENTS AND DEVICE FOR CARRYING OUT THIS METHOD |
| KR100532540B1 (en) | 2003-06-05 | 2005-12-01 | 안기주 | Bubble concrete mortar composition and its manufacturing process |
| AU2007231558B2 (en) * | 2006-03-29 | 2011-06-23 | Zeobond Research Pty Ltd | Dry mix cement composition, methods and systems involving same |
-
2008
- 2008-02-29 CA CA002623132A patent/CA2623132A1/en not_active Abandoned
-
2009
- 2009-02-24 AU AU2009219061A patent/AU2009219061B2/en not_active Ceased
- 2009-02-24 US US12/919,856 patent/US8066813B2/en not_active Expired - Fee Related
- 2009-02-24 EP EP09714827.4A patent/EP2257505B1/en active Active
- 2009-02-24 CA CA2715648A patent/CA2715648C/en active Active
- 2009-02-24 WO PCT/CA2009/000216 patent/WO2009105872A1/en active Application Filing
- 2009-02-27 CL CL2009000446A patent/CL2009000446A1/en unknown
-
2010
- 2010-08-19 ZA ZA2010/05938A patent/ZA201005938B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114988831A (en) * | 2022-05-18 | 2022-09-02 | 北京华晟创元环境科技有限公司 | Filling material prepared from tailing slurry, and preparation and application methods thereof |
| CN114988831B (en) * | 2022-05-18 | 2023-08-08 | 北京华晟创元环境科技有限公司 | Filling material prepared from tailing slurry, preparation and use methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CL2009000446A1 (en) | 2010-10-15 |
| EP2257505A1 (en) | 2010-12-08 |
| ZA201005938B (en) | 2011-05-25 |
| CA2715648A1 (en) | 2009-09-03 |
| AU2009219061A1 (en) | 2009-09-03 |
| WO2009105872A1 (en) | 2009-09-03 |
| EP2257505B1 (en) | 2020-01-15 |
| CA2715648C (en) | 2013-04-02 |
| US20110048286A1 (en) | 2011-03-03 |
| EP2257505A4 (en) | 2012-01-25 |
| AU2009219061B2 (en) | 2012-11-15 |
| US8066813B2 (en) | 2011-11-29 |
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Legal Events
| Date | Code | Title | Description |
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| FZDE | Discontinued |