Coal gangue concrete and preparation thereof

A technology of coal gangue concrete and concrete, which is applied in the field of concrete materials, can solve the problems of non-compliance with energy conservation and emission reduction, damage to land resources, unfavorable energy conservation and environmental protection, etc., and achieve the goals of significant waste utilization and environmental protection, land saving, and reduction of damage to cultivated land Effect

Inactive Publication Date: 2009-05-27
朝阳华龙科建股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phenomenon of destroying cultivated land is very serious and has been restricted by national policies
The above-mentioned concrete is no longer in line with my country's current energy-saving and emission-reduction policies, which destroys limited land resources and is not conducive to energy conservation and environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Coal gangue concrete LC10 prepared with artificially calcined coal gangue as coarse aggregate, the mixture ratio per cubic meter of concrete is: artificially calcined gangue 50%, 32.5 cement 15%, medium sand 27%, water 8% Finally, it was prepared by on-site stirring, and the average compressive strength was 12.5MPa after 28 days of curing.

[0034] Among them, the graded artificial calcined coal gangue coarse aggregate is selected, and its particle size ranges from 5 to 31.5 mm. The particle size distribution of the coarse aggregate complies with the provisions of the national standard GB / T17431.1-1998.

[0035] The water-cement ratio of the above artificially calcined coal gangue concrete: W / C=0.60.

[0036] The artificial calcined concrete with the above raw material ratio is prepared by on-site mixing, and the average compressive strength after 28 days of curing is 12.5MPa.

example 2

[0038] Coal gangue concrete LC20 prepared with artificially calcined coal gangue as coarse aggregate, the proportion of the mixture per cubic meter of concrete is: artificially calcined coal gangue 45%, 32.5 cement 17%, medium sand 28%, water 10%, The pH value of water = 7-8.

[0039] Among them, the graded artificial calcined coal gangue coarse aggregate is selected, and its particle size ranges from 5 to 31.5 mm. The particle size distribution of the coarse aggregate complies with the provisions of the national standard GB / T17431.1-1998.

[0040] The water-cement ratio of the above-mentioned artificially calcined coal gangue concrete: W / C=0.53; prepared by on-site mixing, the average compressive strength after 28 days of curing is 22.7MPa.

example 3

[0042] Coal gangue concrete LC30 prepared with artificially calcined coal gangue as coarse aggregate, the mixture ratio per cubic meter of concrete is: artificially calcined gangue 43%, 42.5 cement 22%, medium sand 26%, water: 9% ;The pH value of water=7;

[0043] Among them, the graded artificial calcined coal gangue coarse aggregate is selected, and its particle size ranges from 5 to 31.5 mm. The particle size distribution of the coarse aggregate complies with the provisions of the national standard GB / T17431.1-1998.

[0044] The water-cement ratio of the above-mentioned artificially calcined coal gangue concrete: W / C=0.41; after mixing and curing on site for 28 days, the average compressive strength is 33.2MPa.

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Abstract

The invention relates to a concrete product using coal gangue aggregate as a major raw material and a method for preparing the same, in particular to a method for preparing the concrete through calcining coal gangue artificially, which belongs to the technical field of concrete materials. The coal gangue used in the method is an artificially calcined gangue with the calcination temperature of between 1,100 and 1,200 DEG C; the artificial coal gangue comprises the following components by weight percentage: 40 to 50 percent of the artificially calcined gangue, 15 to 23 percent of cement, 25 to 28 percent of medium sand and 5 to 12 percent of water which are mixed and stirred evenly. The concrete product makes use of the characteristics of high pressure, light weight, low thermal conductivity, energy conservation, no radioactivity and the like of a coal gangue cylinder to change waste into valuable, and the produced concrete can be cast-in-place concrete or precast concrete, and can be used for the preparation of high-strength structural gangue concrete. The concrete product has simple process without new equipment, and can make use of the prior equipment to calcine natural gangue; besides, the concrete product has significant economic and social benefits in the aspects of land conservation, energy conservation, waste recycling, environmental protection and the like, and accords with the national industrial policy and is easy for popularization and implementation.

Description

technical field [0001] The invention relates to concrete with coal gangue as the main raw material and a preparation method thereof, belonging to the technical field of concrete materials. Background technique [0002] China is a big coal country, and its associated coal gangue has accumulated about 4.5 billion tons, occupying 1.15 million hectares of land, and produces hundreds of millions of tons of coal gangue every year. Coal gangue piles up like mountains. There are more than 1,600 coal gangues in the country It not only occupies a large amount of land, but also pollutes the air and water quality, which is extremely harmful to human beings. With the acceleration of China's urbanization process, the demand for building materials has increased significantly. In order to protect land resources, prevent random mining and digging, protect the surrounding environment of the atmosphere and water quality, deal with the accumulation of coal gangue, and turn waste into treasure, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10C04B14/06
CPCY02W30/91
Inventor 高占武高海龙钱金红曲明富吴正直张文远康志永
Owner 朝阳华龙科建股份有限公司
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