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A kind of coal gangue chemically foamed concrete and its preparation method

A technology of chemical foaming and coal gangue is applied in the field of building materials to achieve the effects of increasing specific surface area, good economic and social benefits, and improving recycling rate

Active Publication Date: 2022-05-06
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no use of coal gangue produced in this mine in chemically foamed concrete

Method used

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  • A kind of coal gangue chemically foamed concrete and its preparation method

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preparation example Construction

[0036] The preparation method of potassium chlorate solution used in the present invention is: 2kg potassium chlorate is dissolved in the 10kg water of 50 ℃, now mixes during use.

[0037] Both the foamed cement waterproof foam stabilizer and the foamed cement early strength enhancer used in the present invention were purchased from Langfang Shuiteng Chemical Co., Ltd.

Embodiment 1

[0039] A coal gangue chemically foamed concrete, including raw materials in the following mass ratio: rapid hardening sulfoaluminate cement 52.570: mixture of coal gangue (0.16mm in particle size) and quicklime 30: foamed cement waterproof foam stabilizer 2: foam Cement early strength enhancer 0.8: β-naphthalene sulfonate sodium formaldehyde condensate 0.5: manganese dioxide 0.8: water 45: potassium chlorate solution 12.

[0040] Wherein, the mass ratio of gangue and quicklime in the mixture of gangue and quicklime is 10:2.

[0041] The preparation method of the mixture of coal gangue and quicklime is:

[0042] ① Soak the gangue with water for 24 hours (the solid-to-liquid ratio of gangue and water is 5kg: 1L);

[0043] ② Add quicklime to the coal gangue soaked for 24 hours, ball mill for 1 hour, and pass through a sandstone standard sieve to obtain a mixture of coal gangue and quicklime with a particle size of 0.16mm.

[0044] The preparation method of coal gangue chemicall...

Embodiment 2

[0051] A coal gangue chemically foamed concrete, comprising the following raw materials in mass ratio: rapid hardening sulfoaluminate cement 52.570: mixture of coal gangue (0.315 mm in particle size) and quicklime 30: foaming cement waterproof foam stabilizer 2: foaming Cement early strength enhancer 0.8: β-naphthalene sulfonate sodium formaldehyde condensate 0.45: manganese dioxide 0.8: water 35: potassium chlorate solution 12.

[0052] Wherein, the mass ratio of gangue and quicklime in the mixture of gangue and quicklime is 10:2.

[0053] The preparation method of the mixture of coal gangue and quicklime is:

[0054] ① Soak the gangue with water for 24 hours (the solid-to-liquid ratio of gangue and water is 5kg: 1L);

[0055] ② Add quicklime to the coal gangue soaked for 24 hours, ball mill for 1 hour, and pass through a sandstone standard sieve to obtain a mixture of coal gangue and quicklime with a particle size of 0.315 mm.

[0056] The preparation method of coal gangue...

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Abstract

The invention discloses a coal gangue chemically foamed concrete and a preparation method thereof. The concrete comprises the following raw materials: rapid-hardening sulphoaluminate cement or ordinary Portland cement, a mixture of coal gangue and quicklime, and foamed cement for waterproofing and foam stabilization agent, foam cement early strength enhancer, naphthalene-based water reducer, manganese dioxide, water, potassium chlorate solution. The coal gangue chemically foamed concrete prepared by the invention has the characteristics of small slurry water-cement ratio, high late strength of the foamed concrete, slow foaming speed and the like. Moreover, the requirements for the ambient temperature are not strict, and it can also be produced in an environment with a lower temperature, which prolongs the production cycle and reduces the production conditions. The gangue chemically foamed concrete prepared by the invention has the advantages of light material, high strength, good thermal insulation effect, low construction cost, high safety factor and the like. It can be used for building exterior wall insulation, roof insulation, subsidence toilet backfill, and mine goaf filling.

Description

technical field [0001] The invention relates to a coal gangue chemically foamed concrete and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Coal gangue is solid waste produced during coal mining and coal preparation, accounting for about 10-15% of the total solid waste in the country, and has become the largest industrial solid waste in my country. According to statistics, the accumulation of coal gangue in my country has exceeded 5 billion tons, and it is still increasing by 150 to 200 million tons every year. It not only takes up land, but also pollutes the air by spontaneous combustion or causes fires. Although there are many ways to utilize coal gangue at present, the comprehensive utilization rate is still not high. In addition to the influence of environmental factors and technical conditions, the key factor is that the physical and chemical properties of coal gangue in different regions of China are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B38/02C04B111/40
CPCC04B28/06C04B38/02C04B2201/20C04B2201/32C04B2201/50C04B2111/00017C04B2111/40C04B18/12C04B7/34C04B2103/48C04B2103/10C04B24/226C04B22/06C04B22/124
Inventor 龚健朱昌星李新功王兴国夏祖滨
Owner HENAN POLYTECHNIC UNIV
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