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Low-density foamed cement and preparation method thereof

A technology of foamed cement and low density, applied in the field of cement, can solve the problems of poor thermal insulation performance, non-flammability of foamed cement, high density of foamed cement, etc., to maintain tensile strength, reduce hydrophilicity, increase cement effect of density

Inactive Publication Date: 2019-02-01
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

[0002] Foamed cement has the properties of non-flammability, thermal insulation, and low density. It is an ideal new type of inorganic building insulation material. However, at this stage, the dry density of foamed cement that has been widely used in my country is generally 300-800kg / m 3 , compared with organic building insulation materials, the density of foamed cement is too high, and its thermal insulation performance is poor, so it cannot effectively replace the large-scale application of organic building insulation materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of low-density foamed cement, its raw material comprises by weight: 80 parts of ordinary Portland cement, 30 parts of filler, 5 parts of foaming agent, 0.3 part of foam stabilizer, 0.6 part of lithium carbonate, 1.5 parts of organic silicon waterproofing agent , 0.6 parts of carboxymethyl cellulose, 0.2 parts of naphthalene-based water reducer, 3 parts of modified coconut fiber, 0.015 parts of dispersant, 45 parts of water, wherein the fillers are polyphenylene particles, nano metakaolin, and foamed basalt waste pink.

[0021] The preparation method of the above-mentioned low-density foamed cement comprises the following steps: uniformly mixing a foaming agent, a foam stabilizer and water to obtain a foam solution; mixing ordinary Portland cement, fillers, lithium carbonate, organic silicon waterproofing agent, carboxymethyl fiber Sodium, naphthalene-based water reducer, modified coconut shell fiber, and dispersant are mixed evenly, then mixed evenly with the foa...

Embodiment 2

[0023] A kind of low-density foamed cement, its raw material comprises by weight: 80 parts of ordinary Portland cement, 20 parts of filler, 6 parts of foaming agent, 0.2 part of foam stabilizer, 0.7 part of lithium carbonate, 1 part of organic silicon waterproofing agent , 0.7 parts of carboxymethyl cellulose, 0.1 part of naphthalene-based water reducer, 4 parts of modified coconut shell fiber with a length of 4-6mm, 0.01 part of polyvinylpyrrolidone, and 50 parts of water, wherein the filler is polyphenylene particles, nanometer partial Kaolin, 1000 mesh expanded basalt waste powder;

[0024] In the preparation process of the modified coconut shell fiber, the coconut shell fiber is added to the aqueous ethanol solution of 3-mercaptopropyltrimethoxysilane with a mass fraction of 7wt%, and the temperature is raised to 90° C., kept stirring for 2 hours, and then the coconut shell fiber is taken Dry and cut into sections to obtain modified coconut fiber, wherein, in the ethanol a...

Embodiment 3

[0027] A kind of low-density foamed cement, its raw material comprises by weight: 80 parts of ordinary Portland cement, 40 parts of filler, 4 parts of foaming agent, 0.4 part of foam stabilizer, 0.5 part of lithium carbonate, 2 parts of organic silicon waterproofing agent , 0.5 parts of carboxymethyl cellulose, 0.3 parts of naphthalene-based water reducer, 2 parts of modified coconut shell fiber with a length of 4-6 mm, 0.02 parts of polyvinylpyrrolidone, and 40 parts of water, wherein the fillers are polyphenylene particles, nanometer partial Kaolin, 2000 mesh expanded basalt waste powder;

[0028] In the preparation process of the modified coconut shell fiber, the coconut shell fiber is added to the aqueous ethanol solution of 3-mercaptopropyltrimethoxysilane with a mass fraction of 5wt%, and the temperature is raised to 100° C., kept stirring for 1 hour, and then the coconut shell fiber is taken Dry and cut into sections to obtain modified coconut fiber, wherein, in the eth...

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Abstract

The invention discloses a low-density foamed cement. The low-density foamed cement comprises the following raw materials in parts by weight: 80 parts of ordinary Portland cement, 20-40 parts of a filler, 4-6 parts of a foaming agent, 0.2-0.4 parts of a foam stabilizer, 0.5-0.7 of lithium carbonate, 1-2 parts of an organosilicon waterproofing agent, 0.5-0.7 parts of carboxymethyl cellulose, 0.1-0.3parts of a naphthalene water reducing agent, 2-4 parts of modified coconut fiber, 0.01-0.02 parts of a dispersant, and 40-50 parts of water. The filler is polyphenylene particles, nano-meta-kaolin, and foamed basalt waste powder. The invention also discloses a preparation method of the above low-density foamed cement. The low-density foamed cement has low density and high tensile strength.

Description

technical field [0001] The invention relates to the technical field of cement, in particular to a low-density foamed cement and a preparation method thereof. Background technique [0002] Foamed cement has the properties of non-flammability, thermal insulation, and low density. It is an ideal new type of inorganic building insulation material. However, at this stage, the dry density of foamed cement that has been widely used in my country is generally 300-800kg / m 3 Compared with organic building insulation materials, the density of foamed cement is too high, and its thermal insulation performance is poor, so it cannot effectively replace the large-scale application of organic building insulation materials. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a low-density foamed cement and a preparation method thereof. The present invention has low density and high tensile strength. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/10C04B111/40
CPCC04B28/04C04B2111/40C04B2201/20C04B16/08C04B14/106C04B18/0427C04B24/16C04B24/32C04B24/124C04B24/122C04B24/2652C04B22/10C04B24/42C04B24/383C04B18/248C04B24/026C04B38/106C04B2103/302
Inventor 刘三宝
Owner 怀宁建国混凝土制品有限责任公司
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