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Sand fixation method of green degradable inorganic sand fixation material

A sand-fixing method and inorganic technology, applied in the directions of organic fertilizers, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of poor stability, wind erosion, poor permeability, etc., and achieve the effect of reducing impact and reducing environmental pollution.

Inactive Publication Date: 2017-05-31
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Emulsified asphalt is currently the most widely used chemical sand-fixing material in the world. This type of sand-fixing agent is low in cost and has a wide range of raw materials, but it is prone to aging, wind erosion, poor permeability, and poor stability. It can only last for 2 to 3 years. time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Manage a desert. Dry mix red mud, fly ash, composite slag powder, 42.5 ordinary Portland cement, and desulfurized gypsum at a ratio of 2.5:2.3:3.5:1:0.7, and then use a weight ratio concentration of 0.75 for sand-fixing slurry Add water and stir evenly, crush and sieve coal gangue into 0.5-1mm and 1-2mm, mix with aeolian sand (<0.5mm) at a ratio of 1:1:1 and add to the slurry, mix evenly in a concrete mixer, and transport to Spray on the surface of the sand in a parallel strip or well-shaped grid layout at a designated location to form a 12cm-thick consolidation layer.

Embodiment 2

[0026] In order to prevent dunes from migrating, sand-fixing construction will be carried out on the dunes. Dry-mix calcium silicate slag, fly ash, composite slag powder, 32.5 ordinary Portland cement, and desulfurized gypsum at a ratio of 0.5:1.55:1.5:1:0.45, and then use a weight ratio of 0.85 for sand-fixing slurry Add water and stir evenly, crush and sieve coal gangue into 0.5-1mm and 1-2mm, mix with aeolian sand (<0.5mm) at a ratio of 1:1:2 and add it to the slurry and mix evenly in a concrete mixer truck , transported to the designated place, and sprayed on the surface of the sand in the layout of parallel strips or well-shaped squares to form a 15cm thick consolidation layer.

Embodiment 3

[0028] The preparation method of green degradable inorganic sand-fixing material, the steps are as follows: 1) mix red mud, fly ash, composite slag powder, 32.5 ordinary Portland cement, and desulfurized gypsum in a ratio of 2:3.5:3:1:0.9 2) add water according to the weight ratio concentration of 0.8 sand-fixing slurry and stir evenly; 3) crush and sieve coal gangue into two particle sizes of 2.8-4.75mm and 1-2.8mm, and crush and sieve iron tailings into 0.5-1mm particle size, aeolian sand (<0.5mm), mix the aggregates of these four particle sizes at 1:1:1:1 evenly; 4) Mix the mixed coal gangue and iron tailings aeolian sand 5) Transport the sand-fixing material to the designated place, and spray it on the surface of the sand in the layout of parallel strips or well-shaped squares to form a 12cm-thick solid knot layer.

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Abstract

The invention relates to a sand fixation method of a green degradable inorganic sand fixation material, belonging to the field of environmental protection. The inorganic sand fixation material is prepared by mixing calcium silicate slag, fly ash, industrial mineral slag powder, gypsum, cement and solid aggregate used as main raw materials. The sand fixation material and water are mixed to prepare a sand fixation slurry; and the sand fixation slurry is sprayed or spread on sand soil to form a solidifying layer on the sand soil surface. The solidifying layer can satisfy the mechanical property requirements for fixing traveling dunes. After the sand fixation layer is laid, the sand fixation region is subjected to soil improvement and plant growth, so that the sand fixation layer can be degraded into substances which are nontoxic and harmless to the environment within 1-5 years, thereby obtaining the soil components and lowering the influence of artificial buildings on the desert ecological environment. After the sand fixation material reacts with water, no toxic component resides, and thus, the sand fixation material has the advantages of high safety and no secondary pollution. Besides, abundant industrial solid wastes are doped to lower the influence of solid waste piling on the environment; and the method has the advantages of low cost, simple construction technique and high practicality, and is applicable to related fields of desertification control and the like.

Description

technical field [0001] The invention belongs to the technical field of sand prevention and sand fixation, and relates to a green and environment-friendly inorganic sand fixation material and a preparation method thereof, in particular to a method of using coal-based solid waste with large output but low utilization rate and sand widely distributed in nature and rich in reserves. The main component is a high-efficiency, low-cost, environmentally friendly slurry sand-fixing material that is compounded with water and can be degraded into non-toxic and harmless substances within 1-5 years, and a preparation method thereof. Background technique [0002] my country is the country with the largest desertification and sandification area in the world. According to the fourth national desertification and sandification status bulletin, by the end of 2009, the total area of ​​desertification land in my country was 2.6237 million square kilometers, accounting for 27.33% of the total land ...

Claims

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Application Information

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IPC IPC(8): C09K17/02E02D3/00C09K105/00
CPCC09K17/02C09K2105/00E02D3/00
Inventor 刘晓明彭丹丹杨志杰苍大强陈杨陈蛟龙张娜
Owner UNIV OF SCI & TECH BEIJING
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