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Concrete aggregate prepared by utilizing coal gangue and preparation method thereof

A technology of concrete aggregate and coal gangue, which is applied in the field of building materials, can solve the problems of low aging resistance and weather resistance, aggregates are not easy to scatter, and low service life, and achieve high aging resistance and weather resistance, not easy to scatter, and save construction costs. Effect

Active Publication Date: 2017-01-11
重庆交院和瑞工程检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low strength, low density, high water absorption, easy pulverization, low aging and weather resistance, and low service life of concrete aggregates prepared from solidified waste, as well as the problems that aggregates are easily scattered during use, the invention The purpose is to provide a concrete aggregate prepared from coal gangue and a preparation method thereof. The concrete aggregate of the present invention has high strength, high density, low water absorption, is not easily pulverized, has higher aging resistance and weather resistance, and the bone is The material is not easy to scatter, and has a wide range of applications, suitable for promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A concrete aggregate prepared from coal gangue, the concrete aggregate is made of the following raw materials in parts by weight: 110 parts of coal gangue fragments, 50 parts of foundry waste sand, 10 parts of copper mud, 10 parts of red mud, 50 parts of regenerated diatomite fragments, 5 parts of additives, 6 parts of calcium hydroxide and 5 parts of sodium hydroxide solution with a mass concentration of 0.5mol / L, wherein the regenerated diatomite fragments are in parts by weight It is made of 40 parts of slurry waste diatomite, 20 parts of modified steel slag fine powder, 6 parts of surface modifier and 0.04 part of foaming agent. Made of sodium borate.

[0024] The surface modifying agent is composed of sodium hydroxide solid, calcium sulfate dihydrate, potassium methyl silicate, lignin coupling agent and titanate coupling agent in a weight ratio of 3:3:2.5:2.5:3.5.

[0025] The additive is composed of barium stearate, flame retardant fiber and polyimide fiber with ...

Embodiment 2

[0034]A concrete aggregate prepared from coal gangue, the concrete aggregate is made of the following raw materials in parts by weight: 130 parts of coal gangue fragments, 60 parts of foundry waste sand, 15 parts of copper mud, 15 parts of red mud, 60 parts of regenerated diatomite fragments, 7 parts of additives, 8 parts of calcium hydroxide and 7 parts of sodium hydroxide solution with a mass concentration of 0.5mol / L, wherein the regenerated diatomite fragments are in parts by weight It is made of 50 parts of slurry waste diatomite, 25 parts of modified steel slag fine powder, 9 parts of surface modifier and 0.05 part of foaming agent. Made of sodium borate.

[0035] The surface modifying agent is composed of solid sodium hydroxide, calcium sulfate dihydrate, potassium methyl silicate, lignin coupling agent and titanate coupling agent in a weight ratio of 3.5:3.5:2:2:3.5.

[0036] The additive is composed of barium stearate, flame retardant fiber and polyimide fiber with a...

Embodiment 3

[0045] A concrete aggregate prepared from coal gangue, the concrete aggregate is made of the following raw materials in parts by weight: 150 parts of coal gangue fragments, 70 parts of foundry waste sand, 20 parts of copper mud, 20 parts of red mud, 70 parts of regenerated diatomite fragments, 9 parts of additives, 10 parts of calcium hydroxide and 9 parts of sodium hydroxide solution with a mass concentration of 0.5mol / L, wherein the regenerated diatomite fragments are in parts by weight It is made of 60 parts of slurry waste diatomite, 30 parts of modified steel slag powder, 11 parts of surface modifier and 0.06 part of foaming agent. The modified steel slag powder is made of steel slag and partial Made of sodium borate.

[0046] The surface modifier is composed of solid sodium hydroxide, calcium sulfate dihydrate, potassium methyl silicate, lignin coupling agent and titanate coupling agent in a weight ratio of 3.5:3:2.5:2.5:3.5.

[0047] The additive is composed of barium ...

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Abstract

The invention relates to concrete aggregate prepared by utilizing coal gangue and a preparation method thereof. The concrete aggregate is prepared from the following raw materials in parts by weight: 110-150 parts of broken coal gangue, 50-70 parts of foundry waste sand, 10-20 parts of copper sludge, 10-20 parts of red mud, 50-70 parts of regenerated diatomite broken pieces, 5-9 parts of additives, 6-10 parts of calcium hydroxide and 5-9 parts of sodium hydroxide solution with the mass concentration of 0.5mol / L, wherein the regenerated diatomite broken pieces are prepared from the following components in parts by weight: 40-60 parts of waste diatomite slurry, 20-30 parts of modified steel slag micro-powder, 6-11 parts of a surface modifier and 0.04-0.06 part of a foaming agent; and the modified steel slag micro-powder is prepared from steel slag and sodium metaborate which accounts for 1 / 10 to 1 / 2 of the weight of the steel slag. According to the invention, a large-scale application direction is found for the coal gangue, foundry waste sand, copper sludge, red mud, steel slag and waste diatomite, the waste materials are changed into things of value, and the environmental pollution and land occupation caused by solid wastes are reduced, so that the resources are further utilized, and energy conservation and environment friendliness are achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete aggregate prepared from coal gangue and a preparation method thereof. Background technique [0002] Solidified waste, such as coal gangue, foundry waste sand, copper mud, red mud, steel slag, waste diatomite, etc., the government invests a lot of money every year to bury and incinerate them, which seriously wastes precious land resources. The sulfide produced by incineration will destroy ozone when it enters the atmosphere, and the smoke produced will cause environmental pollution such as smog. Therefore, the utilization of solidified waste has very important practical significance and value. [0003] At present, many solidified wastes are used to prepare concrete aggregates, so as to turn waste into treasure, reduce environmental pollution, greatly reduce construction costs, and have huge economic benefits. However, due to improper material selection, unre...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B20/02C04B18/12C04B18/04C04B18/14C04B20/10
CPCC04B18/0409C04B18/0481C04B18/12C04B18/142C04B18/144C04B20/02C04B20/023C04B20/1055C04B40/0039C04B14/08C04B24/085C04B20/0048C04B16/0691C04B22/064C04B22/062C04B22/0013C04B22/143C04B24/42C04B24/24C04B24/40C04B2103/0068Y02W30/91
Inventor 张德波
Owner 重庆交院和瑞工程检测技术有限公司
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