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Dry-mixed adhesive mortar prepared from coal gangue and fly ash and preparation method of dry-mixed adhesive mortar

A technology for bonding mortar and coal gangue, which is applied in the field of dry-mixed bonding mortar and its preparation, can solve the problems of limited usage of coal gangue, achieve important ecological and environmental benefits, improve tensile performance, and reduce mining steps

Pending Publication Date: 2022-03-01
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 201210341793.4 discloses a method for preparing ready-mixed mortar from coal gangue. The synthesized mortar has strong strength properties, but still uses a large amount of standard quartz sand, so that the amount of gangue used is limited

Method used

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  • Dry-mixed adhesive mortar prepared from coal gangue and fly ash and preparation method of dry-mixed adhesive mortar
  • Dry-mixed adhesive mortar prepared from coal gangue and fly ash and preparation method of dry-mixed adhesive mortar
  • Dry-mixed adhesive mortar prepared from coal gangue and fly ash and preparation method of dry-mixed adhesive mortar

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Effect test

preparation example Construction

[0029] The present invention also provides a preparation method for the above-mentioned dry-mixed adhesive mortar, comprising the following steps:

[0030] Mix gangue aggregate, stone powder, ordinary portland cement, slaked lime, fly ash, redispersible latex powder, cellulose, and starch ether to obtain a dry-mixed adhesive mortar prepared with coal gangue and fly ash.

Embodiment 1

[0033] The coal gangue is crushed with an impact crusher, screened and classified with 40 mesh, 70 mesh, and 140 mesh square hole screens, the particle size of aggregate 1 is less than or equal to 40 mesh and greater than 70 mesh, and the particle size of aggregate 2 is less than or equal to 70 mesh is greater than or equal to 140 mesh, and below 140 mesh is stone powder. Mix Aggregate 1, Aggregate 2, ordinary Portland cement, slaked lime, fly ash, stone powder, redispersible latex powder, cellulose, and starch ether according to the parts by mass in Table 1.

[0034] Table 1 embodiment 1 each material adds mass parts

[0035]

[0036] According to JGJ / T70-2009 "Standard for Test Methods of Basic Properties of Building Mortar", various performance tests were carried out, and the results are shown in Table 2.

[0037] Table 2 embodiment 1 mortar performance test result

[0038]

Embodiment 2

[0040] The coal gangue is crushed with an impact crusher, screened and classified with 40 mesh, 70 mesh, and 140 mesh square hole screens, the particle size of aggregate 1 is less than or equal to 40 mesh and greater than 70 mesh, and the particle size of aggregate 2 is less than or equal to 70 mesh is greater than or equal to 140 mesh, and below 140 mesh is stone powder. Mix Aggregate 1, Aggregate 2, ordinary Portland cement, slaked lime, fly ash, stone powder, redispersible latex powder, cellulose, and starch ether according to the parts by mass in Table 3.

[0041] Table 3 embodiment 2 each material adds mass parts

[0042]

[0043] According to JGJ / T70-2009 "Standard for Test Methods of Basic Properties of Building Mortar", various performance tests were carried out, and the results are shown in Table 4.

[0044] Table 4 embodiment 2 mortar performance test result

[0045]

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Abstract

The invention relates to the technical field of building materials, in particular to dry-mixed adhesive mortar prepared from coal gangue and fly ash and a preparation method of the dry-mixed adhesive mortar. The dry-mixed adhesive mortar prepared from coal gangue and fly ash is prepared by mixing coal gangue aggregate, stone powder, ordinary Portland cement, slaked lime, fly ash, redispersible latex powder, cellulose and starch ether. The physical characteristics of coal-based solid wastes such as coal gangue and fly ash are fully utilized, resource utilization of the coal-based solid wastes is realized, and the prepared dry-mixed adhesive mortar meets the national standard, has the characteristics of high compressive strength, high bonding strength and the like, and has important economic benefits and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a dry-mixed adhesive mortar prepared from coal gangue and fly ash and a preparation method thereof. Background technique [0002] Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. As a by-product of coal mining, coal gangue has a low calorific value, and its output accounts for about 10-15% of coal output. Coal gangue is one of the most discharged industrial solid wastes in my country, with a cumulative accumulation of more than 6 billion tons. The accumulation of coal gangue not only occupies land and pollutes the air, but also some coal gangue will spontaneously combust, which will produce a large amount of toxic and harmful gases, further causing acid rain and other hazards, and causi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/12C04B18/08
CPCC04B28/04C04B18/12C04B18/08C04B2111/00637C04B2201/50C04B14/02C04B22/064C04B2103/0057C04B24/38C04B24/383Y02W30/91
Inventor 公彦兵张永锋孟昊
Owner INNER MONGOLIA UNIV OF TECH
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