High-flowing micro-expansion anti-dilution grouting agent

A micro-expansion and anti-dilution technology, applied in the field of grouting agent, can solve problems such as accelerating the failure of concrete pavement, achieve excellent fluidity, overcome secondary stress concentration, and avoid effective separation.

Inactive Publication Date: 2011-09-14
交通运输部公路科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the secondary hollowing of the concrete panel caused by the mismatch between the strength of the grouting agent existing at the bottom of the existing cement concrete road slab and the strength of the base layer, thereby accelerating the destruction of ...

Method used

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  • High-flowing micro-expansion anti-dilution grouting agent

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Effect test

Embodiment 1

[0026] High-fluidity micro-expansion anti-dilution grouting agent for voiding the bottom of cement concrete road slabs, the formula is as follows: fine sand content 65%, fly ash content 25%, SF-1 high-efficiency water reducer content 0.5%, anhydrous The content of early strength agent composed of sodium sulfate and microsilica powder is 0.5%, the content of UEA expansion agent is 9%, and the content of aluminum powder air-entraining agent is 0%. When carrying out grouting treatment at the bottom of the slab, the present invention and cement are added into water, and mixed evenly for use. The blending ratio is: 20% of water, 32% of cement, and 48% of the high fluidity micro-expansion anti-dilution grouting agent.

Embodiment 2

[0028] High-fluidity micro-expansion anti-dilution grouting agent for voiding the bottom of cement concrete road slabs, the formula is as follows: fine sand content 75%, fly ash content 15%, SF-1 high-efficiency water reducer content 0.6%, anhydrous The content of early strength agent composed of sodium sulfate and microsilica powder is 0.6%, the content of UEA expansion agent is 8.8%, and the content of aluminum powder air-entraining agent is 0%. When carrying out grouting treatment at the bottom of the slab, the present invention and cement are added into water, mixed evenly and used. The blending ratio is: 22% of water, 30% of cement, and 48% of the high-fluid micro-expansion anti-dilution grouting agent.

Embodiment 3

[0030] High-fluidity micro-expansion anti-dilution grouting agent for voiding the bottom of cement concrete road slabs, the formula is as follows: fine sand content 82%, fly ash content 17%, SF-1 high-efficiency water reducer content 0.7%, anhydrous The content of early strength agent composed of sodium sulfate and microsilica powder is 0.3%, the content of UEA expansion agent is 0%, and the content of aluminum powder air-entraining agent is 0%. When carrying out grouting treatment at the bottom of the slab, the present invention and cement are added into water, mixed evenly and used. The blending ratio is: 23% of water, 31% of cement, and 46% of the high fluid micro-expansion anti-dilution grouting agent.

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Abstract

The invention relates to a high-flowing micro-expansion anti-dilution grouting agent used for cement concrete pavement slab suspending, which consists of 0-85% of fine sand, 14-85% of fly ash, 0.5-1.5% of water reducing agent, 0-1% of early strength agent, 0-25% of expansion agent and 0-5% of air-entraining agent. In the cement concrete pavement slab suspending, cement and water also need to be added in the high-flowing micro-expansion anti-dilution grouting agent, and evenly stirred for use, so that the grouting agent does not have bleeding lamination or shrinking, can compensate the shrinking of slurry or has certain expansion property, and serum is even, not easy to be diluted by moisture below a slab, and good in quality, and has the function of preventing water immersion, so as to enable 24-hour strength of a grouting material to reach above 3.5 MPa which is matched with the compressive strength of a base layer to be grouted, ensure a concrete face to obtain uniform support of a bottom plate again, and prolong the service life of the concrete face.

Description

technical field [0001] The invention relates to a grouting agent used in the technical field of grouting at the bottom of cement concrete pavement slabs, in particular to a high-fluid micro-expansion anti-dilution grouting agent used in the technology of grouting at the bottom of cement concrete pavement slabs . Background technique [0002] Cement concrete pavement will be damaged to varying degrees under the long-term repeated action of road traffic loads, among which the void at the bottom of the slab is the most common damage status of concrete pavement. Under normal circumstances, for a panel that is evenly supported, the stress at the position where the load acts is small. Once the corner of the empty panel is in a cantilever state due to the loss of foundation support, excessive stress and shear force will be generated in the panel, and the concrete panel will soon reach the limit. life. The grouting treatment can improve the original stress state of the slab bottom...

Claims

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Application Information

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IPC IPC(8): C04B18/08C04B28/00C04B14/06
CPCC04B28/02C04B40/0039Y02W30/91C04B14/06C04B18/08C04B18/146C04B20/0076C04B22/008C04B22/04C04B22/147C04B38/02C04B2103/302C04B7/323C04B2103/10C04B2103/304C04B40/0028
Inventor 杜天玲付智覃润浦田波罗翥王稷良刘英王大鹏潘昊宇彭鹏
Owner 交通运输部公路科学研究院
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