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A kind of C30 tailings sand anti-dispersion concrete and its preparation method

A technology of tailings sand and concrete is applied in the field of building materials, which can solve the problems of low concrete strength and inability to meet the requirements of underwater construction, and achieve the effects of reducing concrete cost, low production cost and saving resources.

Active Publication Date: 2018-09-11
WUHAN YUANJING READY MIXED CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the ordinary concrete material system cannot meet the requirements of underwater construction
At this stage, the underwater concrete prepared by the anti-dispersant agent mentioned in the relevant patents has low concrete strength, and the ratio of water and land strength is generally only 65%-70% (7d) and 70%-75% (28d).

Method used

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  • A kind of C30 tailings sand anti-dispersion concrete and its preparation method

Examples

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Effect test

Embodiment 1

[0034] This embodiment provides a C30 tailings sand anti-dispersion concrete. The amount of materials in each cubic concrete is as follows: 300 kg of cement, 100 kg of activated tailings sand, 350 kg of coarse tailings sand, 400 kg of machine-made sand, 1100 kg of stone, 150 kg of water, and 60 kg of admixture.

[0035] The preparation method of the above-mentioned C30 tailings sand anti-dispersion concrete comprises the following steps:

[0036] 1) Screening: take the tailings sand according to the amount of the material, and obtain two kinds of tailings sands with a size of less than 80 μm or more than 80 μm through screening, and the tailings sand with a size of more than 80 μm is coarse tailings sand;

[0037] 2) Calcination: calcining tailings sand below 80 μm at 600-800°C for 3 hours, and cooling to room temperature for 0.5-2 hours;

[0038] 3) Weighing: Take cement, machine-made sand, stone, water, admixture, active tailings, and coarse tailings according to the amount ...

Embodiment 2

[0049] This embodiment provides a kind of C30 tailings sand anti-dispersion concrete. The amount of each material in each cubic concrete is as follows: the amount of each material in each cubic concrete is 240 kg of cement, 160 kg of activated tailings sand, 300 kg of coarse tailings sand, 450 kg of machine-made sand, and 1056 kg of melon seeds. , water 160kg, admixture 60kg.

[0050] The preparation method of the above-mentioned C30 tailings sand anti-dispersion concrete is the same as that of Example 1.

[0051] The composition and preparation method of the above-mentioned admixture are the same as in Example 1.

Embodiment 3

[0053] This embodiment provides a C30 tailings sand anti-dispersion concrete. The amount of materials in each cubic concrete is as follows: 280 kg of cement, 120 kg of activated tailings sand, 450 kg of coarse tailings sand, 300 kg of machine-made sand, 950 kg of melon seeds, 130 kg of water, and 60 kg of admixture.

[0054] The preparation method of the above-mentioned C30 tailings sand anti-dispersion concrete is the same as that of Example 1.

[0055] The composition and preparation method of the above-mentioned admixture are the same as in Example 1.

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Abstract

The invention discloses C30 tailing sand anti-washout concrete and a preparing method thereof. The concrete is composed of a cementing material, aggregate, an additive and water, the cementing material is composed of cement and activated fine tailing sand, the aggregate is composed of coarse aggregate and fine aggregate, the fine aggregate is composed of coarse tailing sand and manufactured sand, and the coarse aggregate is made of stone. One cubic meter of concrete is prepared from 180-300 kg of cement, 80-160 kg of activated tailing sand, 150-450 kg of coarse tailing sand, 300-600 kg of manufactured sand, 950-1100 kg of stone, 120-170 kg of water and 20-80 kg of additive. The environment-friendly concrete has good promoting effects of protecting the ecological environment and promoting circular economy development, cost of the concrete is reduced, and the concrete has good washout resistance and workability.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a C30 tailing sand anti-dispersion concrete and a preparation method thereof. Background technique [0002] Tailings are the waste after mineral processing and are the main component of industrial solid waste. According to incomplete statistics, more than 10 billion tons of tailings and waste rocks are discharged in the world every year. At present, there are more than 8,000 state-owned mines and more than 110,000 township collective mines in China. The tailings stockpiled is nearly 5 billion tons, and the annual tailings discharge is as high as 500 million tons. Among them, the annual tailings discharge of ferrous metallurgical mines reaches 1.5 billion tons. At present, the comprehensive utilization rate of tailings in our country is only 7%. Therefore, the comprehensive recycling of tailings has been widely concerned by the whole society. [0003] Concrete is one of the mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B20/04C04B20/02C04B18/12
CPCC04B20/04C04B28/00C04B2201/50C04B18/12C04B14/02C04B24/085C04B24/383C04B24/2652C04B2103/302C04B20/026Y02W30/91
Inventor 周晓阳张凡
Owner WUHAN YUANJING READY MIXED CONCRETE CO LTD
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