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Ground coal gangue powder concrete as well as preparation and application methods thereof

A technology of coal gangue powder and concrete, which is applied in the field of concrete, can solve the problems of polluting the environment, producing harmful and toxic gases, etc., and achieves the effects of improving fluidity and enhancing resistance to chloride ion permeability.

Inactive Publication Date: 2014-12-03
廖昌兴 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nearly 1 / 3 of coal gangue spontaneously ignites due to the presence of pyrite and carbonaceous substances, producing harmful and toxic gases and seriously polluting the environment

Method used

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  • Ground coal gangue powder concrete as well as preparation and application methods thereof
  • Ground coal gangue powder concrete as well as preparation and application methods thereof

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] In the present invention, the components involved are all in mass percent.

[0027] The present invention is achieved in that a kind of pulverized coal gangue powder concrete comprises:

[0028] Study the chemical composition, particle size distribution and microscopic morphology of a finely ground coal gangue powder, and test its performance with reference to "Fly Ash Used in Cement and Concrete" GB / T 1596-2005;

[0029] Taking C20-C60 concrete as the research object, 20%-30% ground burnt coal gangue powder is mixed into the concrete to study the workability, strength and durability of the ground burnt coal gangue ...

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Abstract

The invention discloses ground coal gangue powder concrete as well as preparation and application methods thereof. The concrete comprises the following components in parts by mass: 150-450 parts of cement, 30-130 parts of ground coal gangue powder, 630-800 parts of sand, 1000-1270 parts of stones, 150-210 parts of water and 3-12 parts of water reducing agent. The preparation method of the ground coal gangue powder concrete comprises the steps of uniformly mixing and stirring the components in parts by mass. The chemical component, the size distribution and the micromorphology of the ground coal gangue powder are studied and the performances of the ground coal gangue powder are detected through referencing fly ash used in cement and concrete GB / T 1596-2005; and 20-30% of ground coal gangue powder is doped into the concrete by taking C20-C60 concrete as study objects so as to study the workability, the strength and the durability (containing the permeability resistance, the freezing resistance, carbonization, the sulfate corrosion resistance, the chloride ion penetration resistance and the shrinkage ratio) of the ground coal gangue powder concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a ground burnt coal gangue powder concrete and a preparation method thereof. Background technique [0002] Concrete (mortar) admixture refers to artificial or natural mineral materials and industrial waste that are directly added together with other components of concrete (mortar) before or during the mixing process of concrete. The amount is generally greater than 5% of the weight of cement. %. Its purpose is to improve the performance of concrete, adjust the strength level of concrete and save the amount of cement. Commonly used admixtures in civil engineering include fly ash, silica fume, ground slag powder, ground spontaneous combustion coal gangue and other industrial waste. Fly ash is currently the largest and most widely used admixture. [0003] Burned coal gangue powder has a certain pozzolanic activity, it can be used as a concrete admixture, and when the...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/12C04B14/06
CPCY02W30/91
Inventor 柯国军廖昌兴
Owner 廖昌兴
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