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Chemical sand fixing agent and preparation method thereof

A sand-fixing agent and chemical technology, applied in the field of new chemical sand-fixing agents, can solve the problems of poor anti-aging property of water glass, poor sand-fixing effect, polluted environment, etc., and achieve the effects of good sand-fixing effect, convenient construction and simple preparation.

Inactive Publication Date: 2011-07-20
NORTHWEST RES INST CO LTD OF C R E C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they have problems such as poor sand-fixing effect, troublesome preparation, and environmental pollution.
There are also chemical sand-fixing agents with water glass as the main component, but they are often just simple compounding, which cannot solve the shortcomings of water glass's poor aging resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: In terms of mass percentage, add 0.1% sorbitol and 1.5% lithium carbonate to 48.1% water, stir until it is completely dissolved, then add 50% water glass (modulus 3.0) to fully react for 4 hours, Then add 0.1% polyacrylamide and continue to react for 1.5 hours to obtain modified water glass, and finally add 0.2% sodium carboxymethyl cellulose and stir evenly to obtain the sand-fixing agent of the present invention. The whole reaction process was carried out at normal temperature.

[0016] After research and testing: the sand mold sample made of this sand-fixing agent was aged for 7 days at room temperature, and its unconfined compressive strength was measured to be 0.34 MPa; aged at 70 degrees Celsius for 7 days, its unconfined compressive strength was measured to be 0.30 MPa; frozen at minus 20 degrees Celsius for 7 days, the unconfined compressive strength was measured to be 0.28 MPa. TGA test shows that the thermal weight loss is 8.7% at 0-700 degrees Ce...

Embodiment 2

[0017] Example 2: In terms of mass percentage, add 0.08% sorbitol and 1.2% lithium carbonate to 58.42% water, stir until it is completely dissolved, then add 40% water glass (modulus 3.3) to fully react for 3 hours, Then add 0.1% polyacrylamide and continue to react for 1 hour to obtain modified water glass, and finally add 0.2% sodium carboxymethyl cellulose and stir evenly to obtain the sand-fixing agent of the present invention. The whole reaction process was carried out at normal temperature.

[0018] After research and testing: the sand mold sample made of this sand fixing agent was aged for 7 days at room temperature, and its unconfined compressive strength was measured to be 0.32 MPa; aged at 70 degrees Celsius for 7 days, its unconfined compressive strength was measured to be 0.28 MPa Pa; frozen at minus 20 degrees Celsius for 7 days, the unconfined compressive strength was measured to be 0.26 MPa. TGA test shows that the thermal weight loss is 8.5% at 0-700 degrees...

Embodiment 3

[0019] Example 3: In terms of mass percentage, add 0.12% sorbitol and 1.8% lithium carbonate to 37.78% water, stir until it is completely dissolved, then add 60% water glass (modulus 2.8) to fully react for 5 hours, Then add 0.1% polyacrylamide and continue to react for 2 hours to obtain modified water glass, and finally add 0.2% sodium carboxymethylcellulose and stir evenly to obtain the sand-fixing agent of the present invention. The whole reaction process was carried out at normal temperature.

[0020] After research and testing: the sand mold sample made of this sand fixing agent was aged for 7 days at room temperature, and its unconfined compressive strength was measured to be 0.33 MPa; aged at 70 degrees Celsius for 7 days, its unconfined compressive strength was measured to be 0.28 MPa; frozen at minus 20 degrees Celsius for 7 days, the unconfined compressive strength was measured to be 0.27 MPa. TGA test shows that the thermal weight loss is 8.6% at 0-700 degrees Ce...

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Abstract

The invention provides a chemical sand fixing agent which is prepared from the following components in percentage by mass: 40-60% of water glass of which the modulus is 2.8-3.3, 0.08-0.12% of sorbitol, 1.2-1.8% of lithium carbonate, 0.1% of polyacrylamide and 0.2% of sodium carboxymethyl cellulose. The preparation method comprises the following steps: carrying out chemical modification on the water glass, and reasonably compounding the water glass with organic high-molecular materials. Compared with the traditional water glass sand fixing agent, the chemical sand fixing agent provided by the invention has the characteristics of favorable sand fixing effect, no environment pollution, high ageing resistance and the like, and is easy to prepare and convenient for construction. The sand mold sample test result indicates that the sand fixing agent has favorable ageing resistance, freeze thawing resistance and wind erosion resistance, and the unconfined compressive strength is greater than or equal to 0.2 megapascal. The invention has a popularization value in the field of control of desertification.

Description

technical field [0001] The invention relates to a chemical sand-fixing agent, in particular to a novel chemical sand-fixing agent which is chemically modified and compounded with organic macromolecular materials. Background technique [0002] my country is one of the countries in the world with large desert area, wide distribution and serious desertification hazards. Especially in recent years, with the accelerated development of land desertification, the occurrence frequency of sudden wind and sand disasters - strong sandstorms is getting higher and higher. Existing sand prevention and control measures are divided into mechanical, biological and chemical three. Among various sand control measures, biological sand control is a protective measure that can cure the root cause, but it has strict requirements on the regional environment; mechanical sand control costs are high and construction is troublesome; chemical sand fixation has low cost, quick results, adaptability In r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K105/00
Inventor 蒋富强熊治文李凯崇薛春晓杨柳唐瑜
Owner NORTHWEST RES INST CO LTD OF C R E C
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