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A chemically activated sulfur-fixing ash-slag-based foam lightweight soil

A technology of foam light soil and sulfur-fixed ash, which is applied in the field of building materials, can solve the problems of restricting the large-scale utilization of sulfur-fixed ash, poor workability, and low chemical activity, so as to promote utilization and development and reduce damage , improve the effect of lower intensity

Active Publication Date: 2021-02-26
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emission of solid waste sulfur-fixed ash produced by circulating fluidized bed combustion technology is much higher than that of fly ash produced by pulverized coal boilers, and the untreated sulfur-fixed ash has rough particles, loose and porous surface, and low chemical activity. , high sulfur and high calcium and other physical and chemical properties, applied to cement-based materials will cause poor workability and later expansion problems, which restricts the large-scale utilization of sulfur-fixed ash

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0038] In some embodiments, the preparation method of the sulfur-fixed ash-based foam lightweight soil includes the following steps:

[0039] (1) Weigh the sulfur-fixed ash, fly ash, cement and foam raw materials of a certain mass portion;

[0040] (2) Stir the sulfur-fixed ash, fly ash, and cement at a speed of 1300 to 1500 rpm for 3 to 5 minutes in step (1);

[0041] (3) Add water to the pre-stirred dry material in step (2), and stir at a speed of 1300-1500 rpm for 3-5 minutes;

[0042] (4) Add the weighed activator into the mixed slurry obtained in step (3), and stir at a speed of 1300-1500 rpm for 3-5 minutes.

[0043] (5) Dilute the weighed foaming agent to 40 to 50 times and foam it by high-pressure air method, then add the foam to the mixed slurry obtained in step (4), and stir at a speed of 600 to 800rpm 2~3min.

[0044] (6) Adjust the density of the mixed slurry to 550-650g / L and test the flow value until the flow value reaches 18±1cm.

[0045] (7) Pour the obtain...

Embodiment 1

[0052] A preparation method of sulfur-fixed ash slag-based foam light soil, comprising the following steps:

[0053] (1) Weigh 116 parts of sulfur-fixing ash, 39 parts of fly ash, 260 parts of cement, 0.5 part of activator, 186 parts of water and 0.7 part of blowing agent;

[0054] (2) Stir the sulfur-fixed ash, fly ash, and cement for 3 minutes at a speed of 1400 rpm in step (1);

[0055] (3) Add water to the pre-stirred dry material in step (2), and stir for 3 minutes at a speed of 1400 rpm;

[0056] (4) Add the activator to the cement slurry stirred in step (3), and stir for 3 minutes at a speed of 1400 rpm;

[0057] (5) After diluting the blowing agent to 40 times, the foam was foamed by high-pressure air method, and then, the foam was added to the mixed slurry obtained in step (3), and stirred at a speed of 700 rpm for 2 min.

[0058] (6) Adjust the density of the mixed slurry to 600g / L and test the flow value until the flow value reaches 18±1cm.

[0059] (7) Pour the ...

Embodiment 2

[0062] A preparation method of sulfur-fixed ash slag-based foam light soil, comprising the following steps:

[0063] (1) Weigh 101 parts of sulfur-fixing ash, 34 parts of fly ash, 275 parts of cement, 191 parts of water, 0.5 part of activator and 0.7 part of blowing agent;

[0064] (2) Stir the sulfur-fixed ash, fly ash, and cement for 3 minutes at a speed of 1400 rpm in step (1);

[0065] (3) Add water to the pre-stirred dry material in step (2), and stir for 3 minutes at a speed of 1400 rpm;

[0066] (4) Add the activator to the cement slurry stirred in step (3), and stir for 3 minutes at a speed of 1400 rpm;

[0067] (5) After diluting the blowing agent to 40 times, the foam was foamed by high-pressure air method, and then, the foam was added to the mixed slurry obtained in step (3), and stirred at a speed of 700 rpm for 2 min.

[0068] (6) Adjust the density of the mixed slurry to 600g / L and test the flow value until the flow value reaches 18±1cm.

[0069] (7) Pour the ...

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Abstract

The invention relates to a chemically stimulated sulfur-fixing ash-based foam light soil, which is made of the following raw materials in parts by mass: 88-165 parts of sulfur-fixing ash, 260-293 parts of cement, and fly ash 29-55 parts, 0.4-0.5 parts of activator, 0.7-0.8 parts of foaming agent and 180-190 parts of water. The present invention applies solid waste sulfur-fixed ash from thermal power plants to foam light soil for the first time, provides a feasible method for solving the storage problem of sulfur-fixed ash, and promotes the utilization of circulating fluidized bed combustion, a clean energy technology and development. The present invention adopts the mixing of fly ash and sulfur-fixed ash, which can reduce the expansibility of sulfur-fixed ash-based light soil and advance the expansion stability period of sulfur-fixed ash-based light soil, and reduce the impact caused by the expansibility of sulfur-fixed ash. Damage caused by foamy light soil.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a chemically excited sulfur-fixing ash-based foam lightweight soil. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Foam light soil is a lightweight engineering material with a large number of closed pores obtained by adding the foam group obtained by foaming with a foaming agent into the cementitious material and curing it. It has the advantages of light weight, good integrity, adjustable strength and density, high fluidity, good heat insulation, sound insulation, waterproof performance, and self-support after solidification. The difference in settlement of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B38/10
CPCC04B28/02C04B38/10C04B2201/50C04B18/064C04B18/08C04B24/122
Inventor 蒋红光姚占勇薛志超侯智坚迟浩然姚凯胡艳秋梁明张吉哲
Owner SHANDONG UNIV
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