Coal-based solid waste soil stabilizer and preparation method thereof

A soil curing agent and coal-based technology, applied in chemical instruments and methods, soil conditioning materials, agriculture, etc., can solve the problems of increased water reducing agent dosage, shrinkage and cracking of structures, unsatisfactory curing effect, etc., and achieve reactivity Improvement, surface free energy increase, and compensation for shrinkage cracking

Pending Publication Date: 2022-07-01
山西路桥再生资源开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, the output of sulfur-fixed ash has been increasing every year. At present, the sulfur-fixed ash used in soil curing agents is usually made by mixing uniformly with quicklime, activator, early strength agent, silica fume, and polyacrylamide; but in In the actual application process, the curing effect is still not ideal, and the problem of sh

Method used

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  • Coal-based solid waste soil stabilizer and preparation method thereof
  • Coal-based solid waste soil stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] S1 is ground to make the specific surface area of ​​the sulfur-fixed ash 700m 2 / kg.

[0032] The specific surface area of ​​silica fume determined by S2 is 1200m 2 / kg, the mass of silica fume is calculated and weighed according to the mass of solid sulfur ash.

[0033] S3 calculates the mass of two activators according to the mass of the solid sulfur ash: potassium sulfate and sodium hydroxide, and mixes the above two activators evenly in a ratio of 1:1.

[0034] S4 calculates the quality of the superplasticizer according to the quality of the sulfur-fixing ash.

[0035] S5 is based on 50 parts of sulfur-fixing ash, 3 parts of silica fume, 3 parts of activator, 0.1% superplasticizer (calculated according to the mass of sulfur-fixing ash), 0.3% of polyvinyl alcohol fiber (calculated according to the mass of sulfur-fixing ash), The above materials are stirred for 10 to 15 minutes at a rotational speed of 150 to 300 r / min to obtain a mixed powder.

[0036] S6 On the...

Embodiment 2

[0039] S1 is ground to make the specific surface area of ​​the sulfur-fixed ash 700m 2 / kg.

[0040] The specific surface area of ​​silica fume determined by S2 is 1200m 2 / kg, the mass of silica fume is calculated and weighed according to the mass of solid sulfur ash.

[0041] S3 calculates the mass of two activators according to the mass of the solid sulfur ash: potassium sulfate and sodium hydroxide, and mixes the above two activators evenly in a ratio of 1:1.

[0042] S4 calculates the quality of the superplasticizer according to the quality of the sulfur-fixing ash.

[0043] S5 is based on 75 parts of sulfur-fixing ash, 10 parts of silica fume, 4 parts of activator, 0.3% superplasticizer (calculated according to the mass of sulfur-fixing ash), and 0.5% polyvinyl alcohol fiber (calculated according to the mass of sulfur-fixing ash) , the above materials are stirred for 10 to 15 minutes at a rotational speed of 150 to 300 r / min to obtain a mixed powder.

[0044] S6 On t...

Embodiment 3

[0047]S1 is ground to make the specific surface area of ​​the sulfur-fixed ash 700m 2 / kg.

[0048] The specific surface area of ​​silica fume determined by S2 is 1200m 2 / kg, the mass of silica fume is calculated and weighed according to the mass of solid sulfur ash.

[0049] S3 calculates the mass of two activators according to the mass of the solid sulfur ash: potassium sulfate and sodium hydroxide, and mixes the above two activators evenly in a ratio of 1:1.

[0050] S4 calculates the quality of the superplasticizer according to the quality of the sulfur-fixing ash.

[0051] S5 According to 80 parts of sulfur-fixing ash, 15 parts of silica fume, 5 parts of activator, 0.5% of superplasticizer, and 0.6% of polyvinyl alcohol fiber, the above materials are stirred at a speed of 150-300r / min for 10-15min , have mixed powder.

[0052] S6 On the basis of S5, the subgrade improvement soil test is carried out according to the 10% content mixed with soil (external mixing method...

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Abstract

The invention belongs to the technical field of soil solidification, and relates to a coal-based solid waste soil solidifying agent and a preparation method thereof. The problem that when the fluidized bed combustion ash is used as a soil stabilizer, a structure is prone to shrinkage and cracking after curing is solved. The soil stabilizer comprises the following components in parts by weight: 50-80 parts of fluidized bed combustion ash, and 5-15% of silica fume, 3-5% of sulfate and sodium hydroxide, 0.1-0.5% of a water reducing agent and 0.3-0.6% of polyvinyl alcohol fiber which account for the mass percent of the fluidized bed combustion ash. The treated materials are stirred for 10-15 min at the rotating speed of 150-300 r/min, and mixed powder is obtained; under the action of the exciting agent, the secondary hydration reaction process of the mineral admixture and calcium hydroxide is accelerated, so that hydration products are crossed and overlapped with one another to form a compact network structure system, and a structure is prevented from shrinking and cracking.

Description

technical field [0001] The invention belongs to the technical field of soil solidification, and relates to a coal-based solid waste soil solidifying agent and a preparation method. Background technique [0002] Sulfur-fixing ash is an industrial solid waste produced by the use of circulating fluidized bed boiler technology with inferior fuels such as coal gangue, lignite, and coal slime. A substantial increase in the amount of slag has come. Desulfurization ash and slag are piled up in large quantities, which will pollute the environment, cause ecological damage, and affect human health while occupying a large amount of land. The environmental protection tax generated by solid waste discharge has caused a huge economic burden to enterprises. Therefore, the resource utilization of sulfur-fixing ash and slag needs to be expanded urgently. [0003] The chemical composition of sulfur-fixing ash contains a large amount of silicon-alumina oxide, free calcium oxide and sulfur tr...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K103/00
CPCC09K17/40C09K2103/00
Inventor 谢俞超张宏米建明马金虎李冬生程志白万玉郝松梅杨毅苏冬萍李成帅任小荣张璐陈通程飞杨妮娜李小红常连斌张孝林
Owner 山西路桥再生资源开发有限公司
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