A kind of anti-cracking waterproofing agent for concrete and preparation method thereof

An anti-crack waterproofing agent and concrete technology, applied in the field of building admixtures, can solve the problems of difficult to meet construction requirements, high environmental requirements, difficult to mix evenly, achieve good mass retention rate and volume retention rate, and improve material accumulation. effect, effect of improving compactness and water resistance

Active Publication Date: 2019-07-30
广西南宁市邦华建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the existing anti-cracking and waterproofing agents are used, expansion agents, fibers, etc. need to be added, and the construction cost is high; the construction of the expansion agent needs to be carried out in a humid environment to achieve the effect, and the construction has high environmental requirements, and the general construction environment is not easy to meet the construction requirements. ; Fiber tends to form agglomerates and is not easy to stir evenly when used. Even if a sufficient amount is added, it is still difficult to achieve the desired effect

Method used

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  • A kind of anti-cracking waterproofing agent for concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] A concrete anti-crack waterproofing agent, which is prepared from the following raw materials in parts by weight: 100 parts of allophane powder, 40 parts of modified wollastonite powder, 14 parts of phenolic resin hollow microspheres, 15 parts of tricalcium phosphate, hexametaphosphoric acid 7 parts of sodium, 14 parts of 2-amino-2-methyl-propanol, 4 parts of sodium thiocyanate, 10 parts of diethanol monoisopropanolamine, and 13 parts of pentaerythritol.

[0028] Described, modified wollastonite powder is made by following method:

[0029] 1) Add ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water into the reactor, stir and react at 25°C for 2 hours to obtain solution A;

[0030] 2) Put solution A, wollastonite powder, calcium chloride, and diethylene glycol monobutyl ether into the reactor, react at 50°C for 3 hours, cool to room temperature, filter, dry, and pass through a 100-mesh sieve after crushing. Active wollastonite p...

Embodiment 2

[0041] A concrete anti-crack waterproofing agent, which is prepared from the following raw materials in parts by weight: 100 parts of allophane powder, 30 parts of modified wollastonite powder, 18 parts of phenolic resin hollow microspheres, 20 parts of tricalcium phosphate, hexametaphosphoric acid 6 parts of sodium, 10 parts of 2-amino-2-methyl-propanol, 3 parts of sodium thiocyanate, 12 parts of diethanol monoisopropanolamine, and 15 parts of pentaerythritol.

[0042] Described, modified wollastonite powder is made by following method:

[0043] 1) Add ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water into the reactor, stir and react at 20°C for 3 hours to obtain solution A;

[0044] 2) Put solution A, wollastonite powder, calcium chloride, and diethylene glycol monobutyl ether into the reactor, react at 50°C for 2 hours, cool to room temperature, filter, dry, and pass through a 100-mesh sieve after crushing. Active wollastonite p...

Embodiment 3

[0055] A concrete anti-crack waterproofing agent, which is prepared from the following raw materials in parts by weight: 100 parts of allophane powder, 35 parts of modified wollastonite powder, 16 parts of phenolic resin hollow microspheres, 18 parts of tricalcium phosphate, hexametaphosphoric acid 7 parts of sodium, 12 parts of 2-amino-2-methyl-propanol, 4 parts of sodium thiocyanate, 11 parts of diethanol monoisopropanolamine, and 14 parts of pentaerythritol.

[0056] Described, modified wollastonite powder is made by following method:

[0057] 1) Add ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water into the reactor, stir and react at 23°C for 2.5 hours to obtain solution A;

[0058] 2) Put solution A, wollastonite powder, calcium chloride, and diethylene glycol monobutyl ether into the reactor, react at 50°C for 2.5 hours, cool to room temperature, filter, dry, and pass through a 100-mesh sieve after crushing to obtain Modified...

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Abstract

The invention discloses a concrete anti-crack waterproofing agent, which is prepared from the following raw materials in parts by weight: 100 parts of allophane powder, 30-50 parts of modified wollastonite powder, 10-18 parts of phenolic resin hollow microspheres, phosphoric acid Tricalcium 10‑20 parts, sodium hexametaphosphate 6‑8 parts, 2‑amino‑2‑methyl‑propanol 10‑18 parts, sodium thiocyanate 3‑5 parts, diethanol monoisopropanolamine 8‑ 12 parts, 10‑15 parts of pentaerythritol. The invention also discloses a preparation method of the concrete anti-crack waterproofing agent. The anti-cracking and waterproofing agent for concrete of the present invention has the excellent effects of reducing concrete drying shrinkage, reducing crack occurrence, reducing concrete mixture bleeding, improving material accumulation effect, increasing concrete waterproof and anti-seepage performance and strength, and greatly prolonging the service life of concrete.

Description

technical field [0001] The invention belongs to the technical field of building admixtures, and in particular relates to a concrete anti-cracking waterproofing agent and a preparation method thereof. Background technique [0002] With the expansion of the application range and application field of concrete materials and the improvement of engineering quality requirements, the durability of concrete structures has gradually emerged. In recent decades, there have been endless cases of structural damage caused by concrete durability problems in construction projects. The problem of concrete durability failure or structural damage has attracted great attention from academia, engineering circles, design units and government departments. The durability of concrete structures has become a problem that is of great concern in the engineering field and needs to be solved urgently. For this reason, various countries in the world are devoting themselves to solving such problems. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B103/65
Inventor 万章文曹冰
Owner 广西南宁市邦华建材有限公司
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