CN102276183A - Admixture for enhancing toughness of cement concrete - Google Patents
Admixture for enhancing toughness of cement concrete Download PDFInfo
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- CN102276183A CN102276183A CN 201110194822 CN201110194822A CN102276183A CN 102276183 A CN102276183 A CN 102276183A CN 201110194822 CN201110194822 CN 201110194822 CN 201110194822 A CN201110194822 A CN 201110194822A CN 102276183 A CN102276183 A CN 102276183A
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- percentage composition
- quality percentage
- admixture
- cement concrete
- toughness
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Abstract
The invention discloses an admixture for enhancing the toughness of cement concrete, which is formed by mixing SiO2, Al2O3, Na2O, MgO, hexanedioic acid, hexamethylene diamine and polyethylene terephthalate according to certain mass content. The admixture provided by the invention is proved in a laboratory; the toughness of the cement concrete material added with the admixture provided by the invention is enhanced by about 10% to 20% after used for 7 days and by about 20% to 30% after used for 28 days; and compressive strength and tensile strength are also enhanced.
Description
Technical field
The invention belongs to the cement concrete material technical field, be specifically related to a kind of raising cement concrete flexible admixture.
Background technology
Cement concrete has the characteristic that rigidity is big, ultimate compression strength is high, but its splitting resistance, shock resistance and deformability are poor, causes cement concrete to be prone to destructions such as fatigue cracking, brittle rupture.By adding cement concrete admixture, improve cement concrete toughness, splitting resistance, reducing fragility is the effective ways that overcome the above problems.
The toughness of cement concrete is expression material opposing cracking, endergonic ability in viscous deformation and breaking-down process.Toughness is good more, and the possibility that then ftractures, ruptures is more little.Cement concrete toughness increases, and the cracking resistance of cement concrete and deformability strengthen, and the cement concrete crack growth rate reduces, and prolong fatigue lifetime, and corresponding cement concrete weather resistance improves.At present, improve toughness and mainly contain four kinds of methods: (1) adopts the reinforcing bar reinforcement; (2) adopt band muscle, steel plate, steel pipe, fiber bonding to improve bulk strength, to improve toughness; (3) in cement concrete, mix the short fiber material reinforcement; (4) add impregnated polymer and improve toughness.Above-mentioned four kinds of methods involve great expense in actual use, and complex process is not used widely.Based on the cement concrete material meso-scale, to reduce grout and to gather materials interface damage, the raising interface binding intensity is a target, can effectively improve cement and concrete pavement flexible admixture from the research and development of material aspect are a kind of, to improving the use properties of cement concrete, prolong cement concrete and have very big necessity and good social and economic benefit work-ing life.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, provides a kind of and can improve cement concrete flexible admixture, and this admixture is easy to use, is easy to preserve, and validity period is long, and is with low cost.It is about 10%～20% that the cement concrete material that adds this admixture uses after 7 days toughness to improve than conventional material, and it is about 20%～30% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of raising cement concrete flexible admixture is characterized in that this admixture is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 7.9%～9.1%, Al
2O
3The quality percentage composition be 6.5%～8.2%, Na
2The quality percentage composition of O is 5.1%～6.9%, and the quality percentage composition of MgO is 6.2%～7.5%, and the quality percentage composition of hexanodioic acid is 11.6%～19.8%, and the quality percentage composition of hexanediamine is 10.5%～22.9%, and surplus is a poly terephthalic acid.
Above-mentioned a kind of raising cement concrete flexible admixture, SiO in the described admixture
2The quality percentage composition be 8.2%～8.6%, Al
2O
3The quality percentage composition be 7.0%～7.8%, Na
2The quality percentage composition of O is 6.3%～6.7%, and the quality percentage composition of MgO is 6.5%～7.0%, and the quality percentage composition of hexanodioic acid is 13.2%～17.5%, and the quality percentage composition of hexanediamine is 13.9%～18.9%, and surplus is a poly terephthalic acid.
Above-mentioned a kind of raising cement concrete flexible admixture, SiO in the described admixture
2The quality percentage composition be 8.5%, Al
2O
3The quality percentage composition be 7.4%, Na
2The quality percentage composition of O is 6.5%, and the quality percentage composition of MgO is 6.8%, and the quality percentage composition of hexanodioic acid is 15.8%, and the quality percentage composition of hexanediamine is 14.6%, and surplus is a poly terephthalic acid.
