High-strength anti-crack foam cement

A foam cement, high-strength technology, applied in the field of cement, can solve the problems of low strength and crack resistance, achieve the effect of increasing strength and crack resistance, avoiding mold collapse, and increasing stability

Inactive Publication Date: 2019-02-05

怀宁建国混凝土制品有限责任公司

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AI-Extracted Technical Summary

Problems solved by technology

Foamed cement contains a large number of closed po...

Abstract

The invention discloses high-strength anti-crack foam cement. The cement is prepared from the following raw materials in parts by weight: 100 parts of a high-strength sulphoaluminate cement body, 10-20 parts of volcanic ash, 2-3 parts of a foaming agent, 0.01-0.015 part of sodium tripolyphosphate, 0.6-0.8 part of a foam stabilizer, 0.5-0.7 part of sodium carbonate, 0.05-0.1 part of a naphthalene water reducer, 2-4 parts of an organosilicon waterproofing agent, 4-6 parts of a reinforcing agent and 50-55 parts of water, wherein the reinforcing agent is prepared from nano silicon dioxide, modified polypropylene fiber and VAE emulsion. The cement has the advantages that the strength is high, and the crack resistance is good.

Application Domain

Ceramicware

Technology Topic

Volcanic ashEmulsion +11

Examples

Experimental program(5)
Effect test(1)

Example Embodiment

[0017] Example 1

[0018] A high-strength anti-cracking foamed cement, whose raw materials in parts by weight include: 100 parts of high-strength sulphoaluminate cement, 15 parts of pozzolan, 2.5 parts of foaming agent, 0.013 parts of sodium tripolyphosphate, 0.7 parts of foam stabilizer, and sodium carbonate 0.6 parts, 0.07 parts of naphthalene water reducing agent, 3 parts of organic silicon water-repellent agent, 5 parts of reinforcing agent, 52 parts of water. Among them, the reinforcing agent is nano silica, modified polypropylene fiber, and VAE emulsion.

Example Embodiment

[0019] Example 2

[0020] A high-strength anti-cracking foamed cement, whose raw materials in parts by weight include: 100 parts of high-strength sulphoaluminate cement, 10 parts of pozzolan, 3 parts of foaming agent, 0.01 part of sodium tripolyphosphate, 0.8 part of foam stabilizer, and sodium carbonate 0.5 part, 0.1 part of naphthalene water reducing agent, 2 parts of organic silicon water-repellent agent, 6 parts of reinforcing agent, 50 parts of water, among which, the reinforcing agent is nano-silica, modified polypropylene fiber with a length of 6mm, and VAE emulsion. , The weight ratio of nano silica, modified polypropylene fiber, and VAE emulsion is 0.5:2:1.5;

[0021] In the preparation process of modified polypropylene fiber, the polypropylene fiber was swelled in toluene for 2 hours, then moved to a nitrogen atmosphere, added benzoyl peroxide, heated to 70°C, kept stirring for 90 minutes, and then rotated to remove the toluene. Add an aqueous solution of maleic acid with a concentration of 0.7mol/l, adjust the temperature to 75°C, keep stirring for 60 minutes, filter the filter cake, wash with water, Soxhlet extraction with acetone for 10 hours, dry, and pulverize to obtain modified polypropylene fiber. , The weight ratio of polypropylene fiber, toluene, benzoyl peroxide, and maleic acid is 100:100:2.5:15.

Example Embodiment

[0022] Example 3

[0023] A high-strength anti-cracking foamed cement, whose raw materials in parts by weight include: 100 parts of high-strength sulphoaluminate cement, 20 parts of pozzolan, 2 parts of foaming agent, 0.015 parts of sodium tripolyphosphate, 0.6 parts of foam stabilizer, and sodium carbonate 0.7 parts, naphthalene water reducing agent 0.05 parts, silicone water-repellent agent 4 parts, reinforcing agent 4 parts, water 55 parts, among which, the reinforcing agent is nano silica, modified polypropylene fiber with a length of 4mm, and VAE emulsion. , The weight ratio of nano silica, modified polypropylene fiber, and VAE emulsion is 1:1:3;

[0024] In the preparation process of modified polypropylene fiber, the polypropylene fiber was swelled in toluene for 1 hour, then moved to a nitrogen atmosphere, added with benzoyl peroxide, heated to 80°C, kept stirring for 60 minutes, and rotated and evaporated to remove toluene. Add an aqueous solution of maleic acid with a concentration of 1 mol/l, adjust the temperature to 65°C, keep stirring for 90 min, filter the filter cake, wash with water, Soxhlet extraction with acetone for 8 hours, dry, and pulverize to obtain modified polypropylene fiber. The weight ratio of polypropylene fiber, toluene, benzoyl peroxide, and maleic acid is 100:200:1.25:20;

[0025] The foaming agent is sodium α-ene sulfonate and sodium dodecyl sulfonate, wherein the weight ratio of sodium α-ene sulfonate to sodium dodecyl sulfonate is 8:1;

[0026] The foam stabilizer is sodium stearate, carboxymethyl cellulose, and triethanolamine, wherein the weight ratio of sodium stearate, carboxymethyl cellulose, and triethanolamine is 7:1:3.

PUM

Description & Claims & Application Information

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High-strength anti-crack foam cement

A foam cement, high-strength technology, applied in the field of cement, can solve the problems of low strength and crack resistance, achieve the effect of increasing strength and crack resistance, avoiding mold collapse, and increasing stability

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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