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High-strength concrete prepared from low-grade magnesite and preparation method of high-strength concrete

A technology for high-strength concrete and magnesite ore, applied in the field of concrete preparation, can solve the problems of unrecoverable magnesite ore resources, environmental pollution, destruction of cultivated land, etc., so as to avoid massive mining of stones, reduce production costs, and protect the environment. Effect

Inactive Publication Date: 2018-06-01
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

[0003] In recent years, with the acceleration of my country's socialist modernization process, large-scale mining of stones has caused a series of problems such as environmental pollution and farmland damage. At the same time, the abandoned magnesite resources due to low grade cannot be recovered well. use, resulting in a great waste of resources

Method used

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preparation example Construction

[0015] The preparation method of the high-strength concrete includes: according to the ratio of raw materials, first mix sand and cement for 5-6 minutes, then add silicon powder and stir for 5-6 minutes, then add magnesite ore and stir for 2-3 minutes, Finally, add water mixed with polycarboxylate high-efficiency superplasticizer and stir for 5-6 minutes; put the evenly stirred raw materials into the mold, vibrate to make it dense, remove the mold and maintain it under natural conditions for more than 28 days.

[0016] Magnesite is one of the advantageous mineral resources in my country, and its reserves, output, and export volume all rank first in the world. In order to change the waste of waste magnesium ore resources in our country, the present invention proposes to use discarded low-grade magnesite ore instead of stones, mix magnesite ore with sand, cement, silica powder, and water according to the mixing ratio, and add a certain amount of water reducer , mixed and stirred...

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Abstract

The invention relates to high-strength concrete prepared from low-grade magnesite. The high-strength concrete comprises the following raw materials of: in parts by weight, 1017-1123 parts of magnesitewith particle size of not less than 2 mm and not more than 25 mm, 663-731 parts of sand, 467-515 parts of cement with the label of 42.5, 143-157 parts of water, 3.8-4.2 parts of polycarboxylate superplasticizer and 36.1-39.9 parts of silicon powder, and the prepared high-strength concrete has a strength grade of C60 or above. The prepared high-strength concrete has the strength grade of C60 or above and stable performance, so that magnesium ore resources are fully utilized, excessive mining of stones is avoided, and environmental protection and reduction of production cost are facilitated.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a high-strength concrete prepared by using low-grade magnesite ore and a preparation method thereof. Background technique [0002] Concrete currently used is prepared from sand, gravel, cement and water, and its compressive strength grade is generally below C50. The preparation method is to mix stones and sand with a certain particle size 1. Mix and stir the cement. After mixing well, add water to the well-stirred mixture according to the water-cement ratio. After stirring, put it into the mold and vibrate it to make it dense, and finally maintain it under natural conditions. [0003] In recent years, with the acceleration of my country's socialist modernization process, large-scale mining of stones has caused a series of problems such as environmental pollution and farmland damage. At the same time, the abandoned magnesite resources due to low grade cannot be recove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/26
CPCC04B14/26C04B28/00C04B14/06C04B22/002C04B2103/302C04B18/146
Inventor 高华国温树青
Owner UNIV OF SCI & TECH LIAONING
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