The present invention compared with prior art has the following advantages:
1, admixture of the present invention is easy to use, is easy to preserve, and validity period is long, and is with low cost, in the use production technique do not had particular requirement, adopts traditional concrete mixing equipment to get final product.
2, admixture of the present invention is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that adds admixture of the present invention uses that toughness improves about 10%～20% than conventional material after 7 days, it is about 20%～30% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
3, effect is split in the resistance that has of admixture of the present invention itself, the adding of admixture has improved the anti-damage and the cracking resistance ability of cement concrete, increased the toughness of cement concrete, the admixture particles dispersed is in the cement concrete interfacial transition zone simultaneously, strengthen the cohesive strength at cement concrete interface, further improved the toughness of cement concrete.
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment
Embodiment 1
A kind of raising cement concrete flexible admixture of present embodiment is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 7.9%, Al
2O
3The quality percentage composition be 8.2%, Na
2The quality percentage composition of O is 6.9%, and the quality percentage composition of MgO is 6.2%, and the quality percentage composition of hexanodioic acid is 11.6%, and the quality percentage composition of hexanediamine is 22.9%, and surplus is a poly terephthalic acid.
The using method of present embodiment admixture is: add stone, cement, admixture and sand in the cement concrete whipping process successively, add water continuation stirring 60s～120s again after stirring 20s～40s, wherein the add-on of admixture is 0.5%～0.9% of a cement weight, and stone, cement, sand and water is amount adding routinely all.
The admixture of present embodiment is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that has added the present embodiment admixture uses that toughness improves about 10% than conventional material after 7 days, it is about 25% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
Embodiment 2
A kind of raising cement concrete flexible admixture of present embodiment is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 9.1%, Al
2O
3The quality percentage composition be 6.5%, Na
2The quality percentage composition of O is 5.1%, and the quality percentage composition of MgO is 7.5%, and the quality percentage composition of hexanodioic acid is 19.8%, and the quality percentage composition of hexanediamine is 10.5%, and surplus is a poly terephthalic acid.
The using method of present embodiment admixture is with embodiment 1.
The admixture of present embodiment is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that has added the present embodiment admixture uses that toughness improves about 10% than conventional material after 7 days, it is about 20% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
Embodiment 3
A kind of raising cement concrete flexible admixture of present embodiment is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 8.5%, Al
2O
3The quality percentage composition be 7.4%, Na
2The quality percentage composition of O is 6.5%, and the quality percentage composition of MgO is 6.8%, and the quality percentage composition of hexanodioic acid is 15.8%, and the quality percentage composition of hexanediamine is 14.6%, and surplus is a poly terephthalic acid.
The using method of present embodiment admixture is with embodiment 1.
The admixture of present embodiment is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that has added the present embodiment admixture uses that toughness improves about 20% than conventional material after 7 days, it is about 30% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
Embodiment 4
A kind of raising cement concrete flexible admixture of present embodiment is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 8.2%, Al
2O
3The quality percentage composition be 7.8%, Na
2The quality percentage composition of O is 6.3%, and the quality percentage composition of MgO is 6.5%, and the quality percentage composition of hexanodioic acid is 17.5%, and the quality percentage composition of hexanediamine is 13.9%, and surplus is a poly terephthalic acid.
The using method of present embodiment admixture is with embodiment 1.
The admixture of present embodiment is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that has added the present embodiment admixture uses that toughness improves about 15% than conventional material after 7 days, it is about 25% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
Embodiment 5
A kind of raising cement concrete flexible admixture of present embodiment is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 8.6%, Al
2O
3The quality percentage composition be 7.0%, Na
2The quality percentage composition of O is 6.7%, and the quality percentage composition of MgO is 7.0%, and the quality percentage composition of hexanodioic acid is 13.2%, and the quality percentage composition of hexanediamine is 18.9%, and surplus is a poly terephthalic acid.
The using method of present embodiment admixture is with embodiment 1.
The admixture of present embodiment is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that has added the present embodiment admixture uses that toughness improves about 20% than conventional material after 7 days, it is about 30% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
Embodiment 6
A kind of raising cement concrete flexible admixture of present embodiment is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 8.4%, Al
2O
3The quality percentage composition be 7.2%, Na
2The quality percentage composition of O is 6.6%, and the quality percentage composition of MgO is 6.9%, and the quality percentage composition of hexanodioic acid is 14.5%, and the quality percentage composition of hexanediamine is 15.7%, and surplus is a poly terephthalic acid.
The using method of present embodiment admixture is with embodiment 1.
