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Ultra-low apparent density and high-performance foam concrete material and its preparation method

A foamed concrete and apparent density technology, applied in the field of building materials, can solve the problem of less foamed concrete with low apparent density, and achieve the effects of ultra-low apparent density, convenient operation and small thermal conductivity

Inactive Publication Date: 2012-04-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for low apparent density foam concrete (apparent density3 ) but few studies

Method used

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  • Ultra-low apparent density and high-performance foam concrete material and its preparation method
  • Ultra-low apparent density and high-performance foam concrete material and its preparation method
  • Ultra-low apparent density and high-performance foam concrete material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]

[0028]

[0029] The total mass percentage of the above materials satisfies 100%.

[0030] Put 42.5 ordinary Portland cement, renewable rubber powder, and polypropylene fiber together into the container, and stir evenly to obtain a mixture of type A; mix polycarboxylate high-performance water reducer, hydroxymethyl cellulose ether with the above-mentioned measured water Add 1 / 3 of the water together in the mixer and stir to obtain the B mixture; Pour the commercially available animal glue surfactant (foaming agent) and the remaining 2 / 3 of the water into the foaming machine and stir to foam Type C mixture was obtained; then both mixtures B and C were added to type A mixture, stirred evenly and poured directly into the mold for molding. After molding, the mold was demoulded with natural curing for 3 days, and then cured for 14 days. Finally, the finished product is cut according to the requirements of use. Its apparent density is determined to be about 200kg / m 3...

Embodiment 2

[0032] First measure according to the following mass percentages:

[0033]

[0034] The total mass percentage of the above materials satisfies 100%.

[0035] Put 42.5 Portland cement, mixed material S105 slag powder, polymer styrene-acrylic emulsion, and polypropylene fiber together into the container, and stir evenly to obtain a type A mixture; polycarboxylate water reducer, early strength agent CaCl2, shrinkage reduction The agent hydroxymethyl cellulose ether and 1 / 3 of water are added to another mixer and stirred evenly to obtain a mixture of type B; the animal glue surfactant and 2 / 3 of water are poured into a foaming machine and stirred and foamed to obtain a mixture of C Then add both mixtures B and C to the mixture A, stir evenly and pour it directly into the mold for molding: first pour 10mm thick into the mold, then add a layer of polyethylene film, and then pour 10mm thick, so cycle until the mould is filled, and it can be properly vibrated before adding polyeth...

Embodiment 3

[0037] First measure according to the following mass percentages:

[0038]

[0039]

[0040] The total mass percentage of the above materials satisfies 100%.

[0041] Put 32.5 fly ash cement, vitrified microbeads (porous granular aggregate), renewable rubber powder (polymer), and cellulose fibers into the container together, stir evenly to obtain a mixture of type A; agent, triethanolamine (early strength agent), hydroxymethyl cellulose ether (shrinkage reducer) and 1 / 3 of water are added to another mixer and stirred evenly to obtain a mixture of type B; animal glue surfactant and 2 / 3 Pour the water into the foaming machine to stir and foam to obtain a mixture of type C; then add both mixtures B and C to the mixture of type A, stir well and pour it directly into the mold for molding: first pour about 10mm into the mold thick, and then add a layer of aluminum foil (layered film material), and then pour about 10mm thick, and so on until the mould is filled, and vibrate pr...

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Abstract

The invention relates to an ultra-low apparent density and high-performance foam concrete material and its preparation method. The material comprises the following components by mass: 30%-70% of cement, 0%-30% of an admixture, 0%-30% of a porous particle aggregate, 0.3%-5% of a polymer, 0.3%-3% of a fiber, 0.3%-0.5% of a foaming agent, 0.1%-0.5% of a water reducing agent, 0%-1.5% of an early strength agent, 0.1%-0.5% of a shrinkage reducing agent, 0%-3% of a layered material, and 26%-50% of water. Compared with ordinary foam concrete, the material prepared in the invention has the technical advantages of ultra-low apparent density, small coefficient of heat conductivity, and no dry shrinkage cracking, etc. And compared with current foam polyphenyl boards for exterior wall external thermalinsulation, the material of the invention has the advantage of non-combustion.

Description

technical field [0001] The invention relates to an ultra-low apparent density high-performance foam concrete material and a preparation method thereof, which can be used for heat preservation of external walls, roof heat preservation, non-load-bearing walls and the like. It belongs to the technical field of building materials. technical background [0002] my country is advocating a green economy and a low-carbon economy. The utilization of waste resources, lightweight building materials, low environmental load, thermal insulation and energy saving have become important development directions for today's building materials. Some time ago, the foamed polystyrene board used in the external insulation of building exterior walls, which was vigorously promoted some time ago, caused serious fires in buildings in Beijing, Shanghai, Shenyang and other places due to its flame resistance, resulting in serious personnel and property losses. For this reason, the Ministry of Public Secur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/08
Inventor 马一平
Owner TONGJI UNIV
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