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Iron tailing super-fine sand concrete

A technology of iron tailings ultra-fine sand and concrete, which is applied in the field of concrete, can solve problems such as the difficulty in using construction sand directly, and achieve the effects of reducing concrete costs, reducing environmental damage, and reducing damage

Inactive Publication Date: 2015-07-01
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the tailings of iron ore are separated by cyclone, most of the fineness modulus of the tailings belong to the range of ultra-fine sand, so it is difficult to use them directly as construction sand.

Method used

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  • Iron tailing super-fine sand concrete
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  • Iron tailing super-fine sand concrete

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Effect test

Embodiment 1—4

[0016] Table 1 lists the proportion of each component of the iron tailings ultra-fine sand concrete raw material of the present invention in the single concrete.

[0017] Table 2 lists the mixing mass ratio of iron tailings sand and machine-made sand in the mixed sand of the present invention.

[0018] Table 3 lists the working performance and compressive strength of the iron ore tailings ultra-fine sand concrete of the present invention.

[0019] Table 1 The proportion of each component of the iron tailings ultra-fine sand concrete raw materials in the single concrete (kg / m 3 )

[0020]

[0021] Most domestic tailings have the characteristics of fineness, uneven particle size, and a certain amount of stone powder. The use of mixed sand can technically overcome the shortcomings of poor tailings sand gradation, especially the composite of iron ore tailings and machine-made sand. It can change the defect of fine tailings particle size and make the gradation rea...

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Abstract

The invention relates to iron tailing super-fine sand concrete and discloses concrete prepared by taking mixed sands consisting of iron tailing super-fine sand and machine-made sands as a fine aggregate, and belongs to the technical field of iron tailing sand building materials. The concrete is prepared from the following components in percentage by mass: 8-15% of cement, 21-34% of iron tailing mixed sands, 44-49% of gravels, 5-7% of an admixture, 7.2-8.3% of water and 1.6-2.2% of an efficient pumping agent for concrete based on the sum of mass of the cement and the admixture. The water-binder ratio of the prepared concrete is 0.75-0.36 and the strength grade is C20-C50. The iron tailing super-fine sand concrete provided by the invention can reduce the environmental pollution caused by iron tailings, reduce the exploitation quantity and exploitation energy consumption of natural sands and lower the production cost of the concrete, and has obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of iron tailing sand building materials, and in particular relates to concrete prepared by mixing sand composed of iron tailing ultrafine sand and machine-made sand as fine aggregate. Background technique [0002] Since the reform and opening up, my country has become the largest construction market in the world. The amount of sand used has been increasing year by year. Long-term mining has led to the gradual depletion of natural sand resources. It is urgent to find new sand resources and reduce the cost of concrete. Therefore, it is necessary to find suitable sand substitutes. Material. The particle size of iron ore in my country is fine, and the chemical composition of iron tailings is very close to that required for construction materials, which creates conditions for the development of tailings for the production of construction materials. Construction sand or aggregates are the most basic building mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/02C04B18/12
CPCY02W30/91
Inventor 何兆芳王红
Owner CHINA MCC17 GRP
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