Concrete anti-cracking waterproof agent and preparation method thereof

A technology of anti-cracking and waterproofing agent and concrete, which is applied in the field of construction admixtures, can solve the problems that it is not easy to meet the construction requirements, it is not easy to mix evenly, and the environmental requirements are high, so as to achieve good quality retention rate and volume retention rate, improve compactness and Water repellency, effect of improving material accumulation effect

Active Publication Date: 2019-05-24

广西南宁市邦华建材有限公司

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AI-Extracted 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 ha...

Abstract

The invention discloses a concrete anti-cracking waterproof agent which is prepared from, by weight, 100 parts of allophane powder, 30-50 parts of modified wollastonite powder, 10-18 parts of phenolicresin hollow microspheres, 10-20 parts of tricalcium phosphate, 6-8 parts of sodium hexametaphosphate, 10-18 parts of 2-amino-2-methyl-propanol, 3-5 parts of sodium thiocyanate, 8-12 parts of diethanolisopropanolamine and 10-15 parts of pentaerythritol. The invention further discloses a preparation method of the concrete anti-cracking waterproof agent. The concrete anti-cracking waterproof agenthas the advantages that concrete drying shrinkage, cracks and concrete mixture bleeding are reduced, material accumulation effect is improved, and concrete waterproof impervious performance and strength are improved, and service life of concrete is prolonged greatly.

Technology Topic

PropanolPentaerythritol +9

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Examples

Experimental program(5)
Comparison scheme(4)
Effect test(1)

Example Embodiment

[0026] Example 1

[0027] A concrete anti-cracking and waterproofing agent prepared from the following parts by weight of raw materials: 100 parts of allophane powder, 40 parts of modified wollastonite powder, 14 parts of phenolic resin hollow microspheres, 15 parts of tricalcium phosphate, and hexametaphosphate 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] Said modified wollastonite powder is prepared by the following method:

[0029] 1) Add ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water to 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, crush and pass through a 100-mesh sieve. Wollastonite powder.

[0031] The weight ratio of the ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water is 100:1:25.

[0032] The weight ratio of solution A, wollastonite powder, calcium chloride and diethylene glycol monobutyl ether is 100:280:7:15.

[0033] Said drying is vacuum drying at 45°C.

[0034] Said, the specific surface area of allophane powder is 80m 2 /g.

[0035] The particle size of the hollow phenolic resin microspheres is 120 μm.

[0036] A method for preparing concrete anti-cracking and waterproofing agent is prepared by the following steps:

[0037] 1) Add diethanol monoisopropanolamine to the phenolic resin hollow microspheres, stir for 25 minutes, to obtain the initial material;

[0038] 2) Mix and stir the modified wollastonite powder, tricalcium phosphate, sodium hexametaphosphate, 2-amino-2-methyl-propanol, sodium thiocyanate and pentaerythritol for 8 minutes to obtain the intermediate material;

[0039] 3) Add the initial material and the intermediate material to the allophane powder and stir for 15 minutes to obtain the concrete anti-cracking and waterproofing agent.

Example Embodiment

[0040] Example 2

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

[0042] Said modified wollastonite powder is prepared by the following method:

[0043] 1) Add ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water to 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, crush and pass through a 100-mesh sieve. Wollastonite powder.

[0045] The weight ratio of ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water is 100:1.2:20.

[0046] The weight ratio of solution A, wollastonite powder, calcium chloride and diethylene glycol monobutyl ether is 100:300:10:20.

[0047] Said drying is vacuum drying at 40°C.

[0048] Said, the specific surface area of allophane powder is 50m 2 /g.

[0049] The particle size of the hollow phenolic resin microspheres is 100 μm.

[0050] A method for preparing concrete anti-cracking and waterproofing agent is prepared by the following steps:

[0051] 1) Add diethanol monoisopropanolamine to the hollow phenolic resin microspheres and stir for 30 minutes to obtain the initial material;

[0052] 2) Mix and stir the modified wollastonite powder, tricalcium phosphate, sodium hexametaphosphate, 2-amino-2-methyl-propanol, sodium thiocyanate and pentaerythritol for 5 minutes to obtain the intermediate material;

[0053] 3) Add the initial material and the intermediate material to the allophane powder and stir for 10 minutes to obtain the concrete anti-cracking and waterproofing agent.

Example Embodiment

[0054] Example 3

[0055] A concrete anti-cracking and waterproofing agent prepared from the following parts by weight of raw materials: 100 parts of allophane powder, 35 parts of modified wollastonite powder, 16 parts of phenolic resin hollow microspheres, 18 parts of tricalcium phosphate, and hexametaphosphate 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] Said modified wollastonite powder is prepared by the following method:

[0057] 1) Add ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water to 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 for 2.5 hours at 50°C, cool to room temperature, filter, dry, pulverize and pass through a 100-mesh sieve to obtain Modified wollastonite powder.

[0059] The weight ratio of ethylene-vinyl acetate copolymer emulsion, α-sulfo fatty acid methyl ester and deionized water is 100:1.1:22.

[0060] The weight ratio of solution A, wollastonite powder, calcium chloride and diethylene glycol monobutyl ether is 100:290:9:18.

[0061] Said drying is vacuum drying at 42°C.

[0062] Said, the specific surface area of allophane powder is 70m 2 /g.

[0063] The particle size of the hollow phenolic resin microspheres is 110 μm.

[0064] A method for preparing concrete anti-cracking and waterproofing agent is prepared by the following steps:

[0065] 1) Add diethanol monoisopropanolamine to the hollow phenolic resin microspheres and stir for 28 minutes to obtain the initial material;

[0066] 2) Mix and stir the modified wollastonite powder, tricalcium phosphate, sodium hexametaphosphate, 2-amino-2-methyl-propanol, sodium thiocyanate and pentaerythritol for 6 minutes to obtain the intermediate material;

[0067] 3) Add the initial material and the intermediate material to the allophane powder and stir for 13 minutes to obtain the concrete anti-cracking and waterproofing agent.

PUM

Property	Measurement	Unit
Specific surface area	80.0	m²/g
Particle size	120.0	µm
Specific surface area	50.0	m²/g

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