US3498809A - Finishing mortar - Google Patents
Finishing mortar Download PDFInfo
- Publication number
- US3498809A US3498809A US528836A US3498809DA US3498809A US 3498809 A US3498809 A US 3498809A US 528836 A US528836 A US 528836A US 3498809D A US3498809D A US 3498809DA US 3498809 A US3498809 A US 3498809A
- Authority
- US
- United States
- Prior art keywords
- water
- gel
- mortar
- finishing
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004570 mortar (masonry) Substances 0.000 title description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 48
- 239000000499 gel Substances 0.000 description 30
- 239000011230 binding agent Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 20
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 19
- 239000000920 calcium hydroxide Substances 0.000 description 19
- 235000011116 calcium hydroxide Nutrition 0.000 description 19
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 18
- 239000000203 mixture Substances 0.000 description 18
- 229920002678 cellulose Polymers 0.000 description 16
- 239000001913 cellulose Substances 0.000 description 16
- 239000000945 filler Substances 0.000 description 15
- 150000003839 salts Chemical class 0.000 description 13
- 239000000243 solution Substances 0.000 description 11
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 9
- 229910052751 metal Chemical class 0.000 description 9
- 229920003086 cellulose ether Polymers 0.000 description 8
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 8
- 239000002184 metal Chemical class 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 7
- 239000011256 inorganic filler Substances 0.000 description 7
- 229910003475 inorganic filler Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000001164 aluminium sulphate Substances 0.000 description 6
- 235000011128 aluminium sulphate Nutrition 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 150000007529 inorganic bases Chemical class 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920002689 polyvinyl acetate Polymers 0.000 description 5
- 239000011118 polyvinyl acetate Substances 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000010459 dolomite Substances 0.000 description 3
- 229910000514 dolomite Inorganic materials 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- 239000003232 water-soluble binding agent Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- 235000005074 zinc chloride Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000008001 rakum palm Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- 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
- C04B28/005—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 gelatineous or gel forming binders, e.g. gelatineous Al(OH)3, sol-gel binders
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
-
- 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
Definitions
- This invention represents an improvement over the known finishing mortars (composed of a filler, a binder, and water) which involves utilizing as the binder a combination of (a) an inorganic gel which is the reaction product of an inorganic base and a metal salt and (b) a water soluble cellulose derivative.
- finishing mortars of the kind here referred to are known as sand-putties.
- Such mortars are characteristic, interalia, by having a'binder content which is low as compared to that of conventional finishing mortars containing mainly lime, lime plus, cement, or gypsum as a binder,
- These sand-putties find use mainly for surface finishing 0n comparatively smooth concrete and light concrete walls. They are pre-fabricated to be ready for use and are stored up in a wet-mixed state.
- finishing mortars have a putty-like character, their thick consistency being due, primarily, to the presence of the cellulose derivative. This involves the drawback of necessitating the content of cellulose derivative or other Watersoluble thickener to be selected higher than would be required from a binding point of view alone. For this reason, said content usually is kept as high as from 0.5% to 1.0% which makes the finishing coat applied to the surface of a building more or less sensitive to water.
- the present invention has for its object to highly improve the water resistance of finishing mortars, or sandputties, of the kind referred to.
- the Water-soluble cellulose derivative is substituted in par by a synthetic inorganic gel produced by reacting an inorganic base with a metal salt and adapted to take over the thickening function of the cellulose derivative.
- This modification also involves further advantages, the most important one being that of imparting to the finishing mortar a more pronounced thixotropic character which will improve the operating or applying characteristics.
- the capacity of spray applicator equipment used has been found to increase by to 50% when spraying a product according to this invention, as compared to products hitherto used.
- the mortar will exhibit excellent properties as regards its capability of filling out relatively deep cavities without shrinking-in and cracking.
- the improved water resistance is due primarily to the reduced content of the water-soluble binder component.
- Such component cannot be omitted entirely, particularly in cases where the finishing mortar is to be used on smooth concrete surfaces or the like, a certain quantity of cellulose derivative or the like being then necessary in order to obtain satisfactory adhesion.
- reaction product obtained by reacting calcium hydroxide with aluminum sulphate.
