Dry mixed gunite material

A shotcrete and dry-mixing technology, applied in the field of building materials, can solve the problems of physical health damage of on-site operators, poor cohesion of cement and concrete, and large environmental pollution, so as to reduce workers' pneumoconiosis, improve anti-stripping performance, and reduce dust pollution. reduced effect

Inactive Publication Date: 2019-05-07
山西晟坤科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is the disadvantage of the tidal spraying process: the site needs to occupy a large valuable space in the roadway to store cement and sand; when cement, sand and stones are dry mixed, large dust is gen

Method used

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  • Dry mixed gunite material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] Portland cement 100 parts; quartz sand 120 parts; polymer dry milk 4 parts; polypropylene fiber 0.6 parts; early strength agent 0.3 parts; hydroxypropyl methylcellulose 0.2 parts; heavy calcium carbonate 25 parts; naphthalene series 0.5 parts of water reducer; 0.3 parts of cellulose ether; add to twin-screw high-efficiency mixer, fully stir for 20 minutes, mix well, put into mortar mixer, and then add to water with 20 parts of air-entraining agent , mixed and stirred into wet mortar, and then sprayed with a wet shotcrete machine, and the construction thickness is 12mm.

Example Embodiment

[0025] Example 2

[0026] Portland cement 100 parts; quartz sand 250 parts; polymer dry emulsion 5 parts; polypropylene fiber 0.7 parts; early strength agent 0.4 parts; hydroxypropyl methylcellulose 0.2 parts; heavy calcium carbonate 10 parts; naphthalene 0.6 parts of water reducer; 0.2 parts of cellulose ether; add to twin-screw high-efficiency mixer, fully stir for 25 minutes, mix well, put into mortar mixer, and then add to water with 30 parts of air-entraining agent , mixed and stirred into wet mortar, and then sprayed with a wet shotcrete machine, and the construction thickness is 15mm.

Example Embodiment

[0027] Example 3

[0028] Portland cement 100 parts; quartz sand 200 parts; polymer dry emulsion 3 parts; polypropylene fiber 0.5 parts; early strength agent 0.2 parts; hydroxypropyl methylcellulose 0.3 parts; heavy calcium carbonate 30 parts; naphthalene series 0.4 parts of water reducer; 0.4 parts of cellulose ether; add to the twin-screw high-efficiency mixer, fully stir for 30 minutes, mix well, put it into the mortar mixer, and then add it to the water with 10 parts of air-entraining agent , mixed and stirred into wet mortar, and then sprayed with a wet shotcrete machine, and the construction thickness is 12mm.

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PUM

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Abstract

The invention discloses a dry mixed gunite material. The dry mixed gunite material comprises the following components, in parts by weight: 100 parts of Portland cement, 120-250 parts of quartz sand, 3-5 parts of polymer dry emulsion, 0.5-0.7 part of polypropylene fibers, 0.2-0.4 part of an early strength agent, 0.2-0.3 part of hydroxypropyl methyl cellulose, 10-30 parts of an air-entraining agent,0-50 parts of heavy calcium carbonate, 0.4-0.6 part of a naphthalene-type water reducing agent and 0.2-0.4 part of cellulose ether. The dry mixed gunite material provided by the invention reduces anoccurrence of worker pneumoconiosis caused by dust pollution; and the performance of the gunite material is greatly improved, the cohesiveness is reinforced, and therefore the anti-stripping performance of the gunite material is significantly improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a dry-mixed spraying material. Background technique [0002] Concrete spraying material has the characteristics of high degree of mechanization, fast construction period, and labor saving, and has been widely used in the construction of houses and tunnels. Equipment In the field of coal mining, concrete shotcrete material is more important. [0003] Coal mine underground roadway is an indispensable channel for mining and transporting coal. In order to ensure the smoothness of the underground roadway, prevent further cracking of rocks, falling of broken stones, anti-seepage and water leakage of the roadway, and beautify the roadway, it is necessary to support the roadway with concrete shotcrete. The traditional spraying support process is the tidal spraying process; that is, a certain proportion of cement, sand, etc. is evenly stirred on site, and transported to the w...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/10
Inventor 康勇兵
Owner 山西晟坤科技发展有限公司
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