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Anti-freezing concrete preparation method by using mine tailings as aggregate

A technology for antifreeze concrete and tailings aggregates, which is applied in the field of building materials, can solve the problems of prolonged construction operation time in winter, poor antifreeze performance, large discharge of tailings waste, etc., so as to prolong construction operation time in winter and solve condensation problems Long time, the effect of resolving the increasing tension

Active Publication Date: 2015-10-28
CHINA THIRD METALLURGICAL GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the existing technology, the technical problem solved by the present invention is to provide a preparation method of antifreeze concrete with tailings as aggregate, which not only solves the problem that tailings waste discharge takes up a lot of land and pollutes the environment, but also solves the problem of building In the technical field, the problem of increasing shortage of concrete raw materials also solves the problems of long setting time and poor frost resistance of concrete in winter construction, prolonging the construction time in winter

Method used

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  • Anti-freezing concrete preparation method by using mine tailings as aggregate

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Effect test

Embodiment 1

[0022] C35 antifreeze concrete, suitable temperature: -10℃~-15℃, component formula by weight ratio: cement 24.8, tailings powder 16, tailings aggregate 35, grade III fly ash 10, water 10, tailings modified Agent 2.9 and sodium nitrite antifreeze 1.3.

[0023] Among them, the cement is slag portland cement, grade 42.5.

[0024] The tailings modifier is made of naphthalene-based powder water reducer, alum expansion agent expansion agent, cellulose ether, diatomaceous earth, zeolite powder, and latex powder in a ratio of 1.5:1.5:2:1:1:1. A composite admixture with high water-reducing, plastic-retaining and stimulating properties; the cellulose ether is methyl cellulose ether.

[0025] The tailings powder is the waste produced during the production of concentrate powder, and its particle size ≥ 280um accounts for 6%, 100um

[0026] The tailings aggregate is p...

Embodiment 2

[0032] C30 antifreeze concrete, suitable temperature: 5℃~-5℃, component formula by weight ratio: cement 24, tailings powder 17, tailings aggregate 35, grade III fly ash 10, water 10, tailings modifier 2.95, sodium nitrite antifreeze 1.05.

[0033] Among them, the cement is Portland cement, grade 42.5.

[0034] The tailings modifier is prepared from polyhydroxy acid powder water reducer, iron filings expansion agent, cellulose ether, diatomaceous earth, zeolite powder, latex powder according to the ratio of 1.5:1.5:2:1:1:1 It is a composite admixture with high water reduction, plastic retention and excitation properties; cellulose ether is methyl cellulose ether.

Embodiment 3

[0036] C25 antifreeze concrete, suitable temperature: -5℃~-10℃, component formula by weight ratio: cement 22.85, tailings powder 17, tailings aggregate 36, grade III fly ash 10, water 11, tailings modification Agent 2 and sodium nitrite antifreeze 1.15.

[0037] Among them, the cement is fly ash portland cement, grade 42.5.

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Abstract

The present invention relates to a comprehensive utilization technology in the field of building materials, and in particular relates to an anti-freezing concrete preparation method by using mine tailings as an aggregate. The concrete comprises the following components in parts by weight: 20-25 parts of cement, 15-20 parts of mine tailing powder, 30-40 parts of a mine tailing aggregate, 5-10 parts of grade III fly ash, 10-15 parts of water, 1-3 parts of a mine tailing modifier, and 1.05-1.4 parts of an anti-freezing agent. After combining and stirring, the anti-freezing concrete is obtained. Compared with the prior art, the present invention has the beneficial effects: not only the problem that mine tailing waste discharge occupies a large amount of soil and pollutes the environment is solved, but also the problem of increasing shortage of concrete raw materials in the building technical field is solved, and meanwhile the problem of long setting-time for the concrete used in winter construction and the poor anti-freezing property are solved, thereby prolonging the winter time in which construction can be performed.

Description

technical field [0001] The invention relates to a comprehensive utilization technology in the field of building materials, in particular to a method for preparing antifreeze concrete with tailings as aggregate. Background technique [0002] Tailings are wastes produced by metallurgical mining enterprises to produce fine iron ore powder. There are a lot of poor iron ore in my country, so there are a lot of tailings waste. At present, tailings wastes are generally stacked in tailings dams (reservoirs), which not only takes up a lot of land, but also seriously pollutes the environment. [0003] In the field of construction technology, the demand for concrete is increasing with the increase of national infrastructure construction, resulting in excessive exploitation of river sand and mountain rocks, which not only causes irreversible damage to the environment and resources, but also leads to the depletion of natural resources. Nervous, lacking. [0004] In northern China, win...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B28/04C04B18/12C04B22/08
CPCY02W30/91
Inventor 冯雨温研
Owner CHINA THIRD METALLURGICAL GRP
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