Digging gangue concrete

A technology of concrete and gangue, applied in the field of concrete, to achieve the effects of low production cost, simple preparation process, and high cylinder compressive strength

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

[0008] In order to solve the problem of processing and utilization of excavation gangue that has not been solved for a long time, the purpose of the present invention is to provide an excavation gangue concrete that can be used instead of gravel

Method used

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  • Digging gangue concrete

Examples

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Effect test

example 1

[0026] Concrete with the label C10 prepared with excavation gangue coarse aggregate, the proportion of concrete material per cubic meter is: excavation gangue coarse aggregate 48%, P.0 32.5 cement 13%, medium sand 30%, water 9%; After mixing the above-mentioned mixture, put it into the mixer and stir for 3 minutes to prepare the tunnel gangue concrete.

[0027] Among them, graded excavation gangue coarse aggregate is selected, its particle size ranges from 5 to 31.5 mm, and the particle size distribution of coarse aggregate complies with the provisions of the national standard GB14685.

[0028] The water-cement ratio of the above-mentioned tunneling gangue concrete is W / C=0.69.

[0029] After on-site preparation according to the ratio of the above mixture, the average compressive strength after 28 days of curing is 13.2Mpa.

example 2

[0031] Concrete with the label C15 prepared with excavation gangue coarse aggregate, the proportion of concrete material per cubic meter is: excavation gangue coarse aggregate 48%, P.0 32.5 cement 15%, medium sand 30%, water 7%; After mixing the aforementioned mixture, put it into a mixer and stir for 4 minutes to prepare the tunneling gangue concrete.

[0032] Among them, graded excavation gangue coarse aggregate is selected, its particle size ranges from 5 to 31.5 mm, and the particle size distribution of coarse aggregate complies with the provisions of the national standard GB14685.

[0033] The water-cement ratio of the above-mentioned tunneling gangue concrete is W / C=0.47;

[0034] After on-site preparation according to the ratio of the above mixture, the average compressive strength after 28 days of curing is 16.8MPa.

example 3

[0036] Concrete with the label C20 prepared with excavation gangue coarse aggregate, the proportion of concrete material per cubic meter is: excavation gangue coarse aggregate 48%, P.0 32.5 cement 17%, medium sand 28%, water 7%; After mixing the aforementioned mixture, put it into a mixer and stir for 4 minutes to prepare the tunneling gangue concrete.

[0037] Among them, graded excavation gangue coarse aggregate is selected, its particle size ranges from 5 to 31.5 mm, and the particle size distribution of coarse aggregate complies with the provisions of the national standard GB14685.

[0038] The water-cement ratio of the above-mentioned tunneling gangue concrete is W / C=0.41.

[0039] After on-site preparation according to the ratio of the above mixture, the average compressive strength after 28 days of curing is 23.5MPa.

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Abstract

The invention discloses a tunneling waste concrete, which belongs to the technical field of concrete. Tunneling waste rock coarse aggregate with the particle size of between 5 and 31.5 millimeters after crushing and screening is adopted to replace broken stones; and after the tunneling waste rock coarse aggregate is mixed with the cement, medium sand and water in proportion, the mixture is then conveyed to a stirring machine to be stirred evenly to obtain the concrete. The obtained concrete has higher strength than that prepared from the broken stones, the preparation process is simple without adding new equipment, and the cost is low to reduce the construction cost effectively and solve the problem that the tunneling waste rock is not used reasonably for a long time, so that the tunneling waste rock is changed into valuable, accords with the national industrial policies on energy conservation, emission reduction and environmental protection, and is beneficial for popularization and application.

Description

technical field [0001] The invention relates to a concrete, in particular to a concrete prepared by using excavation gangue, and belongs to the technical field of concrete materials. Background technique [0002] With the development of modern industry, the mechanization process of coal mining has been accelerated, and the amount of mining has increased, and a large amount of excavation waste rock has accumulated and occupied land. If it is not properly treated and utilized, it will inevitably cause serious harm to the environment around the mine. [0003] Excavation gangue refers to the rocks discharged during the roadway excavation of coal mines, the rocks that have collapsed in the goaf, and the rocks that have fallen from the working face. They are mainly composed of sandstone and lime, and there are also igneous rocks in some mining areas. The main mineral components of excavation gangue are illite and carbonate minerals such as quartz, mica, and feldspar. The chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/02C04B14/06
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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