Barium slag construction material and preparation method thereof

A technology of building materials and barium slag, which is applied in the field of barium slag building material preparation, can solve the problems of insufficient environmental safety considerations, large barium slag stockpile, high cost of barium slag, etc., achieve low cost, high utilization rate, and reduce production costs Effect

Inactive Publication Date: 2018-10-12
DONGGUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large stockpiles of barium slag and pollute the environment, and at the same time, solve the problems of high cost and insufficient consideration of environmental safety in the process of recycling barium slag, and provide a barium slag with high doping amount and low cost resourceful method

Method used

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  • Barium slag construction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 Shown, a kind of preparation method of barium slag building material, the step comprises:

[0044] (1) Stabilization and activation of barium slag: 5000g of barium slag, 800g of fly ash, 1500g of slag, 1500g of quicklime, 200g of calcium sulfate, and 100g of iron sulfate are fully mixed, and placed in a ball mill for 0.5h;

[0045] (2) Fully mix the mixture obtained in step (1) with 900g of cement, add 2000g of water and stir, add 50g of lignosulfonate water reducer, and mix the materials evenly to obtain the barium slag building material slurry;

[0046] (3) Molding: Pour the slurry obtained in step (2) into the mold, fully oscillate for molding, and remove the mold after curing for 12 hours.

[0047] The above formula, after testing, has a 7-day compressive strength of 9.37MPa and a 28-day compressive strength of 20.41MPa, and the leaching toxicity of barium ions is less than 2mg / L.

Embodiment 2

[0049] A preparation method of barium slag building material, the steps comprising:

[0050] (1) Stabilization and activation of barium slag: 3000g of barium slag, 1700g of fly ash, 2500g of slag, 2000g of quicklime, 200g of calcium sulfate, and 100g of aluminum sulfate are fully mixed, and placed in a vertical mill for 1 hour;

[0051] (2) Fully mix the mixture obtained in step (1) with 500g of cement, add 4000g of water and stir, add 100g of polycarboxylate superplasticizer, and mix the materials evenly to obtain the barium slag building material slurry;

[0052] (3) Molding: Pour the slurry obtained in step (2) into the mold, fully oscillate for molding, and remove the mold after curing for 12 hours.

[0053] The above formula, after testing, has a 7-day compressive strength of 4.25 MPa and a 28-day compressive strength of 9.51 MPa, and the leaching toxicity of barium ions is less than 2 mg / L.

Embodiment 3

[0055] A preparation method of barium slag building material, the steps comprising:

[0056] (1) Stabilization of barium slag and activation of activity: After fully mixing 6500g of barium slag, 500g of fly ash, 500g of slag, 2000g of quicklime, 200g of calcium sulfate and 20g of ferrous sulfate, they were placed in a Raymond mill and mixed for 0.2 h;

[0057] (2) Fully mix the mixture obtained in step (1) with 1480g of cement, add 3000g of water and stir, add 100g of polycarboxylate superplasticizer, and mix the materials evenly to obtain the barium slag building material slurry;

[0058] (3) Molding: Pour the slurry obtained in step (2) into the mold, fully oscillate to form, and cure for 6 hours to remove the mold. After demoulding, it is naturally cured without steaming.

[0059] The above formula, after testing, has a 7-day compressive strength of 8.14MPa and a 28-day compressive strength of 18.82MPa, and the leaching toxicity of barium ions is less than 2mg / L.

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Abstract

The invention provides a barium slag construction material. The barium slag construction material is prepared from, in parts by weight: 30-65% of barium slag, 4-20% of coal ash, 4-25% of mineral wasteresidue, 8-20% of quick lime, 2-5% of calcium sulfate, 0.2-1% of sulfate, 5-15% of cement and 0.2-1.5% of water reducing agent. Barium slag, coal ash, mineral waste residue, quick lime, calcium sulfate and sulfate are subjected to mixing grinding after being blended, the mixture obtained after mixing grinding is sufficiently mixed with water, the water reducing agent and cement to be uniform, slurry is obtained, then slurry is poured into a mold, the mold is sufficiently vibrated and formed, then demolding is conducted after maintenance is conducted for 6-24 hours, and the barium slag construction material is obtained through natural non-steam curing after demolding is completed. The barium slag utilization rate is high, the cost is low, the technology is simple, the construction materialand the preparation method provided by the invention solve the difficult problems that the strength of barium slag is low and the safety is poor when barium slag serves as the construction material,and meanwhile solves the problems that the storage volume of existing barium slag is large, the environment is polluted, the cost is high in the recycling process, and the environmental safety is notsufficiently considered.

Description

technical field [0001] The invention relates to the field of building material preparation, in particular to a method for preparing barium slag building material. Background technique [0002] Barium slag refers to the solid waste discharged during the production of barium salt. According to statistics, at present, the cumulative stockpiles of various types of barium slag in my country have exceeded 10 million tons. Barium slag mainly contains acid-soluble barium and water-soluble barium. Especially the leaching amount of barium ions in the barium slag except barium sulfate is relatively high, which has high toxicity. According to the "Identification Standard for Hazardous Wastes - Identification of Leaching Toxicity GB5085.3-2007", wastes with barium ion leaching toxicity greater than 100mg / kg are hazardous wastes. Long-term stacking of barium slag not only takes up a lot of land, but also pollutes the environment. Barium slag penetrates through rainwater, flows into su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12B28B11/24
CPCB28B11/245C04B28/12C04B2111/00017C04B2201/50C04B18/141C04B18/08C04B22/143C04B22/142C04B7/00C04B2103/302
Inventor 智强张志远
Owner DONGGUAN UNIV OF TECH
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