- This reaction is suitably carried out by pouring a solution of aluminium sulphate into a slurry of slaked lime in water during vigorous stirring thereof.
- a so-called dissolver or any other high-speed mixer equivalent thereto it is preferable to use a so-called dissolver or any other high-speed mixer equivalent thereto, although any other apparatus exerting the required mixing power may be employed.
- the addition of aluminium sulphate may be varied depending on the desired gel viscosity and the desired excess of calcium hydroxide.
- the viscosity of the gel will also depend on its water content.
- the mole ratio of base to the metal salt can range from about 31:1 to about 1:1, and preferably is from about 31:1 to about 7.8: 1.
- this mortar may have added to it between 25 and kg. of a water resistant binder, such as, for example, polyvinyl acetate, co-polymers of vinyl acetate, or acrylate, in the form of an emulsion or a dispersion.
- a water resistant binder such as, for example, polyvinyl acetate, co-polymers of vinyl acetate, or acrylate, in the form of an emulsion or a dispersion.
- the content of cellulose derivative before a possible extra addition of a water resistant binder is still as high as 0.4%.
- this content may be substantially reduced.
- a very satisfactory finishing mortar having high water resistance has been produced with as little as 60 kg. of 6.6% cellulose ether solution and 105 kg. of a polyvinyl acetate dispersion, giving a content of no more than 0.2% water soluble binder.
- the amount of inorganic gel may also be varied. In the example, the gel quantity of the concentration stated amounts to 27% of the filler material quantity.
- the mortar thus obtained may, of course, have a water resistant binder added to it in proportions similar to those of Example A.
- filler materials in the examples described crushed and graded dolomite or limestone, respectively, with a maximum grain size of 0.5 mm. has been used. However, there is no objection to the use of granular materials of different compositions or of larger maximum grain sizes. Thus, it is possible to use filler materials of grain sizes as large as 1 mm., which may be desirable where particularly thick coats of plastering are to be applied.
- the filler material should, however, be graded as well as possible, i.e. it should follow generally accepted rules for the grading of filler material for plasters and mortars.
- the product prepared in accordance with Example C has been found to possess, after setting, a resistance to mechanical wear in a wet state being 5 to times as as that of prior art products of the corresponding
- the use of a gel obtained from calcium hydroxide and aluminium sulphate as described hereinbefore has been found to involve a surprisingly satisfactory effect as regards capacity increase of the spraying equipment used for applying the product. It has been found by repeated tests that the capacity of such applicator equipment was increased by 25 to 50% in terms of litres per minute. The reason for this resides in the pronounced thixotropic properties of the product which enable the material to pass more readily through hoses and nozzles.
- a suitable inorganic gel may be produced by effecting reaction inwater between calcium hydroxide and aluminum sulphate.
- other inorganic bases and metal salts may be used, as well.
- the metallic element of the salt is capable of forming a hydroxide which is difiiculty soluble in water and is prone to forming gels, either in itself or by amphoteric reactions.
- the metal component thereof, besides aluminium, may be zinc, for example and in particular zinc and sulphate.
- ammonium hydroxide may be mentioned.
- the metal salt without any inconvenience, may be a chloride, for example.
- the viscosity of the gel may be specified. Finishing mortars of excellent'qualities have been obtained when using a gel which, at a water content of about 65%, had a viscosity of between 100,000 and 200,000 cp., as measured at +20 C. with a Brookfield viscosimeter equipped with a so-called Helipath Stand.
- the gel of Example A has a viscosity of about 115,000 to 170,000 cp., measured as just described. The viscosity obtained of the gel will depend on the effectiveness of the mixing procedure.
- the method according to claim 1 which comprises additionally admixing a material to impart greater water resistance selected from the group consisting of polyvinyl acetate and the copolymers of vinyl acetate and acrylate in the form of emulsions and dispersions.
- a mortar composition in accordance with claim 4 which additionally contains a material to impart greater water resistance selected from the group consisting of polyvinyl acetate and the copolymers of vinyl acetate and acrylate in the form of emulsions and dispersions.