The admixture of present embodiment is through laboratory proofing, compare with conventional cement concrete material, the cement concrete material that has added the present embodiment admixture uses that toughness improves about 10% than conventional material after 7 days, it is about 25% to use after 28 days toughness to improve than conventional material, and ultimate compression strength and tensile strength also increase.
Effect is split in the resistance that admixture of the present invention itself has, the adding of admixture has improved the anti-damage and the cracking resistance ability of cement concrete, increased the toughness of cement concrete, the admixture particles dispersed is in the cement concrete interfacial transition zone simultaneously, strengthen the cohesive strength at cement concrete interface, further improved the toughness of cement concrete.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any restriction, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the invention technical spirit.
Claims (3)
1. one kind is improved cement concrete flexible admixture, it is characterized in that this admixture is by SiO
2, Al
2O
3, Na
2O, MgO, hexanodioic acid, hexanediamine and poly terephthalic acid mix; SiO in the described admixture
2The quality percentage composition be 7.9%～9.1%, Al
2O
3The quality percentage composition be 6.5%～8.2%, Na
2The quality percentage composition of O is 5.1%～6.9%, and the quality percentage composition of MgO is 6.2%～7.5%, and the quality percentage composition of hexanodioic acid is 11.6%～19.8%, and the quality percentage composition of hexanediamine is 10.5%～22.9%, and surplus is a poly terephthalic acid.
2. a kind of raising cement concrete flexible admixture according to claim 1 is characterized in that SiO in the described admixture
2The quality percentage composition be 8.2%～8.6%, Al
2O
3The quality percentage composition be 7.0%～7.8%, Na
2The quality percentage composition of O is 6.3%～6.7%, and the quality percentage composition of MgO is 6.5%～7.0%, and the quality percentage composition of hexanodioic acid is 13.2%～17.5%, and the quality percentage composition of hexanediamine is 13.9%～18.9%, and surplus is a poly terephthalic acid.
3. a kind of raising cement concrete flexible admixture according to claim 1 is characterized in that SiO in the described admixture
2The quality percentage composition be 8.5%, Al
2O
3The quality percentage composition be 7.4%, Na
2The quality percentage composition of O is 6.5%, and the quality percentage composition of MgO is 6.8%, and the quality percentage composition of hexanodioic acid is 15.8%, and the quality percentage composition of hexanediamine is 14.6%, and surplus is a poly terephthalic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110194822 CN102276183A (en) | 2011-07-12 | 2011-07-12 | Admixture for enhancing toughness of cement concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110194822 CN102276183A (en) | 2011-07-12 | 2011-07-12 | Admixture for enhancing toughness of cement concrete |
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| Publication Number | Publication Date |
|---|---|
| CN102276183A true CN102276183A (en) | 2011-12-14 |
Family
ID=45101980
Family Applications (1)
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|---|---|---|---|
| CN 201110194822 Pending CN102276183A (en) | 2011-07-12 | 2011-07-12 | Admixture for enhancing toughness of cement concrete |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472157A (en) * | 2003-06-19 | 2004-02-04 | 同济大学 | High-toughness fibre mixed concrete and preparing method thereof |
| CN101172821A (en) * | 2007-10-25 | 2008-05-07 | 武汉理工大学 | Method for producing high-strength and high-ductility light aggregate concrete |
| US20080269382A1 (en) * | 2004-08-31 | 2008-10-30 | Michele Gerster | Stabilization of Organic Materials |
-
2011
- 2011-07-12 CN CN 201110194822 patent/CN102276183A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472157A (en) * | 2003-06-19 | 2004-02-04 | 同济大学 | High-toughness fibre mixed concrete and preparing method thereof |
| US20080269382A1 (en) * | 2004-08-31 | 2008-10-30 | Michele Gerster | Stabilization of Organic Materials |
| CN101172821A (en) * | 2007-10-25 | 2008-05-07 | 武汉理工大学 | Method for producing high-strength and high-ductility light aggregate concrete |
Non-Patent Citations (2)
| Title |
|---|
| 《Cement and Concrete Research》 20081231 Vládia Cristina G. de Souza et al. "The influence of mineralogical, chemical and physical properties on grindability of commercial clinkers with high MgO level" 第1119-1125页 1-3 第38卷, * |
| 《建筑材料学报》 20100630 佘伟 等 "较好韧性的超高强混凝土的制备及性能" 第310-314页 1-3 第13卷, 第3期 * |
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Application publication date: 20111214 |