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A shotcrete and durability technology, applied in the field of concrete, can solve the problems of dust pollution, inappropriate ratio of raw materials and high rebound rate
Inactive Publication Date: 2010-01-27
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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Problems solved by technology
[0012] In order to solve the problems of dust pollution and high rebound rate caused by inappropriate raw material ratio existin
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Embodiment 1
[0019] Embodiment 1, the high-durability lightweight shotcrete used for planting mines is composed of the following raw materials in weight ratio: 337.5kg of cement, 737kg of slag, 574kg of sand, 45kg of fly ash, 45kg of slag micropowder, 22.5kg of silica fume, quick-setting Agent 13.5kg, water 180kg.
[0020] After the above raw materials are mixed, they can be directly sprayed on the working surface through the spraying machine. The polyphenylene particles are preferably regenerated polystyrene particles, which are crushed from waste polystyrene boards in a foam crushing granulator, and the characteristics are that the regenerated polyphenylene particles are broken and have a rough surface.
[0021] The particle size of aggregate slag used in the lightweight shotcrete is 2.35-10 mm, and water retention treatment is required before use. The regenerated polyphenylene particles used in the lightweight shotcrete have a particle size of 3-5 mm and a bulk density of 11 kg / m 3 , ...
Embodiment 2
[0027] Embodiment 2, a kind of high-durability lightweight shotcrete for mining is composed of the following raw materials in weight ratio: 320 parts of cement, 750 parts of slag, 590 parts of sand, 50 parts of fly ash, 40 parts of slag micropowder, silica fume 25 parts, 10 parts of accelerator, 200 parts of water. Implementation method is the same as embodiment 1
Embodiment 3
[0028] Embodiment 3, a kind of high-durability lightweight shotcrete for mining is composed of the following raw materials in weight ratio: 350 parts of cement, 710 parts of slag, 590 parts of sand, 40 parts of fly ash, 50 parts of slag micropowder, silica fume 20 parts, 15 parts of accelerator, 160 parts of water. Implementation method is the same as embodiment 1
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Abstract
The invention relates to a concrete, in particular to a mining high durability light sprayed concrete, aiming at solving the problems of dust pollution caused by improper mixture ratio of raw materials, high resilience rate and the like in the prior art of the sprayed concrete. The sprayed concrete comprises the raw materials based on the parts by weight: 320-350 parts of cement, 710-750 parts of furnace slag, 550-590 parts of sand, 40-50 parts of pulverized fuel ash, 40-50 parts of mineral waste residue micro powder, 20-25 parts of siliceous dust, 10-15 parts of accelerating agent and 160-200 parts of water. Compared with the common sprayed concrete, the sprayed concrete using light aggregate has the self weight to be reduced by 25-35%, has the mechanical property meeting the tunnel supporting protection need under a certain density grade, and is beneficial to the protection of a whole supporting protection system.
Description
technical field [0001] The invention relates to concrete, in particular to a high-durability lightweight shotcrete for mining. Background technique [0002] Shotcrete construction technology is often used in the mining process. Whether the technology is reasonable or not determines the quality of construction. Many details involved in construction are related to ensuring the strength of shotcrete. Optimal construction technology and reasonable selection of concrete are The key to quality control. Shotcrete construction process mainly includes: dry spraying method, tidal spraying method, wet spraying method, mixed spraying method, etc. [0003] The main difference between them is that the feeding procedures of each process flow are different, especially the timing of adding water and accelerator is different. The dry spraying method is the earliest spraying construction method, and it is widely used. The dry spraying method is to use a forced mixer to dry mix a certain pro...
Claims
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Application Information
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