Description
United States Patent 3,498,809 FINISHING MORTAR Karl Olof Natanael Andersson, Skogsviksvagen 51, Danderyd, Sweden, and Stig Holmgren, Vasbygatan 3a, Sala, Sweden No Drawing. Filed Feb. 21, 1966, Ser. No. 528,836 Claims priority, application Sweden, Feb. 27, 1965, 2,599/65 Int. Cl. C04b 19/02 US. Cl. 106-115 14 Claims ABSTRACT OF THE DISCLOSURE This invention represents an improvement over the known finishing mortars (composed of a filler, a binder, and water) which involves utilizing as the binder a combination of (a) an inorganic gel which is the reaction product of an inorganic base and a metal salt and (b) a water soluble cellulose derivative.
It is known to produce a finishing or plastering mortar containing a Water-soluble cellulose derivative as a binder, inorganic filler material of different grain sizes, and water in an amount suflicient to impart to the mortar a suitable consistency. It is known also to such mortars to add, as an additional binder, slaked lime and mineral gelling substances, such as bentonite.
Certain finishing mortars of the kind here referred to are known as sand-putties. Such mortars are characteristic, interalia, by having a'binder content which is low as compared to that of conventional finishing mortars containing mainly lime, lime plus, cement, or gypsum as a binder, These sand-putties find use mainly for surface finishing 0n comparatively smooth concrete and light concrete walls. They are pre-fabricated to be ready for use and are stored up in a wet-mixed state. These finishing mortars have a putty-like character, their thick consistency being due, primarily, to the presence of the cellulose derivative This involves the drawback of necessitating the content of cellulose derivative or other Watersoluble thickener to be selected higher than would be required from a binding point of view alone. For this reason, said content usually is kept as high as from 0.5% to 1.0% which makes the finishing coat applied to the surface of a building more or less sensitive to water.
The present invention has for its object to highly improve the water resistance of finishing mortars, or sandputties, of the kind referred to. According to the invention, the Water-soluble cellulose derivative is substituted in par by a synthetic inorganic gel produced by reacting an inorganic base with a metal salt and adapted to take over the thickening function of the cellulose derivative. This modification also involves further advantages, the most important one being that of imparting to the finishing mortar a more pronounced thixotropic character which will improve the operating or applying characteristics. Thus the capacity of spray applicator equipment used has been found to increase by to 50% when spraying a product according to this invention, as compared to products hitherto used. Also, the mortar will exhibit excellent properties as regards its capability of filling out relatively deep cavities without shrinking-in and cracking.
The improved water resistance is due primarily to the reduced content of the water-soluble binder component. Such component, however, as a rule, cannot be omitted entirely, particularly in cases where the finishing mortar is to be used on smooth concrete surfaces or the like, a certain quantity of cellulose derivative or the like being then necessary in order to obtain satisfactory adhesion.
3,498,809 Patented Mar. 3, 1970 A certain amount of water-soluble cellulose derivative will also have the favourable effect of inhibiting separation of the finishing mortar during long-time storage.
The reduction in quantity of comparatively expensive cellulose derivatives will enable, within an unchanged frame of overall raw material cost, to add, in addition to the inorganic gel, a larger quantity of water resistant binders in the form of aqueous emulsions or dispersions which, on drying, will form water resistant films and, hence, will result in the obtainment of a practically water resistant product. As the said synthetic inorganic gel,
there is used, according to the invention, in the first place the reaction product obtained by reacting calcium hydroxide with aluminum sulphate. This reaction is suitably carried out by pouring a solution of aluminium sulphate into a slurry of slaked lime in water during vigorous stirring thereof. As an apparatus for effecting a sufficiently effective stirring, it is preferable to use a so-called dissolver or any other high-speed mixer equivalent thereto, although any other apparatus exerting the required mixing power may be employed.
Starting from a certain quantity of lime, the addition of aluminium sulphate may be varied depending on the desired gel viscosity and the desired excess of calcium hydroxide. Thus, by using equi-molecular quantities, it will also be possible to obtain a neutrally reacting gel. The viscosity of the gel, of course, will also depend on its water content. The mole ratio of base to the metal salt can range from about 31:1 to about 1:1, and preferably is from about 31:1 to about 7.8: 1.
