Application method of a support mortar coagulant prepared from coal gangue

A bearing mortar and application method technology, applied in the field of building materials, can solve the problems of poor fluidity, high cost, insufficient early strength, etc., and achieve the effects of convenient construction, low cost, and high early strength

Active Publication Date: 2022-06-07
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The preparation of support mortar in the prior art has the problems of complicated preparation, insufficient early strength, high cost and poor fluidity

Method used

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  • Application method of a support mortar coagulant prepared from coal gangue
  • Application method of a support mortar coagulant prepared from coal gangue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] Consists of the following number of parts by weight:

[0028] The industrial solid waste coal gangue is put into the crusher for crushing, and the particle size of the gangue after treatment is about 5 to 20mm, and then the crushed gangue is dry ground to obtain a particle size of 100 to 500 μm of gangue powder, and then the resulting gangue powder, water, and zirconia are compared to the mass ratio m 1:m 2 :m 3 =1:5:8, 0.03 parts of surface passivator, add wet grinding equipment for 40~60min, and obtain gangue slurry with a particle size of less than 0.3μm.

[0029] The preparation of the support mortar is as follows by weight: 39 parts of ordinary Portland cement, 6 parts of gangue coagulant, 20 parts of 30-40 mesh quartz sand, 30 parts of 40-50 mesh quartz sand, 0.2 parts of polycarboxylic acid high-efficiency superplasticizer, 4.55 parts of UEA expander, 0.15 parts of organic silicic acid defoamer, and 0.1 part of polypropylene fiber. The materials with good ratio are s...

Embodiment example 2

[0031] The industrial solid waste coal gangue is put into the crusher for crushing, and the particle size of the gangue after treatment is about 5 to 20mm, and then the crushed gangue is dry ground to obtain a particle size of 100 to 500 μm of gangue powder, and then the resulting gangue powder, water, and zirconia are compared to the mass ratio m 1 :m 2 :m 3 =1:5:8, 0.03 parts of surface passivator, add wet grinding equipment for 40~60min, and obtain gangue slurry with a particle size of less than 0.3μm.

[0032] The preparation of the support mortar by weight is as follows: 43 parts of ordinary Portland cement, 2 parts of coal gangue coagulant, 15 parts of 30-40 mesh quartz sand, 35 parts of 40-50 mesh quartz sand, 0.25 parts of polycarboxylic acid high-efficiency superplasticizer, 4.45 parts of UEA expander, 0.17 parts of organic silicic acid defoamer, 0.13 parts of polypropylene fiber. The mixed material is mixed and molded, and the strength of the test is shown in Table 1.

Embodiment example 3

[0034] The industrial solid waste coal gangue is put into the crusher for crushing, and the particle size of the gangue after treatment is about 5 to 20mm, and then the crushed gangue is dry ground to obtain a particle size of 100 to 500 μm of gangue powder, and then the resulting gangue powder, water, and zirconia are compared to the mass ratio m 1 :m 2 :m 3 =1:5:8, 0.03 parts of surface passivator, add wet grinding equipment for 40~60min, and obtain gangue slurry with a particle size of less than 0.3μm.

[0035]The preparation of the support mortar is as follows by weight: 35 parts of ordinary Portland cement, 10 parts of coal gangue coagulant, 15 parts of 30-40 mesh quartz sand, 35 parts of 40-50 mesh quartz sand, 0.15 parts of polycarboxylic acid high-efficiency superplasticizer, 4.50 parts of UEA expander, 0.25 parts of organic silicic acid defoamer, 0.1 part of polypropylene fiber. The mixed material is mixed and molded, and the strength of the test is shown in Table 1.

[0...

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Abstract

The invention discloses an application method of a support mortar coagulant prepared from coal gangue. The preparation method of the coal gangue coagulant is as follows: firstly, the coal gangue is crushed and then dry-milled to obtain coal gangue powder with a particle size of 100-500 μm. Then, according to parts by weight, add 20-30 parts of coal gangue powder, 150-160 parts of water, 240-300 parts of grinding body, and 0.01-0.05 parts of surface passivator into the wet grinding equipment for grinding for 40-60 minutes to obtain a particle size below 0.3 μm gangue slurry. The application of the coagulant in the support mortar: 25-45 parts of ordinary Portland cement, 7-20 parts of water, 2-10 parts of coal gangue coagulant, 40-60 parts of quartz sand, 0.1-20 parts of high-efficiency water reducer 0.25 parts, expansion agent 3-5.5 parts, defoamer 0.03-0.2 parts, composite fiber 0.05-0.3 parts. The early strength of the prepared support mortar can reach 22.9-24.8MPa in 2 hours, and the later strength can reach more than 70MPa without shrinkage, and the fluidity is increased by 40-60%.

Description

Technical field [0001] The present invention belongs to the field of building materials, specifically relates to a method of application of a support mortar coagulant prepared from gangue. Background [0002] At present, China's economic construction is developing at an unprecedented high speed, and infrastructure construction is developing in a magnificent trend, so it puts forward higher requirements for improving the service life of infrastructure projects, especially high-speed railways and railway passenger lines. In the bridge construction design of the railway passenger dedicated line, in order to improve its service life, the traditional box girder erection support anchoring construction process has begun to be changed, and the support anchoring is carried out by early strength mortar. A large number of studies have shown that the traditional early strength mortar materials mainly have the disadvantages of poor fluidity of the new mixed slurry, low hourly strength of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/12C04B28/04C04B103/10
CPCC04B40/0039C04B28/04C04B2201/50C04B2103/10C04B18/12C04B14/306C04B14/06C04B24/42C04B16/0633C04B2103/302C04B2103/0068Y02W30/91
Inventor 苏英吴磊贺行洋赵浩祥张权钢马庆红王传辉杨进王迎斌郑正旗
Owner HUBEI UNIV OF TECH
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