Concrete member mending agent, preparation method and construction method

A construction method and repairing agent technology, applied in earthwork drilling, building maintenance, shaft equipment, etc., can solve the problems of large hydration shrinkage, inconsistent color, and easy cracking of cement slurry, so as to improve construction performance and reduce construction cost. Good strength and good appearance

Active Publication Date: 2012-12-26
CHINA RAILWAY 19 BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of direct cement slurry repair has the following disadvantages: after the cement slurry is hardened, the bonding force with the structural base is not enough, and it is easy to fall off after a period of use; the hydration shrinkage of the cement slurry is large, and it is easy to crack after hardening; The color is inconsistent with the color of the base concrete, and there is a color difference

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The formulation of the repair agent is as follows:

[0068] P.O42.5 Portland cement: 240kg;

[0069] 42.5 grade sulphoaluminate cement: 60kg;

[0070] Class II fly ash: 150kg;

[0071] S95 grade mineral powder: 100kg;

[0072] 70-120 mesh quartz sand: 280kg;

[0073] Rubber powder 8031H: 50kg;

[0074] Rubber powder 5011L: 20kg;

[0075] Cellulose ether 10007P4: 0.5kg;

[0076] Thixotropic lubricant 602: 5 kg.

[0077] The preparation process is as follows: Accurately weigh each raw material component of the above weight, mix and stir evenly to obtain.

[0078] The construction process is as follows:

[0079] (1) The concrete components such as bridge piers, beams, tunnels, and track slabs to be treated should first be brushed with a wire brush to clean the surface laitance;

[0080] (2) Sprinkle water on the surface of the concrete component to be treated until the concrete surface is saturated with water;

[0081] (3) Mix the repair agent and water in the rati...

Embodiment 2

[0094] The cement paint formula is as follows:

[0095] P.O42.5 Portland cement: 232kg;

[0096] 42.5 grade sulphoaluminate cement: 58kg;

[0097] Class II fly ash: 100kg;

[0098] S95 grade mineral powder: 160kg;

[0099] 70-120 mesh quartz sand: 300kg;

[0100] Rubber powder 8031H: 45kg;

[0101] Rubber powder 5011L: 20kg;

[0102] Cellulose ether 10007P4: 1kg;

[0103] Thixotropic lubricant 602: 7 kg.

[0104] The preparation process is as follows: Accurately weigh each raw material component of the above weight, mix and stir evenly to obtain.

[0105] The construction process is as follows:

[0106] (1) The concrete components such as bridge piers, beams, tunnels, and track slabs to be treated should first be brushed with a wire brush to clean the surface laitance;

[0107] (2) Sprinkle water on the surface of the concrete component to be treated until the surface is saturated with water;

[0108] (3) Evenly wipe the dry powder of the repair agent on the surface ...

Embodiment 3

[0117] The formulation of the repair agent is as follows:

[0118] P.O42.5 Portland cement: 260kg;

[0119] 42.5 grade sulphoaluminate cement: 75kg;

[0120] Class II fly ash: 90kg;

[0121] S95 grade mineral powder: 170kg;

[0122] 70-120 mesh quartz sand: 260kg;

[0123] Rubber powder 8031H: 45kg;

[0124] Rubber powder 5011L: 25kg;

[0125] Cellulose ether 10007P4: 1.3kg;

[0126] Thixotropic lubricant 602: 9 kg.

[0127] Preparation method and construction method are the same as embodiment 1.

[0128] The performance test after construction treatment according to the aforementioned construction method is as follows:

[0129] (1) The appearance color is basically the same as the matrix color of the concrete component;

[0130] (2) Low water absorption, the water absorption of the Caston tube is 0.7ml in 5 hours;

[0131] (3) Scrub resistance, can withstand 20,000 times of scrubbing without revealing the bottom;

[0132] (4) No obvious pan-alkaline phenomenon;

...

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Abstract

The invention relates to a concrete member mending agent which comprises concrete, coal ash, mineral powder, quartz sand, redispersible gelatine powder, water-retaining agent and thixotropic lubricant. The invention further relate to preparation method and construction method of the mending agent. The color of the mending agent is basically consistent with the color of a concrete member after hardening, and the mended concrete member has good appearance. The mending agent provided by the invention has longer service life, is wipe-wash-resistant and high in binding strength, and no secondary cracking can occur after mending. The preparation method and the construction method are simple and easy to implement.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a repairing agent for concrete components, a preparation method thereof and a construction method of the repairing agent. Background technique [0002] During the current construction process, concrete structures are generally prone to appearance quality defects such as honeycomb pockmarks, sand holes, water lines, exposed stones, air bubbles, and cracks. The main reasons are: the quality of raw materials fluctuates greatly, and the concrete mix ratio has not been adjusted effectively in time, resulting in bleeding, segregation and foaming; the concrete mixing time is seriously insufficient, resulting in poor homogeneity of the concrete after pouring. Poor; improper concrete pouring method and leakage or over-vibration during vibration, resulting in concrete segregation; early maintenance of concrete is not timely, resulting in cracks on the surface of the structure. [0003] W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B28/04E04G21/02E04G23/02E01D21/00E01D22/00E21D11/10E01B31/20
Inventor 孙建新侯希承宋胜林薄春莲
Owner CHINA RAILWAY 19 BUREAU GRP CO LTD
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