The production of a mortar for finishing purposes may be exemplified as follows:
EXAMPLE A 200 kg. slaked lime is suspended in 250 kg. water, A solution of 30 kg. aluminium sulphate in 150 kg. water is added slowly while stirring vigourously, thereby forming a gel. Using this gel, a mortar of the following composition is produced:
kg. 6.6% cellulose ether solution 315 kg. gel
1150 kg. graded filler material, and water to sultable consistency.
Where an extra-high water resistance is desired, this mortar may have added to it between 25 and kg. of a water resistant binder, such as, for example, polyvinyl acetate, co-polymers of vinyl acetate, or acrylate, in the form of an emulsion or a dispersion.
In the above-mentioned example, the content of cellulose derivative before a possible extra addition of a water resistant binder is still as high as 0.4%. When adding water resistant binders in the form of dispersions or emulsions, however, this content may be substantially reduced. Thus, a very satisfactory finishing mortar having high water resistance has been produced with as little as 60 kg. of 6.6% cellulose ether solution and 105 kg. of a polyvinyl acetate dispersion, giving a content of no more than 0.2% water soluble binder. The amount of inorganic gel may also be varied. In the example, the gel quantity of the concentration stated amounts to 27% of the filler material quantity. Even gel additions of an order as low as 10% of the quantity of filler material will very favourably influence the properties of the finishing mortar from the points of view of workability and filling-in effect. A usable finishing mortar containing 40% gel by weight of the filler material has been produced.
EXAMPLE B Herebelow a Second procedure of producing a finishing mortar according to the invention will be described: 60 kg. of aluminium sulphate is dissolved in 435 kg.
3 i of water, after which 100 kg. of slaked lime is poured into the solution while stirring vigourously, thereby forming a gel. Added thereto are first 155 kg. of a 6.6% cellulose ether solution, and then 2150 kg. of a graded filler material while stirring, as well as water in a sufficient amount to obtain a suitable consistency.
The mortar thus obtained may, of course, have a water resistant binder added to it in proportions similar to those of Example A.
EXAMPLE C A third manner of producing a plastering mortar having a very good water resistance will now be described.
In a vessel, and using a dissolver, one mixes 480 kg. water, 240 kg. calcium hydrate and 400 kg. dolomite of a finely divided fraction, preferably having a grain size belw 0.25 mm. Added to this mixture, while continuing agitation with the dissolver, is a solution of 36 kg. aluminium sulphate in 180 kg. water, After stirring to a gelly consistency, the mixture thus obtained is pumped into a storage tank from which it is discharged for preparing the final product in a conventional concrete mixer as follows:
500 kg. pre-fabricated mixture of the kind just described 72 kg. 6% aqueous solution of a cellulose derivative 900 kg. dolomite, grain size 0 to 0.35 mm.
61 kg. water dispersion of a polyvinyl acetate co-polymer (having a good water resistance) Water to suitable consistency.
In this example a different mixing order has been followed, in that a portion of the graded filler material was added already in the preparatory mixture. This has been found to have a favourable influence on the consistency of the preparatory mixture.
As filler materials in the examples described, crushed and graded dolomite or limestone, respectively, with a maximum grain size of 0.5 mm. has been used. However, there is no objection to the use of granular materials of different compositions or of larger maximum grain sizes. Thus, it is possible to use filler materials of grain sizes as large as 1 mm., which may be desirable where particularly thick coats of plastering are to be applied. The filler material should, however, be graded as well as possible, i.e. it should follow generally accepted rules for the grading of filler material for plasters and mortars.
The product prepared in accordance with Example C has been found to possess, after setting, a resistance to mechanical wear in a wet state being 5 to times as as that of prior art products of the corresponding The use of a gel obtained from calcium hydroxide and aluminium sulphate as described hereinbefore has been found to involve a surprisingly satisfactory effect as regards capacity increase of the spraying equipment used for applying the product. It has been found by repeated tests that the capacity of such applicator equipment was increased by 25 to 50% in terms of litres per minute. The reason for this resides in the pronounced thixotropic properties of the product which enable the material to pass more readily through hoses and nozzles.
