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Fly ash-based geopolymer modified coal gangue concrete block and preparation method thereof

A technology of coal gangue concrete and fly ash, which is applied in the direction of cement production, etc., can solve the problems of not very superior performance and high cost, and achieve the effects of good modification effect, repair of surface defects, and superior flexural strength

Inactive Publication Date: 2021-12-28
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the components adopted in this patent scheme are all existing and relatively expensive, and the performance is not very superior

Method used

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  • Fly ash-based geopolymer modified coal gangue concrete block and preparation method thereof
  • Fly ash-based geopolymer modified coal gangue concrete block and preparation method thereof
  • Fly ash-based geopolymer modified coal gangue concrete block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A fly ash base polymer modified coal gangue concrete block, comprising the following raw materials in parts by weight:

[0033] 80 parts of fly ash, 40 parts of slag, 180 parts of cement, 150 parts of water, 700 parts of coal gangue coarse aggregate, 300 parts of coal gangue fine aggregate, 240 parts of coal gangue sand, 40 parts of water glass, 4 parts of sodium hydroxide , 3 parts of water reducing agent.

[0034] Wherein, the method for obtaining the coal gangue coarse aggregate and coal gangue fine aggregate is as follows: the coal gangue is crushed and screened by a jaw crusher and used as block coarse and fine aggregates.

[0035] It should be noted that the coal gangue in the embodiment of the present disclosure is collected from the Zhangjiamao coal mine in northern Shaanxi.

[0036] In the scheme of the embodiment of the present disclosure, the fly ash is high-quality Class I fly ash from a power plant, and the specific surface area should be greater than 400㎡...

Embodiment 2

[0054] A fly ash base polymer modified coal gangue concrete block, comprising the following raw materials in parts by mass / weight:

[0055] 105 parts of fly ash, 45 parts of slag powder, 205 parts of cement, 175 parts of water, 785 parts of coal gangue coarse aggregate, 360 parts of coal gangue fine aggregate, 296 parts of coal gangue sand, 47 parts of water glass, 4.2 parts of sodium hydroxide parts, 3.8 parts of water reducing agent.

[0056] Wherein, the method for obtaining the coal gangue coarse aggregate and coal gangue fine aggregate is as follows: the coal gangue is crushed and screened by a jaw crusher and used as block coarse and fine aggregates.

[0057] It should be noted that the coal gangue in the embodiment of the present disclosure is collected from the Zhangjiamao coal mine in northern Shaanxi.

[0058] In the scheme of the embodiment of the present disclosure, the fly ash is high-quality Class I fly ash from a power plant, and the specific surface area shoul...

Embodiment 3

[0076] A fly ash base polymer modified coal gangue concrete block, comprising the following raw materials in parts by mass / weight:

[0077] 115 parts of fly ash, 49 parts of slag powder, 213 parts of cement, 167 parts of water, 755 parts of coal gangue coarse aggregate, 349 parts of coal gangue fine aggregate, 289 parts of coal gangue sand, 46 parts of water glass, 5.2 parts of sodium hydroxide parts, 3.4 parts of water reducing agent.

[0078] Wherein, the method for obtaining the coal gangue coarse aggregate and coal gangue fine aggregate is as follows: the coal gangue is crushed and screened by a jaw crusher and used as block coarse and fine aggregates.

[0079] It should be noted that the coal gangue in the embodiment of the present disclosure is collected from the Zhangjiamao coal mine in northern Shaanxi.

[0080] In the scheme of the embodiment of the present disclosure, the fly ash is high-quality Class I fly ash from a power plant, and the specific surface area shoul...

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Abstract

The invention relates to a fly ash based geopolymer modified coal gangue concrete block, which is prepared from 80 to 120 parts of fly ash, 40 to 65 parts of slag, 180 to 220 parts of cement, 150 to 180 parts of water, 700 to 800 parts of coal gangue coarse aggregate, 300 to 400 parts of coal gangue fine aggregate, 240 to 320 parts of coal gangue sand, 40 to 60 parts of water glass, 4 to 8 parts of sodium hydroxide and 3 to 5 parts of water reducing agent. The invention also discloses a manufacturing method of the fly ash-based geopolymer modified coal gangue concrete block; by matching the fly ash, the slag, the cement, the water, the coal gangue coarse aggregate, the coal gangue fine aggregate, the coal gangue sand, the water glass, the sodium hydroxide, the water reducing agent and the like, the existing materials such as the fly ash and the slag are fully utilized, so that the cost is reduced, and the anti-freezing performance, the compressive strength and the breaking strength are very excellent.

Description

technical field [0001] The invention relates to the field of new building material technology and solid waste recycling technology, in particular to a fly ash base polymer modified coal gangue concrete block and a preparation method thereof. Background technique [0002] Coal gangue refers to rocks with a dry basis ash content greater than 50% produced in the process of coal mine well construction, development and excavation, coal mining and coal washing. At present, the annual discharge of coal gangue is equivalent to 10-15% of the annual coal mining volume. It is estimated that by 2020, the annual output will reach 730 million tons, and the accumulated stockpiles will exceed 5 billion tons. It is the largest mineral solid waste in my country. one. In recent years, with the depletion of natural aggregate resources and under the influence of national environmental protection policies, the supply of natural aggregate has been greatly reduced and its price has continued to ris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2201/50C04B18/08C04B18/141C04B22/00C04B22/062C04B2103/302C04B14/06Y02P40/10
Inventor 秦卿
Owner XIAN UNIV OF SCI & TECH
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