Treatment method of machine-made sand tailings and concrete prepared from machine-made sand tailings

A processing method and technology of machine-made sand, applied in the field of building materials, can solve problems such as poor construction performance of concrete, and achieve the effects of reducing concrete cost, realizing waste and solid reuse, and reducing dependence on mineral admixtures.

Active Publication Date: 2020-02-28
GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The use of machine-made sand tailings as concrete raw materials is rarely mentioned in the prior art, and the problem of poor construction performance of concrete prepared from machine-made sand tailings has not been well resolved

Method used

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  • Treatment method of machine-made sand tailings and concrete prepared from machine-made sand tailings
  • Treatment method of machine-made sand tailings and concrete prepared from machine-made sand tailings
  • Treatment method of machine-made sand tailings and concrete prepared from machine-made sand tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides a kind of processing method of machine-made sand tailings, and this processing method comprises the following steps:

[0031] (1) Collect the machine-made sand tailings, and dry the collected machine-made sand tailings with hot air, so that the water content of the machine-made sand tailings is lower than 1%; the machine-made sand tailings are solids formed during the production of machine-made sand Waste, the calcium carbonate content of the machine-made sand tailings is greater than 75%, and the methylene blue value is not greater than 1%;

[0032] (2) Put the dried machine-made sand tailings into the crusher for crushing, and then grind them until the specific surface area is 600m 2 / kg.

[0033] This embodiment also provides a kind of concrete. The machine-made sand tailings obtained by the above-mentioned treatment method are used as raw materials. The concrete is specifically composed of the following raw materials in parts by weig...

Embodiment 2

[0038] The present embodiment provides a kind of processing method of machine-made sand tailings, and this processing method comprises the following steps:

[0039] (1) Collect the machine-made sand tailings, and dry the collected machine-made sand tailings with hot air, so that the water content of the machine-made sand tailings is lower than 1%; the machine-made sand tailings are solids formed during the production of machine-made sand Waste, the calcium carbonate content of the machine-made sand tailings is greater than 75%, and the methylene blue value is not greater than 1%;

[0040] (2) Put the dried machine-made sand tailings into a crusher for crushing, and then grind until the particle size is 500 mesh and the fineness is not more than 10%.

[0041]This embodiment also provides a kind of concrete. The machine-made sand tailings obtained by the above-mentioned treatment method are used as raw materials. The concrete is specifically composed of the following raw materia...

Embodiment 3

[0046] The present embodiment provides a kind of processing method of machine-made sand tailings, and this processing method comprises the following steps:

[0047] (1) Collect the machine-made sand tailings, and dry the collected machine-made sand tailings with selected powder, so that the water content of the machine-made sand tailings is lower than 1%; the machine-made sand tailings are formed during the production of machine-made sand Solid waste, the calcium carbonate content of the machine-made sand tailings is greater than 75%, and the methylene blue value is not greater than 1%;

[0048] (2) Put the dried machine-made sand tailings into a crusher for crushing, and then grind until the particle size is 400 mesh, and the fineness is not more than 10%.

[0049] This embodiment also provides a kind of concrete. The machine-made sand tailings obtained by the above-mentioned treatment method are used as raw materials. The concrete is specifically composed of the following ra...

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Abstract

The invention relates to the field of building materials, in particular to a treatment method of machine-made sand tailings and concrete prepared from the machine-made sand tailings. The concrete disclosed by the invention is prepared from the following raw materials in parts by weight: 250-400 parts of cement, 15-90 parts of the machine-made sand tailings, 0-90 parts of fly ash, 700-1000 parts ofmachine-made sand, 900-1200 parts of gravel, 140-220 parts of water and 4-10 parts of a water reducing agent. The machine-made sand production waste is selected as a novel mineral admixture to be applied to the concrete, the construction cost can be reduced, meanwhile, various index requirements of the concrete can be met, and the concrete has excellent working performance and uniform appearancequality and is obviously superior to traditional concrete. The application of the machine-made sand tailings in the concrete realizes the purposes of reusing waste solids, turning waste into wealth and being green, energy-saving and environment-friendly.

Description

【Technical field】 [0001] The invention relates to the field of building materials, in particular to a processing method for machine-made sand tailings and concrete prepared by using the machine-made sand tailings. 【Background technique】 [0002] Natural sand is a non-renewable local resource. With the increasing scale of national infrastructure and the gradual strengthening of environmental protection measures for farmland and rivers, the use of natural sand resources is limited. Decades of over-exploitation of natural sand has caused devastating damage to river channels, seriously affecting riverbed stability and flood control safety. At present, natural sand resources have been greatly reduced and are close to exhaustion. The contradiction between supply and demand of concrete sand is particularly prominent. According to incomplete statistics, the use of machine-made sand in concrete is gradually increasing. Since 2008, the amount of sand and gravel in my country has incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/04C04B20/02C04B28/04
CPCC04B18/0481C04B28/04C04B20/026C04B2201/50C04B2111/00017C04B18/08C04B14/06C04B14/02C04B22/002C04B2103/302Y02W30/91
Inventor 王建军何建乔韩玉池浩翁怡令凌忠冯春萌袁征李威李彩霞黄建斌黄俊富解威威邵羽黄朝军刘涌周邦鸿翟少磊陆艺
Owner GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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