Geopolymer foam concrete and preparation method thereof

A foamed concrete and geopolymer technology, used in ceramic products, solid waste management, other household appliances, etc., can solve the problems of easy cracking, energy consumption, high thermal conductivity, low strength, etc., and achieve fast setting time, setting and hardening. , Good casting stability

Inactive Publication Date: 2017-09-22
CHANGZHOU YINENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a geopolymer foam concrete and its preparation method to solve the technical problems of existing foam concrete such as low strength, high thermal conductivity, large bulk density, easy cracking and high energy consumption

Method used

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  • Geopolymer foam concrete and preparation method thereof
  • Geopolymer foam concrete and preparation method thereof
  • Geopolymer foam concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of geopolymer foam concrete, its component and mass percent are as follows:

[0033] Steel slag powder 26.0%, modified red mud 5%, modified metakaolin 26.30%, ground slag powder 3.50%, red mud attached liquid 4.10%, foaming agent 1.20%.

[0034] Preparation method: Stir and mix dry materials such as steel slag powder, modified red mud, modified metakaolin, and finely ground slag powder evenly, add alkali activator and water and stir to make a uniform slurry; at the same time, mix foaming agent and water by 1 : Dilute to 15, use high-speed mixer to foam; then mix the prepared foam into the slurry according to the volume ratio, stir for 2.5-3min until the foam is evenly distributed in the slurry; finally injection molding, demoulding after 24h, standard maintenance 28d test Dry bulk density, compressive strength, flexural strength.

[0035] Test result: dry bulk density 1049kg / m 3 , the compressive strength is 19.3MPa, and the flexural strength is 3.8MPa.

Embodiment 2

[0037] A kind of geopolymer foam concrete, its component and mass percent are as follows:

[0038] Steel slag powder 30.0%, modified red mud 7.50%, modified metakaolin 30.50%, ground slag powder 4.50%, red mud attached liquid 3.62%, foaming agent 1.16%.

[0039] Preparation method: Stir and mix steel slag powder, modified red mud, modified metakaolin, ground slag powder, etc., and add alkali activator and water to make a uniform slurry; Dilute and foam with a high-speed mixer; then mix the prepared foam into the slurry according to the volume ratio, and stir for 2.5-3 minutes until the foam is evenly distributed in the slurry; finally injection molding, demoulding after 24 hours, standard curing 28d to measure the dry volume Density, compressive strength, thermal conductivity.

[0040] Test result: dry volume density 730kg / m 3 , the compressive strength is 4.2MPa, and the thermal conductivity is 0.132W / (m·K).

Embodiment 3

[0042] A kind of metakaolin base polymer foam concrete, its component and mass percentage are as follows:

[0043] Steel slag powder 30.0%, modified red mud 7.50%, modified metakaolin 30.50%, ground slag powder 4.50%, red mud attached liquid 3.62%, foaming agent 1.16%.

[0044] Preparation method: Stir and mix dry materials such as steel slag powder, modified red mud, modified metakaolin, and finely ground slag powder evenly, add alkali activator and water and stir to make a uniform slurry; at the same time, mix foaming agent and water by 1 : Dilute to 15, use high-speed mixer to foam; then mix the prepared foam into the slurry according to the volume ratio, stir for 2.5-3min until the foam is evenly distributed in the slurry; finally injection molding, demoulding after 24h, standard curing 28d test Dry bulk density, compressive strength.

[0045] Test result: dry volume density 453kg / m 3 , the compressive strength is 1.5MPa, and the flexural strength is 0.6MPa.

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Abstract

The invention discloses geopolymer foam concrete and a preparation method thereof. By means of the method, a large number of industrial waste and crop straw can be used, the strength of foam concrete is improved and cracking of the foam concrete is prevented. The method includes the steps that 25%-45% of steel slag powder, 0%-12.5% of modified red mud, 25%-45% of modified metakaolin, 0%-25% of fly ash, 0.5%-5% of coagulant and 1%-6% of exciting agent are mixed and stirred evenly to obtain material slurry; at the same time, a foaming agent is diluted with water according to the ratio of 1:15, and a vacuum foaming machine or a high-speed stirrer is used for preparing dense and stable foam; according to the density design requirement, obtained foam is mixed with the uniformly stirred material slurry according to the volume ratio, stirring and foam mixing are conducted, and geopolymer foam concrete is obtained, wherein the volume ratio of the foam to the material slurry is (1-4):1, and stirring is conducted for 2.5-3.5 min until the foam is evenly dispersed in the material slurry.

Description

technical field [0001] The invention relates to a foam concrete material and a preparation method thereof, in particular to a geopolymer foam concrete material and a preparation method thereof. Background technique [0002] After decades of rapid development, foam foam concrete is widely used in energy-saving insulation, bridge abutment filling, mine backfilling and other fields. At present, the cementitious materials used in the preparation of foamed concrete are mainly cement, magnesia, and gypsum. Among them, cement-based foamed concrete is the most widely used. [0003] In engineering practice, metakaolin is usually used as an external admixture to improve the cohesion and water retention of foamed concrete. For example, the publication number is CN101353265A "foam concrete product", but its main cementitious material is still Portland cement or ordinary Portland cement. The publication number is CN102701656A "Metakaolin base polymer foam concrete and its preparation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/00C04B18/14C04B18/04C04B18/24
CPCC04B18/0409C04B18/142C04B18/24C04B28/006C04B38/106C04B2201/20C04B2201/32C04B2201/50C04B38/0067C04B14/106C04B22/0006C04B22/0046C04B24/14C04B24/34Y02P40/10Y02W30/91
Inventor 尹哲学庞华果江新卫靳洪波程远志高波其他发明人请求不公开姓名
Owner CHANGZHOU YINENG TECH
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