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Anti-crack concrete and preparation method thereof

A concrete and anti-cracking agent technology, applied in the field of concrete materials, can solve problems affecting the bearing capacity, stiffness and normal use function of concrete components, the durability of concrete structures, and affecting engineering safety.

Inactive Publication Date: 2020-07-07
东莞市易发混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing concrete is prone to cracking. When the crack width exceeds a certain limit, it will not only affect the bearing capacity, stiffness and normal use function of the concrete member, but also provide a path for the penetration of chloride ion plasma, resulting in a decrease in the durability of the concrete structure. It also seriously affects the safety of engineering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A crack-resistant concrete, comprising the following components by weight: 100 parts of Portland cement, 55 parts of water, 180 parts of gravel, 130 parts of sand, 25 parts of fly ash, 17 parts of composite anti-cracking agent, and 10 parts of admixture 3 parts, composite water reducer 3 parts.

[0033] Further, each part of the composite anti-cracking agent includes the following components by weight: 18 parts of corncob powder, 10 parts of polypropylene fiber, 13 parts of rice husk ash, and 9 parts of sodium polyacrylate water-absorbing resin.

[0034] Further, each admixture includes the following components by weight: 7 parts of natural zeolite powder, 3 parts of barium sulfide powder, and 0.3 part of air-entraining agent.

[0035] Further, the Portland cement is Portland cement with a strength grade of 42.5.

[0036] Further, the crushed stone is continuously graded crushed stone with a particle size of 5-15 mm, the sand is river sand, and the river sand is compos...

Embodiment 2

[0048] A crack-resistant concrete, comprising the following components by weight: 90 parts of Portland cement, 45 parts of water, 160 parts of gravel, 120 parts of sand, 20 parts of fly ash, 15 parts of composite anti-cracking agent, and 9 parts of admixture 2 parts, 2 parts of composite water reducing agent.

[0049] Further, each part of the composite anti-cracking agent includes the following components by weight: 16 parts of corncob powder, 8 parts of polypropylene fiber, 10 parts of rice husk ash, and 8 parts of sodium polyacrylate water-absorbing resin.

[0050] Further, each admixture includes the following components by weight: 6 parts of natural zeolite powder, 2 parts of barium sulfide powder, and 0.2 part of air-entraining agent.

[0051] Further, the Portland cement is Portland cement with a strength grade not lower than 42.5.

[0052] Further, the crushed stone is continuously graded crushed stone with a particle size of 5-15 mm, the sand is river sand, and the r...

Embodiment 3

[0063] In this embodiment, a crack-resistant concrete includes the following components by weight: 110 parts of Portland cement, 60 parts of water, 210 parts of gravel, 140 parts of sand, 30 parts of fly ash, and 20 parts of composite anti-cracking agent. 12 parts, 12 parts of admixture, 5 parts of composite superplasticizer.

[0064] Further, each part of the composite anti-cracking agent includes the following components by weight: 20 parts of corncob powder, 12 parts of polypropylene fiber, 16 parts of rice husk ash, and 10 parts of sodium polyacrylate water-absorbing resin.

[0065] Further, each admixture includes the following components by weight: 10 parts of natural zeolite powder, 4 parts of barium sulfide powder, and 0.4 part of air-entraining agent.

[0066] Further, the crushed stone is continuously graded crushed stone with a particle size of 5-15 mm, the sand is river sand, and the river sand is composed of coarse sand with a fineness modulus of 2.9-2.5 and a fin...

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Abstract

The invention relates to the technical field of concrete materials, in particular to anti-crack concrete and a preparation method thereof. The anti-crack concrete comprises the following components inparts by weight: 90-110 parts of Portland cement, 45-60 parts of water, 160-210 parts of gravels, 120-140 parts of sand, 20-30 parts of fly ash, 15-20 parts of a composite anti-crack agent, 9-12 parts of an additive and 2-5 parts of a composite water reducing agent. According to the invention, the composite anti-cracking agent is matched with the Portland cement, the fly ash, the admixture, the composite water reducing agent and other components, the compactness and the compressive strength of the anti-crack concrete can be improved, and the waterproof and shrinkage compensation effects of the concrete can be achieved, so that the prepared anti-crack concrete has excellent crack resistance, permeability resistance and compressive strength and is long in service life. The preparation method is simple and efficient, convenient to operate and control, stable in product quality and beneficial to industrial production.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a crack-resistant concrete and a preparation method thereof. Background technique [0002] At present, concrete has been widely used in structures such as buildings, bridges, dams and subsea tunnels. However, the existing concrete is prone to cracking. When the crack width exceeds a certain limit, it will not only affect the bearing capacity, stiffness and normal use function of the concrete member, but also provide a path for the penetration of chloride ion plasma, resulting in a decrease in the durability of the concrete structure. It also seriously affects engineering safety. Therefore, how to improve the anti-crack performance and safety of anti-crack concrete has attracted more and more attention. Contents of the invention [0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a crack...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50
Inventor 蔡启涌吴曙弘
Owner 东莞市易发混凝土有限公司
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