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Concrete with heat insulation performance

A concrete and performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor thermal insulation performance of shotcrete and cannot meet the needs of deep mining, etc., to achieve large deformation performance and reduce energy consumption. The effect of reducing consumption and reducing damage

Inactive Publication Date: 2015-09-02
HUAINAN MINING IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the mining depth of the mine increases, the ground temperature gradually increases, and the thermal insulation performance of the shotcrete in the prior art is poor, which cannot meet the needs of deep mining.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment provides a concrete with thermal insulation performance, the concrete includes: fly ash, cement, water, sand, melon seeds, ceramsite, early strength agent, water reducer, polypropylene fiber;

[0017] Wherein, the proportion of the fly ash, cement, water, sand, melon seeds, ceramsite, early strength agent, water reducer, and polypropylene fiber is: the fly ash (10-30): the cement (70~90): the water (40~50): the sand (150~200): the melon seed slice (80~160): the ceramsite (40~120): the early strength agent ( 3-6): the water reducing agent (0.5-2): the polypropylene fiber (0.25-0.45).

[0018] Further, the above-mentioned fly ash is a fly ash with a surface area of ​​500 cm2 / g-700 cm2 / g.

[0019] Specifically, fly ash is a kind of artificially obtained pozzolanic mixture. Its remarkable feature is that it has no hydraulic gelling performance, but after being dissolved in water, it can be oxidized with the hydrogen in cement under normal temperature or hyd...

Embodiment 1

[0031] Embodiment 1 of the present invention has the following beneficial effects:

[0032] 1. Using fly ash, ceramsite and other wastes as raw materials can save resources, reduce energy consumption, reduce damage to the ecological environment, and greatly reduce costs;

[0033] 2. It has good heat insulation and fire resistance, which can reach 5 times the heat insulation effect of ordinary concrete, meeting the needs of deep mining in mines;

[0034] 3. It is light in weight, can reduce load, has low elastic modulus, allows large deformation performance, has good seismic performance, and meets the requirements of coal mine support structures.

Embodiment 2

[0036] A ceramsite heat-insulating concrete for mine support engineering, which includes: wherein the total amount of cement and fly ash is 350kg / m 3 , the total water consumption is 158kg / m 3 , the total amount of sand is 645kg / m 3 , the total amount of melon seeds and ceramsite is 645kg / m 3 , the total amount of polypropylene fiber is 0.9kg / m 3 , the total dosage of early strength agent is 12kg / m 3 , the total amount of water reducing agent is 3.5kg / m 3 , a dry apparent density of 1600kg / m can be obtained 3 ~1770kg / m 3 , 28-day strength of 27.9MPa ~ 44.6MPa, thermal conductivity of 0.31W / (m·k) ~ 0.35W / (m·k) insulation concrete.

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Abstract

The invention provides concrete with heat insulation performance. The concrete with the heat insulation performance comprises pulverized fuel ash, cement, water, sands, melon seed slices, ceramisites, an early strength agent, a water reducing agent and polypropylene fibers, wherein a weight ratio of the pulverized fuel ash to the cement to the water to the sands to the melon seed slices to the ceramisites to the early strength agent to the water reducing agent to the polypropylene fibers is equal to (10-30):(70-90):(40-50):(150-200):(80-160):(40-120):(3-6):(0.5-2):(0.25-0.45). The concrete with the heat insulation performance provided by the invention has good heat insulation performance and fire resistance, and ensures that the heat preservation and load-bearing requirements for deep mining of mines can be met.

Description

technical field [0001] The embodiment of the invention relates to the mine support engineering material technology, in particular to a concrete with thermal insulation performance. Background technique [0002] With the development of social economy and technology, the demand for coal is increasing, and the mining depth of mines is gradually increasing. Now many coal mining countries in the world have entered the deep mining stage. For example, the mining depth of the Carletonville gold mine in South Africa reaches 3800 m meters, the bottom of the shaft has reached 4146 meters below the surface; the mining depth of the Ibn Byron coal mine in West Germany is as high as 1530 meters; there are 30 mines over a kilometer in Canada and 11 in the United States; and 73.2% of my country's coal reserves are deeply buried Below 1000 meters, there are many mines with a mining depth of 900 meters to 1300 meters. It is expected that many coal mines will enter the mining depth of 1000 meters...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/30
CPCY02W30/91
Inventor 袁亮庞建勇薛俊华余国锋周伟邓东生刘欢王强段昌瑞任波
Owner HUAINAN MINING IND GRP
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