Repairing agent for subway shield segments and preparation method of repairing agent

A technology of shield segment and repairing agent, which is applied in the field of repairing materials, can solve the problems of small color difference in repairing and not given, and achieve the effect of reducing air bubbles, reducing harmful air bubbles, and ensuring later strength

Inactive Publication Date: 2020-11-27
刘翠芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technologies have no effect on how to make the repair agent through the synergistic effect of its components, high compressive strength in the early and late stages, good wear resistance, small color difference with old concrete repair, good bonding performance and crack resistance. give specific guidance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the mending agent that the subway shield segment of the present invention is used is to be made by the raw material of following mass fraction: 300 parts of ordinary Portland cement, 150 parts of white cement, sulphoaluminate cement is 100 parts, 50 parts of microbeads, 100 parts of silica fume or silica fume, 150 parts of active glass powder, 1 part of activator, 50 parts of concrete expansion agent, 0.3 parts of plastic expansion agent, 1 part of water reducer, 0.1 part of defoamer , 0.1 part of cellulose, 25 parts of redispersible latex powder, water A part, A=148.4 parts; excluding component water, the sum of the amounts of the above-mentioned components, that is, the sum of parts is B, B=927.5 parts, The ratio of water to material, that is, the ratio of A to B is 0.16:1; the above-mentioned activator is calcium oxide; the above-mentioned redispersible latex powder is vinyl acetate-ethylene copolymer powder (it can be vinyl acetate and ethylene copolyme...

Embodiment 2

[0019] Embodiment 2: the mending agent that the subway shield segment of the present invention is used is to be made by the raw material of following mass fraction: 200 parts of ordinary Portland cement, 150 parts of white cement, sulphoaluminate cement is 250 parts, 20 parts of microbeads, 50 parts of silica fume or silica fume, 250 parts of active glass powder, 3.4 parts of activator, 60 parts of concrete expansion agent, 0.3 parts of plastic expansion agent, 2 parts of water reducing agent, and 0.2 parts of defoamer , 0.1 part of cellulose, 25 parts of redispersible latex powder, part of water A, A=171.87 parts; excluding component water, the sum of the amounts of the above-mentioned components, that is, the sum of parts is B, B=1011 parts, The ratio of water to material is 0.17:1; the above-mentioned activator is sodium sulfate; the above-mentioned redispersible latex powder is acrylic acid copolymer powder; the above-mentioned ordinary portland cement is P.O42.5 cement, so...

Embodiment 3

[0021] Embodiment 3: the mending agent that the subway shield segment of the present invention is used is to be made by the raw material of following mass fraction: 300 parts of ordinary portland cements, 175 parts of white cements, sulphoaluminate cement is 175 parts, 35 parts of microbeads, 75 parts of silica fume or silica fume, 200 parts of active glass powder, 5 parts of activator, 70 parts of concrete expansion agent, 0.3 parts of plastic expansion agent, 1.5 parts of water reducing agent, and 0.1 part of defoamer , 0.1 part of cellulose, 35 parts of redispersible latex powder, part of water A, A=203.68 parts; excluding component water, the sum of the amounts of the above-mentioned components, that is, the sum of parts is B, B=1072 parts, The ratio of water to material is 0.19:1; the above-mentioned activator is sodium sulfate; the above-mentioned redispersible latex powder is acrylic acid copolymer powder; the above-mentioned ordinary Portland cement is P.O42.5 cement, s...

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PUM

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Abstract

The invention discloses a repairing agent for subway shield segments and a preparation method of the repairing agent. The repairing agent is prepared from the following raw materials in parts by mass:200 to 300 parts of ordinary Portland cement; 150-200 parts of white cement; 100 to 250 parts of sulphoaluminate cement; 20-50 parts of microbeads; 50 to 100 parts of silica fume (silica powder); 150to 250 parts of active glass powder; 1 to 10 parts of excitant; 50 to 100 parts of concrete expanding agent; 0.1 to 0.4 part of plastic expanding agent; 1 to 5 parts of water reducing agent; 0.1 to 0.4 part of defoaming agent; 0 to 0.5 part of cellulose; 15 to 35 parts of redispersible latex powder; and A parts of water. The sum of the dosages of the components excepting water, namely the sum ofthe parts of the components excepting water is B, and the water-material ratio, namely the ratio of A to B, is 0.15-0.20: 1. The invention further provides a preparation method of the repairing agent.Through the synergistic effect of all the components, the repairing agent is high in early and later compressive strength, good in wear resistance and small in color difference with old concrete repairing, has the characteristics of good bonding performance and crack resistance, and is convenient to apply and popularize.

Description

technical field [0001] The invention relates to a repairing material for a shield segment, which belongs to the technical field of repairing materials, in particular to a repairing agent for a subway shield segment. The invention also relates to a preparation method of the repairing agent for the subway shield segment. Background technique [0002] Due to the important role of shield segments in subway construction, the demand is increasing. However, the damage of shield segments is unavoidable, such as bumping during hoisting or horizontal transportation, and improper control of shield posture during shield tunneling. , Violation of the operating procedures during the assembly process will cause damage to the segments. There are various types of shield segments on the market, with uneven performance, and there is no corresponding testing standard as a guide. Therefore, the development of shield segment repair agents is also imminent. [0003] In order to restore a series ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/22C04B18/08C04B18/14C04B14/22C04B111/72
CPCC04B14/22C04B18/082C04B18/146C04B28/186C04B2111/72C04B2201/10C04B2201/50C04B7/32C04B7/02C04B22/002C04B24/383C04B22/142C04B22/064C04B24/127C04B2103/302C04B24/42C04B24/2623C04B22/147C04B26/06Y02W30/91
Inventor 王龙刘昭洋王玉乾王龙飞王进春刘翠芬
Owner 刘翠芬
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