High-flowing micro-expansion anti-dilution grouting agent

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...

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 the concrete pavement. To provide a new type of high-fluidity micro-expansion anti-dilution grouting agent for voiding at the bottom of cement concrete road slabs. Obtain uniform support at the bottom of the board, prolong its service life, and thus be more suitable for practical use and have industrial utilization value

Images