Soil stabilizer based on copper slag as well as preparation and application method of soil stabilizer

A soil curing agent and copper slag technology, applied in the field of building materials, can solve the problems of poor workability of slag, poor economic and environmental benefits, easy cracking, etc., and achieve poor chemical stability, good curing effect, and the effect of enhancing alkalinity.

Active Publication Date: 2021-12-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent has problems such as poor workability, severe shrinkage, and easy cracking of alkali-activated or sulfate-activated slag, and the reused resources only include granulated blast furnace slag and carbide slag, resulting in poor economic and environmental benefits

Method used

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  • Soil stabilizer based on copper slag as well as preparation and application method of soil stabilizer
  • Soil stabilizer based on copper slag as well as preparation and application method of soil stabilizer
  • Soil stabilizer based on copper slag as well as preparation and application method of soil stabilizer

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preparation example Construction

[0045] The preparation method of the above-mentioned soil curing agent comprises: stirring and mixing water glass, water reducing agent, shrinkage reducing agent and water evenly to obtain a solution; mixing copper slag powder, phosphogypsum, ceramic waste mold gypsum, volcanic rock powder in Tibet, carbide slag and The aluminum slime was mixed and dry mixed for 3 minutes to obtain a dry mix.

[0046] The method for using the above-mentioned soil stabilizer includes dry mixing the dry mixture with the soil for 5 minutes, then adding the solution and stirring for 10 minutes to obtain the stabilized soil; wherein the doping amount of the soil stabilizer is 10%-30% of the mass of the soil.

Embodiment

[0049] A soil curing agent based on copper slag, the preparation method of which is as follows: according to the distribution ratio of each component in Table 1, water glass, polycarboxylate water reducing agent, shrinkage reducing agent and water are stirred and mixed evenly to obtain a solution, and the copper Slag powder, non-calcined phosphogypsum, ceramic waste mold gypsum, Tibet volcanic rock powder, carbide slag and aluminum mud were mixed and dry mixed for 3 minutes to obtain a dry blend.

[0050] The average particle size of the copper slag powder used is 15 μm, the mass content of FeO is 28%, and the SiO 2 The mass content is 35%, Al 2 o 3 The mass content is 5%, and the CaO mass content is 19%. Non-calcined phosphogypsum is obtained by drying the original phosphogypsum at 60°C for 24 hours. The average particle size of the non-calcined phosphogypsum is 50 μm, and CaSO 4 The mass content is 68%. The specific surface area of ​​ceramic waste mold plaster is 300m 2...

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Abstract

The invention relates to a soil stabilizer based on copper slag as well as a preparation and application method of the soil stabilizer. The soil stabilizer comprises a solution and a dry blend, wherein the solution comprises sodium silicate, a polycarboxylic acid water reducer, a shrinkage reducing agent and water, and the dry blend comprises copper slag powder, ardealite, ceramic waste mold gypsum, volcanic rock powder, carbide slag and aluminum mud; and during use, the dry blend and soil are subjected to dry mixing for 5 min, then a solution is added, stirring is conducted for 10 min, and solidified soil is obtained. Compared with the prior art, industrial by-products such as copper slag, ardealite, ceramic waste mold gypsum, carbide slag and aluminum mud can be effectively recycled, pollution to the environment is reduced, volcanic rock powder in the Tibet region is recycled, the cost is reduced, and compared with materials such as cement or lime in a traditional soil stabilizer, the soil stabilizer has better economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a copper slag-based soil curing agent and a preparation and use method thereof. Background technique [0002] Copper slag is an industrial by-product produced in the process of smelting metal copper, and about 2.2 tons of copper slag is produced for every 1 ton of copper produced. In 2018, my country's refined copper output was about 9.03 million tons, and the resulting copper slag reached 20 million tons. The stockpiling of copper slag not only takes up a lot of land, but also causes serious pollution to water sources and soil due to the heavy metal components contained in it. Therefore, how to manage and realize the resource reuse of copper slag is of great significance to the sustainable development of economy, resources and environment in copper smelting areas. [0003] Soil stabilizer is a material that changes the contact surface between soil particles through ph...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B7/12C04B18/04C04B18/14C04B22/14C04B24/24C04B24/32C04B103/30
CPCC04B28/26C04B18/144C04B18/0418C04B7/12C04B22/146C04B22/144C04B18/04C04B24/32C04B24/24C04B2103/302C04B2111/00732C04B2201/50Y02W30/91
Inventor 孙振平闫珠华葛好升张挺穆帆远
Owner TONGJI UNIV
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