Expansoive fiber crack-resistant waterproofing agent for concrete and preparation method thereof

A technology of anti-cracking waterproofing agent and expansion fiber, which is applied in the field of expansion fiber anti-cracking waterproofing agent for concrete and its preparation, to achieve the effect of enhancing compactness, increasing strength and reducing porosity

Active Publication Date: 2019-09-17
GUANGDONG YUESHENG SPECIAL BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention aims at the above-mentioned existing technical problems, and develops a kind of expansion fiber anti-crack waterproofing agent for concrete and its preparation method, which can not only solve the problem of crack compensation, but also enhance the impermeability of concrete at the physical level, thereby reducing the Leakage, improve the durability of concrete

Method used

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  • Expansoive fiber crack-resistant waterproofing agent for concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] An expansion fiber anti-crack waterproofing agent for concrete comprises the following components in weight percent: 25% of wollastonite powder, 15% of coal gangue powder, 30% of common pyrophyllite powder, 23% of desulfurized gypsum, and 7% of cellulose fiber.

[0036] The particle size of the desulfurized gypsum and coal gangue powder is 60 μm, and the specific surface area is greater than 400 m 2 / g; the particle size of the wollastonite powder is 10 μm, and the specific surface area is greater than 400m 2 / g; the particle size of the common pyrophyllite powder is 60 μm, and the specific surface area is greater than 400m 2 / g;

[0037] Its preparation method comprises the following steps:

[0038] S1. Carry out self-calcination of coal gangue minerals, remove the associated coal slag and impurities in the raw ore, and obtain calcined coal gangue;

[0039] S2. Grind and select the dried desulfurized gypsum, calcined coal gangue, and pyrophyllite according to the ra...

Embodiment 2

[0042] The difference between Example 2 and Example 1 is that it includes the following components by weight percentage: 20% of wollastonite powder, 26% of coal gangue powder, 34% of ordinary pyrophyllite powder, 17% of desulfurized gypsum, and 3% of cellulose fiber.

[0043] The particle size of the desulfurized gypsum and coal gangue powder is 80 μm, and the specific surface area is greater than 400 m 2 / g; the particle size of the wollastonite powder is 25 μm, and the specific surface area is greater than 400m 2 / g; the particle size of the common pyrophyllite powder is 80 μm, and the specific surface area is greater than 400m 2 / g; in the preparation method, step S2 selects powder with a particle size of 80 μm, and step S3 selects wollastonite powder with a particle size of 25 μm.

Embodiment 3

[0045] The difference between Example 3 and Example 1 is that it includes the following components by weight percentage: 15% wollastonite powder, 22% coal gangue powder, 38% ordinary pyrophyllite powder, 15% desulfurized gypsum, and 10% cellulose fiber.

[0046] The particle size of the desulfurized gypsum and coal gangue powder is 100 μm, and the specific surface area is greater than 400 m 2 / g; the particle size of the wollastonite powder is 40μm, and the specific surface area is greater than 400m 2 / g; the particle size of the ordinary pyrophyllite powder is 100μm, and the specific surface area is greater than 400m 2 / g;

[0047] In the preparation method, step S2 selects powder with a particle size of 100 μm, and step S3 selects wollastonite powder with a particle size of 40 μm.

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Abstract

The invention discloses an expansive fiber crack-resistant waterproofing agent for concrete and a preparation method thereof, belonging to the technical field of concrete admixture production; and the expansive fiber crack-resistant waterproofing agent comprises the following components in%age by weight: 15-25% of wollastonite powder, 20-32% of coal gangue powder, 30-40% of pyrophyllite powder, 15-25% of desulfurized gypsum and 3-10% of cellulose fiber. According to the invention, through the synergistic effect of the desulfurizing gypsum, the coal gangue, the pyrophyllite, the cellulose fiber and the like, the compactness of the concrete is effectively enhanced, capillary pores are reduced, and the impermeability, corrosion resistance and bending resistance are greatly improved.

Description

technical field [0001] The invention relates to the technical field of concrete admixture production, in particular to an expansion fiber anti-crack waterproofing agent for concrete and a preparation method thereof. Background technique [0002] With the increasing number of construction projects, the problem of concrete shrinkage and cracking has become increasingly prominent, which has seriously affected the durability, bearing capacity and waterproof performance of concrete. The main reason for cracks in concrete structures is that the concrete will shrink in volume during the initial setting or hardening process, and shrinkage stress will be generated inside the structure. When the stress exceeds the tensile strength of concrete, it will cause the concrete to crack and form shrinkage cracks. In order to avoid concrete cracking, the prior art mainly adopts methods such as optimizing concrete mix ratio design, increasing reinforcement ratio, reducing concrete hydration hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/12C04B24/40
CPCC04B40/0039C04B14/043C04B14/04C04B16/06C04B18/12C04B18/064C04B24/2623C04B24/40Y02W30/91
Inventor 王巨斌李根
Owner GUANGDONG YUESHENG SPECIAL BUILDING MATERIALS
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