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Application method of bearing mortar coagulant prepared from coal gangue

A technology of bearing mortar and application method, applied in the field of building materials, can solve the problems of complex preparation, high cost, poor fluidity and the like

Active Publication Date: 2021-03-23
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 bearing mortar coagulant prepared from coal gangue
  • Application method of bearing mortar coagulant prepared from coal gangue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] Consists of the following raw materials in parts by weight:

[0028] The industrial solid waste coal gangue is put into the crusher for crushing. The particle size of the processed coal gangue is about 5-20 mm, and then the crushed coal gangue is dry-milled to obtain coal gangue powder with a particle size of 100-500 μm. Then the obtained coal gangue powder, water, and zirconia are mixed according to the mass ratio m 1 :m 2 :m 3 =1:5:8, 0.03 parts of surface passivation agent, added to wet grinding equipment for wet grinding for 40-60 minutes, to obtain coal gangue slurry with a particle size of 0.3 μm or less.

[0029] The preparation of the support mortar is as follows in parts by weight: 39 parts of ordinary Portland cement, 6 parts of coal gangue coagulant, 20 parts of 30-40 mesh quartz sand, 30 parts of 40-50 mesh quartz sand, polycarboxylic acid high-efficiency reducing agent 0.2 parts of water agent, 4.55 parts of UEA expansion agent, 0.15 parts of organosilic...

Embodiment example 2

[0031] The industrial solid waste coal gangue is put into the crusher for crushing. The particle size of the processed coal gangue is about 5-20 mm, and then the crushed coal gangue is dry-milled to obtain coal gangue powder with a particle size of 100-500 μm. Then the obtained coal gangue powder, water, and zirconia are mixed according to the mass ratio m 1 :m 2 :m 3 =1:5:8, 0.03 parts of surface passivation agent, added to wet grinding equipment for wet grinding for 40-60 minutes, to obtain coal gangue slurry with a particle size of 0.3 μm or less.

[0032] The preparation of the support mortar is as follows in parts by weight: 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, polycarboxylic acid high-efficiency 0.25 parts of water agent, 4.45 parts of UEA expansion agent, 0.17 parts of organosilicic acid defoamer, and 0.13 parts of polypropylene fiber. The proportioned materials...

Embodiment example 3

[0034] The industrial solid waste coal gangue is put into the crusher for crushing. The particle size of the processed coal gangue is about 5-20 mm, and then the crushed coal gangue is dry-milled to obtain coal gangue powder with a particle size of 100-500 μm. Then the obtained coal gangue powder, water, and zirconia are mixed according to the mass ratio m 1 :m 2:m 3 =1:5:8, 0.03 parts of surface passivation agent, added to wet grinding equipment for wet grinding for 40-60 minutes, to obtain coal gangue slurry with a particle size of 0.3 μm or less.

[0035] The preparation of the support mortar is as follows in parts 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, polycarboxylic acid high-efficiency 0.15 parts of water agent, 4.50 parts of UEA expansion agent, 0.25 parts of organosilicic acid defoamer, and 0.1 part of polypropylene fiber. The proportioned materials w...

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Abstract

The invention discloses an application method of a bearing mortar coagulant prepared from coal gangue. A preparation method for the bearing mortar coagulant comprises the following steps: crushing coal gangue, carrying out dry grinding to obtain coal gangue powder with a particle size of 100-500 [mu]m, adding 20-30 parts by weight of the coal gangue powder, 150-160 parts by weight of water, 240-300 parts by weight of a grinding body and 0.01-0.05 part by weight of a surface passivator into wet grinding equipment, and conducting grinding for 40-60 minutes so as to obtain coal gangue slurry witha particle size of less than 0.3 [mu]m. The coagulant is applied to bearing mortar. The bearing mortar comprises 25-45 parts of ordinary Portland cement, 7-20 parts of water, 2-10 parts of the coal gangue coagulant, 40-60 parts of quartz sand, 0.1-0.25 part of a superplasticizer, 3-5.5 parts of an expanding agent, 0.03-0.2 part of a defoaming agent and 0.05-0.3 part of composite fibers. The earlystrength of the prepared bearing mortar can reach 22.9-24.8 MPa in 2 h, the later strength of the prepared bearing mortar can reach 70 MPa or above, the mortar does not shrink, and the fluidity of the mortar is improved by 40-60%.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to an application method of a coagulation accelerator for support mortar prepared from coal gangue. Background technique [0002] At present, China's economic construction is developing rapidly at an unprecedented high speed, and infrastructure construction is developing in a magnificent manner. Therefore, higher requirements are put forward for improving the service life of infrastructure projects, especially high-speed railways and railway passenger dedicated lines. In the bridge construction design of railway passenger dedicated line, in order to improve its service life, the traditional box girder erection support and anchoring construction technology has been changed, and early strength mortar is used for support anchorage. A large number of studies have shown that traditional early-strength mortar materials mainly have disadvantages such as poor fluidity of freshl...

Claims

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Application Information

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Patent Type & Authority Applications(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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