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Alkali activated fly ash/slag foam concrete and preparation method thereof

A technology of foam concrete and fly ash, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problems of high energy consumption, large capacity, and high thermal conductivity of foam concrete, and achieve high mechanical properties and acid and alkali corrosion resistance Good thermal conductivity, small thermal conductivity, and good heat insulation/heat preservation performance

Active Publication Date: 2017-07-14
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention effectively utilizes industrial solid waste and solves the problems of high energy consumption, large bulk density and high thermal conductivity of existing foam concrete

Method used

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  • Alkali activated fly ash/slag foam concrete and preparation method thereof
  • Alkali activated fly ash/slag foam concrete and preparation method thereof
  • Alkali activated fly ash/slag foam concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A kind of alkali-activated fly ash / slag foam concrete, its composition and volume percentage are as follows:

[0048] Fly ash: 10.77%, slag: 4.62%, alkali activator: 18.11%, foam: 66.50%.

[0049] Wherein, the alkali activator is a mixture of sodium hydroxide and water glass. The dosage of sodium hydroxide is 7.68g; the dosage of water glass is 82.36g; the modulus of the alkali activator is 1.5; the mass ratio of water / ash body is 0.4.

[0050] Preparation method: first, pour fly ash and slag into a mixer and stir evenly; second, add alkali activator in proportion and stir to prepare slurry; at the same time, dilute foaming agent and water at a ratio of 1:30, and adjust Vacuum foaming machine, foaming by physical method to prepare dense and stable foam; weigh the required volume of foam and add it, first stir slowly for 3', then stir quickly for 30" until the foam is evenly dispersed in the slurry, and made Freshly mixed slurry; finally, inject the slurry into a mold,...

Embodiment 2

[0054] A kind of alkali-activated fly ash / slag foam concrete, its composition and volume percentage are as follows:

[0055] Fly ash: 10.77%, slag: 4.62%, alkali activator: 19.93%, foam: 64.68%.

[0056] Wherein, the alkali activator is a mixture of sodium hydroxide and water glass. The dosage of sodium hydroxide is 7.68g; the dosage of water glass is 82.36g; the modulus of the alkali activator is 1.5; the mass ratio of water / ash body is 0.45.

[0057] Preparation method: first, pour fly ash and slag into a mixer and stir evenly; second, add alkali activator in proportion and stir to prepare slurry; at the same time, dilute foaming agent and water at a ratio of 1:30, and adjust Vacuum foaming machine, foaming by physical method to prepare dense and stable foam; weigh the required volume of foam and add it, first stir slowly for 3', then stir quickly for 30" until the foam is evenly dispersed in the slurry, and made Freshly mixed slurry; finally, inject the slurry into a mold...

Embodiment 3

[0060] A kind of alkali-activated fly ash / slag foam concrete, its composition and volume percentage are as follows:

[0061] Fly ash: 4.62%, slag: 10.77%, alkali activator: 18.11%, foam: 66.50%.

[0062] Wherein, the alkali activator is a mixture of sodium hydroxide and water glass. The dosage of sodium hydroxide is 7.68g; the dosage of water glass is 82.36g; the modulus of the alkali activator is 1.5; the mass ratio of water / ash body is 0.4.

[0063] Preparation method: first, pour fly ash and slag into a mixer and stir evenly; second, add alkali activator in proportion and stir to prepare slurry; at the same time, dilute foaming agent and water at a ratio of 1:30, and adjust Vacuum foaming machine, foaming by physical method to prepare dense and stable foam; weigh the required volume of foam and add it, first stir slowly for 3', then stir quickly for 30" until the foam is evenly dispersed in the slurry, and made Freshly mixed slurry; finally, inject the slurry into a mold,...

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Abstract

The invention discloses an alkali activated fly ash / slag foam concrete and a preparation method thereof. The foam concrete is composed of the following components in percentage by weight for each cubic meter: 4.6 to 10.8% of fly ash, 4.6 to 13.5% of slag, 17.4 to 20.5% of alkali activator, and 60.3 to 75.9% of foams. The foam concrete is a gel system composed of aluminosilicate polymer having a three dimensional net structure composed of AlO4 and SiO4 tetrahedral structural units and aluminum-containing hydrated calcium silicate gel. The industrial solid wastes are effectively utilized, about 80% of emission of carbon dioxide is reduced, and moreover, the foam concrete is green, environment-friendly, and light, and has a small heat conductivity coefficient. After 28d of standard maintenance of the concrete, the measured dry volume density is 300 to 700 kg / m<3>, and the heat conductivity coefficient is 0.08-0.15 W / (m.K). The foam concrete is a light and thermal insulation building material.

Description

technical field [0001] The invention relates to a building thermal insulation material and a preparation method thereof, in particular to an alkali-activated fly ash / slag foam concrete and a preparation method thereof. Background technique [0002] Energy shortage and global warming are major issues facing all mankind at present. According to the data of the "World Energy Statistical Yearbook" released by the British company BP, my country's primary energy consumption has jumped from 1764Mtoe (million tons of oil equivalent) in 2006. To 2972Mtoe in 2014, the increase reached 68%. Among all energy consumption, building energy consumption accounts for 33% of the total energy consumption of primary energy in my country, occupying a considerable proportion. Among all building energy consumption, heating and air-conditioning energy consumption accounts for about 60-70% of my country's total building energy consumption, which is 2-3 times that of developed countries with similar l...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/10
CPCC04B28/006C04B2111/00017C04B2201/20C04B2201/32C04B2201/50C04B18/08C04B18/141C04B22/062C04B12/04C04B24/14C04B38/106
Inventor 马玉玮赵德霞王桂生胡捷傅继阳刘爱荣吴玖荣
Owner GUANGZHOU UNIVERSITY
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