As already mentioned, a suitable inorganic gel may be produced by effecting reaction inwater between calcium hydroxide and aluminum sulphate. However, other inorganic bases and metal salts may be used, as well. In this case the only essential thing would be that the metallic element of the salt is capable of forming a hydroxide which is difiiculty soluble in water and is prone to forming gels, either in itself or by amphoteric reactions. The metal component thereof, besides aluminium, may be zinc, for example and in particular zinc and sulphate. To exemplify inorganic bases other than calcium hydroxide, ammonium hydroxide may be mentioned. In this latter case, the metal salt, without any inconvenience, may be a chloride, for example. As a measure of the usability of the gel, as a thickener in the finishing mortar,
the viscosity of the gel may be specified. Finishing mortars of excellent'qualities have been obtained when using a gel which, at a water content of about 65%, had a viscosity of between 100,000 and 200,000 cp., as measured at +20 C. with a Brookfield viscosimeter equipped with a so-called Helipath Stand. The gel of Example A has a viscosity of about 115,000 to 170,000 cp., measured as just described. The viscosity obtained of the gel will depend on the effectiveness of the mixing procedure.
What is to be claimed is:'
1. In the known method of producing a finishing mortar by admixing (a) a fine, granular, graded, inorganic filler material,
(b) a water soluble cellulose ether binder solution, and
(c) water in an amount to impart suitable consistency,
the improvement which comprises:
(1) bringing together calcium hydroxide and aluminum sulfate in a mole ratio from about 31:1 to 1:1 in a reaction zone under vigorous mixing conditions so as to form an inorganic gel (2) admixing said inorganic gel in the amount of 1040% based on the weight of the filler with said water soluble cellulose ether binder solution, said fine, granular, graded, inorganic filler material, and said water.
2. The method according to claim 1 which comprises additionally admixing a material to impart greater water resistance selected from the group consisting of polyvinyl acetate and the copolymers of vinyl acetate and acrylate in the form of emulsions and dispersions.
3. In the known method of producing a finishing mortar by admixing (a) a fine, granular, graded, inorganic filler material,
(b) a water soluble cellulose derivative binder, and
(c) water in an amount to impart suitable consistency,
the improvement which comprises:
(1) bringing an inorganic base selected from the group consisting of calcium hydroxide and ammonium hydroxide together in a reaction zone with a metal salt selected from the group consisting of aluminum sulfate, and zinc chloride in a mole ratio of base to salt from about 31:1 to 1:1 under vigorous mixing conditions so as to form an inorganic gel,
(2) admixing said inorganic gel in the amount of about 10-40% by weight based on the weight of the filler, with said water soluble cellulose derivative binder, said fine, granular, graded, inorganic filler material, and said water.
4. In the known combination of (a) a fine, granular, graded, inorganic filler material,
(b) a water soluble cellulose ether binder solution,
and
(c) water in an amount to impart a suitable consistency, which combination is useful as a finishing mortar and which has a putty-like character, the improvement in such mortar composition which comprises as part of the binder along with said cellulose ether binder solution, a synthetic inorganic gel which is the reaction product of calcium hydroxide and aluminum sulfate in a mole ratio of about 31:1 to 1:1, and with said gel being present in the amount of about 10-40% based on the weight of the filler, the improved mortar composition being characterized by ease of spray application, capability of filling out deep cavities without shrinking-in and cracking, and good water resistance.
5. A mortar composition in accordance with claim 4 which additionally contains a material to impart greater water resistance selected from the group consisting of polyvinyl acetate and the copolymers of vinyl acetate and acrylate in the form of emulsions and dispersions.
6. In the known combination of (a) a fine, granular, graded, inorganic filler material.
(b) a water soluble cellulose derivative binder, and
(c) water in an amount to impart a suitable consistency which combination is useful as a finishing mortar and which has a putty-like character, the improvement in such mortar composition which comprises as part of the binder along with said water soluble cellulose derivative binder about lO-40% by weight (based on the weight of the filler) of a synthetic inorganic gel which is the reaction product of an inorganic base selected from the group consisting of calcium hydroxide and ammonium hydroxide and a metal salt selected from the group consisting of aluminum sulfate, zinc sulfate and zinc chloride, wherein the mole ratio of said base to said salt is about 31:1 to 1:1, and the improved mortar composition being characterized by ease of spray application, capability of filling out deep cavities without shrinking-in and cracking, and good water resistance.
