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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

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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foamed cement contains a large number of closed pores, resulting in low strength and crack resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of high-strength anti-cracking foamed cement, its raw material comprises by weight: 100 parts of high-strength sulfoaluminate cement, 15 parts of volcanic ash, 2.5 parts of foaming agent, 0.013 part of sodium tripolyphosphate, 0.7 part of foam stabilizer, sodium carbonate 0.6 parts, 0.07 parts of naphthalene-based water reducer, 3 parts of silicone water repellent, 5 parts of reinforcing agent, and 52 parts of water, wherein the reinforcing agent is nano-silica, modified polypropylene fiber, and VAE emulsion.

Embodiment 2

[0020] A high-strength crack-resistant foamed cement, the raw materials of which include by weight: 100 parts of high-strength sulfoaluminate cement, 10 parts of pozzolan, 3 parts of foaming agent, 0.01 part of sodium tripolyphosphate, 0.8 part of foam stabilizer, sodium carbonate 0.5 parts, 0.1 parts of naphthalene-based water-reducing agent, 2 parts of silicone waterproofing agent, 6 parts of reinforcing agent, 50 parts of water, wherein the reinforcing agent is nano-silica, modified polypropylene fiber with a length of 6mm, and VAE emulsion, wherein , the weight ratio of nano-silica, modified polypropylene fiber, and VAE emulsion is 0.5:2:1.5;

[0021] During the preparation of the 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 the toluene was removed by rotary evaporation. Add an aqueous solution with a concentration of 0...

Embodiment 3

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

[0024] During the preparation of the modified polypropylene fiber, the polypropylene fiber was swelled in toluene for 1 hour, then moved to a nitrogen atmosphere, added benzoyl peroxide, heated to 80°C, kept stirring for 60 minutes, and the toluene was removed by rotary evaporation. Add an aqueous solution with a concentration of 1mol / l maleic...

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PUM

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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.

Description

technical field [0001] The invention relates to the technical field of cement, in particular to a high-strength crack-resistant foamed cement. Background technique [0002] Foamed cement is to fully foam the foaming agent mechanically through the foaming system of the foaming machine, and evenly mix the foam with the cement slurry, and then go through the pumping system of the foaming machine for cast-in-place construction or mold molding. A new type of lightweight thermal insulation material with a large number of closed pores formed by natural conservation. Foamed cement contains a large number of closed pores, resulting in low strength and crack resistance. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a high-strength crack-resistant foamed cement, which has high strength and good crack resistance. [0004] A kind of high-strength anti-crack foaming cement proposed by the presen...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B38/10C04B24/26C04B24/38C04B24/16C04B20/02C04B16/06C04B111/20
CPCC04B20/023C04B28/065C04B38/10C04B40/0039C04B2103/42C04B2103/48C04B2111/2038C04B14/14C04B24/16C04B22/16C04B24/085C04B24/383C04B24/122C04B22/10C04B24/226C04B24/42C04B14/062C04B16/0633C04B24/2623
Inventor 刘三宝
Owner 怀宁建国混凝土制品有限责任公司
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