An Admixture for Improving the Toughness of Cement Concrete

A cement concrete and admixture technology, applied in the field of cement concrete materials, can solve the problems of high cost, complicated process, and not being widely used, and achieve the effects of low cost, convenient use, and improved anti-damage and anti-cracking capabilities

Inactive Publication Date: 2011-12-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above four methods are expensive and complicated in actual use, and have not been widely used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of admixture that improves cement concrete toughness of the present embodiment is made of SiO 2 、Al 2 o 3 、Na 2 O, MgO, adipic acid, hexamethylenediamine and polyethylene terephthalic acid are mixed; SiO in the admixture 2 The mass percentage content is 7.9%, Al 2 o 3 The mass percentage content is 8.2%, Na 2 The mass percentage of O is 6.9%, the mass percentage of MgO is 6.2%, the mass percentage of adipic acid is 11.6%, the mass percentage of hexamethylenediamine is 22.9%, and the balance is polyparaphenylene Diformic acid.

[0015] The method of using the admixture in this embodiment is: add stones, cement, admixture and sand in sequence during the cement concrete mixing process, stir for 20s to 40s, then add water and continue to stir for 60s to 120s, wherein the amount of admixture is 1 / 2 of the cement weight 0.5% to 0.9%, stones, cement, sand and water are added in conventional amounts.

[0016] The admixture of this embodiment has been verified by ...

Embodiment 2

[0018] A kind of admixture that improves cement concrete toughness of the present embodiment is made of SiO 2 、Al 2 o 3 、Na 2 O, MgO, adipic acid, hexamethylenediamine and polyethylene terephthalic acid are mixed; SiO in the admixture 2 The mass percentage content is 9.1%, Al 2 o 3 The mass percentage content is 6.5%, Na 2 The mass percentage of O is 5.1%, the mass percentage of MgO is 7.5%, the mass percentage of adipic acid is 19.8%, the mass percentage of hexamethylenediamine is 10.5%, and the balance is polyparaphenylene Diformic acid.

[0019] The using method of present embodiment additive is the same as embodiment 1.

[0020] The admixture of this embodiment has been verified by the laboratory. Compared with conventional cement concrete materials, the toughness of the cement concrete material added with the admixture of this embodiment is about 10% higher than that of conventional materials after 7 days of use, and its toughness is improved compared with conventi...

Embodiment 3

[0022] A kind of admixture that improves cement concrete toughness of the present embodiment is made of SiO 2 、Al 2 o 3 、Na 2 O, MgO, adipic acid, hexamethylenediamine and polyethylene terephthalic acid are mixed; SiO in the admixture 2 The mass percentage content is 8.5%, Al 2 o 3 The mass percentage content is 7.4%, Na 2 The mass percentage of O is 6.5%, the mass percentage of MgO is 6.8%, the mass percentage of adipic acid is 15.8%, the mass percentage of hexamethylenediamine is 14.6%, and the balance is polyparaphenylene Diformic acid.

[0023] The using method of present embodiment additive is the same as embodiment 1.

[0024] The admixture of this embodiment has been verified by the laboratory. Compared with the conventional cement concrete material, the toughness of the cement concrete material added with the admixture of this embodiment is improved by about 20% compared with the conventional material after 7 days of use, and the toughness is improved compared w...

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PUM

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Abstract

The invention discloses an admixture for improving the toughness of cement concrete, which is prepared by mixing SiO2, Al2O3, Na2O, MgO, adipic acid, hexamethylenediamine and polyethylene terephthalic acid with a certain mass content. The admixture of the present invention has been verified by the laboratory. The toughness of the cement concrete material added with the admixture of the present invention is about 10% to 20% after 7 days of use, and about 20% to 30% after 28 days of use. Tensile strength was also improved.

Description

technical field [0001] The invention belongs to the technical field of cement concrete materials, and in particular relates to an admixture for improving the toughness of cement concrete. Background technique [0002] Cement concrete has the characteristics of high rigidity and high compressive strength, but its crack resistance, impact resistance and deformation ability are relatively poor, which leads to fatigue cracking, brittle fracture and other damages in cement concrete. It is an effective way to solve the above problems by adding cement concrete admixtures to improve the toughness and crack resistance of cement concrete and reduce brittleness. [0003] The toughness of cement concrete refers to the ability of the material to resist cracking and absorb energy during plastic deformation and fracture. The better the toughness, the less likely it is to crack and break. The toughness of cement concrete increases, the cracking and deformation resistance of cement concret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28
Inventor 张擎赵伟孙运臣尤作磊刘旭峰
Owner CHANGAN UNIV
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