7. The method according to claim 1 which comprises bringing together said calcium hydroxide and said aluminum sulfate in a mole ratio of from about 31:1 to 7.8: 1.
8. The method according to claim 3 which comprises bringing calcium hydroxide together in a reaction zone with aluminum sulfate.
9. The mortar composition according to claim 4 wherein said calcium hydroxide and aluminum sulfate are in a mole ratio of about 3121 to 7.811,
10. The mortar composition according to claim 6 wherein said base and said salt are in a mole ratio of about 40:1 to 7.8:1.
11. The mortar composition according to claim 6 wherein said base is calcium hydroxide.
12. The mortar composition according to claim 6 wherein said salt is aluminum sulfate.
13. The mortar composition according to claim 6 wherein said salt is calcium hydroxide and said base is aluminum sulfate.
14. The mortar composition according to claim 6 wherein said Water soluble cellulose derivatives is a cellulose ether.
References Cited UNITED STATES PATENTS 2,592,345 4/ 1952 Schnell et al 106-115 FOREIGN PATENTS 696,965 9/ 1953 Great Britain.
JAMES E. POER, Primary Examiner US. Cl. X.R. 106-1l8, 119
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE259965 | 1965-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3498809A true US3498809A (en) | 1970-03-03 |
Family
ID=20260261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US528836A Expired - Lifetime US3498809A (en) | 1965-02-27 | 1966-02-21 | Finishing mortar |
Country Status (4)
Country | Link |
---|---|
US (1) | US3498809A (en) |
FI (1) | FI49397B (en) |
GB (1) | GB1139363A (en) |
NO (1) | NO117066B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011355A (en) * | 1974-07-15 | 1977-03-08 | Mandish Theodore O | Emulsion coating for lightweight aggregate |
EP0351105A1 (en) * | 1988-07-14 | 1990-01-17 | Fosroc International Limited | Backfilling in mines |
FR2637318A1 (en) * | 1988-10-03 | 1990-04-06 | Fobroc International Ltd | METHOD AND APPARATUS FOR PLACING A SELF-CURING LIQUID MORTAR UNDER WET CONDITIONS, PARTICULARLY IN GAMES OR GAPS BETWEEN THE WALL TRIMS IN A TUNNEL |
US5723516A (en) * | 1993-10-14 | 1998-03-03 | Minnesota Mining And Manufacturing Company | Inorganic particles coated with organic polymeric binders composite sheets including same and methods of making said coated particles |
US20080202415A1 (en) * | 2007-02-28 | 2008-08-28 | David Paul Miller | Methods and systems for addition of cellulose ether to gypsum slurry |
US20090044726A1 (en) * | 2007-08-13 | 2009-02-19 | Fred Brouillette | Cement Stabilization of Soils Using a Proportional Cement Slurry |
US8430956B2 (en) | 2007-08-13 | 2013-04-30 | Texas Industries, Inc. | Stabilization of soils using a proportional lime slurry |
US8714809B2 (en) | 2007-08-13 | 2014-05-06 | Texas Industries, Inc. | System for manufacturing a proportional slurry |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996014275A1 (en) * | 1994-11-08 | 1996-05-17 | Holderchem Holding Ag | Sol-gel additive for systems with inorganic binders |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2592345A (en) * | 1947-08-25 | 1952-04-08 | Durisol Inc | Method for producing lightweight concrete |
GB696965A (en) * | 1950-12-06 | 1953-09-09 | Gustaf Bristol Heijmer | Improvements in or relating to plaster, putty or the like compositions for building purposes |
-
1966
- 1966-02-21 US US528836A patent/US3498809A/en not_active Expired - Lifetime
- 1966-02-21 GB GB7505/66A patent/GB1139363A/en not_active Expired
- 1966-02-25 FI FI479/66A patent/FI49397B/fi active
- 1966-02-25 NO NO161857A patent/NO117066B/no unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2592345A (en) * | 1947-08-25 | 1952-04-08 | Durisol Inc | Method for producing lightweight concrete |
GB696965A (en) * | 1950-12-06 | 1953-09-09 | Gustaf Bristol Heijmer | Improvements in or relating to plaster, putty or the like compositions for building purposes |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011355A (en) * | 1974-07-15 | 1977-03-08 | Mandish Theodore O | Emulsion coating for lightweight aggregate |
EP0351105A1 (en) * | 1988-07-14 | 1990-01-17 | Fosroc International Limited | Backfilling in mines |
FR2637318A1 (en) * | 1988-10-03 | 1990-04-06 | Fobroc International Ltd | METHOD AND APPARATUS FOR PLACING A SELF-CURING LIQUID MORTAR UNDER WET CONDITIONS, PARTICULARLY IN GAMES OR GAPS BETWEEN THE WALL TRIMS IN A TUNNEL |
EP0364149A1 (en) * | 1988-10-03 | 1990-04-18 | Fosroc International Limited | Grouting method and apparatus |
US5723516A (en) * | 1993-10-14 | 1998-03-03 | Minnesota Mining And Manufacturing Company | Inorganic particles coated with organic polymeric binders composite sheets including same and methods of making said coated particles |
US20080202415A1 (en) * | 2007-02-28 | 2008-08-28 | David Paul Miller | Methods and systems for addition of cellulose ether to gypsum slurry |
US20090044726A1 (en) * | 2007-08-13 | 2009-02-19 | Fred Brouillette | Cement Stabilization of Soils Using a Proportional Cement Slurry |
US7993451B2 (en) | 2007-08-13 | 2011-08-09 | Texas Industries, Inc. | Cement stabilization of soils using a proportional cement slurry |
US8430956B2 (en) | 2007-08-13 | 2013-04-30 | Texas Industries, Inc. | Stabilization of soils using a proportional lime slurry |
US8714809B2 (en) | 2007-08-13 | 2014-05-06 | Texas Industries, Inc. | System for manufacturing a proportional slurry |
Also Published As
Publication number | Publication date |
---|---|
NO117066B (en) | 1969-06-23 |
FI49397B (en) | 1975-02-28 |
GB1139363A (en) | 1969-01-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3959003A (en) | Thixotropic cementing compositions | |
CA2262068C (en) | Water-soluble or water-swellable copolymers containing sulfonic groups, methods of preparing them, and applications | |
JP4070825B2 (en) | Pre-mixed curable bonding compound | |
JP2000500731A (en) | Flexible architectural material composition | |
JPH0218346A (en) | Cementitious composition | |
US3498809A (en) | Finishing mortar | |
CN108947406A (en) | A kind of polymer cement waterproof paint and preparation method thereof | |
IL30745A (en) | Cement compositions | |
JPS6232145B2 (en) | ||
US2819171A (en) | Hydraulic cement compositions and method of making same | |
US3788869A (en) | Concrete compositions or mixes and additive therefor | |
EP2909152A1 (en) | Additive for hydraulically setting mixtures | |
US3335018A (en) | Composition and method for stabilizing soil | |
CA2504186C (en) | Lightweight joint treatment formulation | |
US3366502A (en) | Densifier and waterproofing agents for mortar and concrete and method of making same | |
US2032071A (en) | Cementitious paint and plastic composition | |
US3723146A (en) | Retarded gypsum plaster for use in long set aggregate mortar applications | |
US3097955A (en) | Cement product | |
JPS6022153B2 (en) | Concrete spraying construction method | |
US3057742A (en) | Wall plasters and their preparation | |
US1579766A (en) | Slaked lime and the process of producing it | |
US2194777A (en) | Cement | |
US2201667A (en) | Inorganic chemical product and process of producing the same | |
US2013811A (en) | Hydrated lime composition | |
JP7442367B2 (en) | Raw material set for polymer cement composition, polymer cement composition and manufacturing method thereof, and cured polymer cement product |