A two-component low-viscosity base crack rapid repair material

Abstract

The invention relates to a two-component low-viscosity base crack quick repair material, the repair material is composed of A component and B component; wherein the A component is composed of rapid hardening sulfoaluminate cement 70 in parts by weight Parts, 10~12 parts of fly ash, 3~5 parts of silica fume, 50 parts of quartz powder, 0.2~0.3 parts of water reducing agent, 3 parts of expansion agent, 0.1 part of defoamer, 0.42~0.45 parts of boric acid, 0.0 parts of cellulose ~0.2 parts are mixed; the B component is prepared by mixing 12 parts of carboxylated styrene-butadiene latex and 38.25~46.75 parts of water in parts by weight. After testing, the repairing material of the present invention has the characteristics of good fluidity, fast setting time, low elastic modulus, high early strength, high bonding strength, etc., can realize pressure-free rapid grouting construction, and cooperate well with the base layer to withstand stress.

Description

technical field [0001] The invention relates to a rapid repair material for base cracks, in particular to a two-component low-viscosity rapid repair material for base cracks. Background technique [0002] The base layer has the advantages of high strength, high bearing capacity, and strong board structure. The use of the base layer meets the requirements of "strong base and thin surface" in the pavement structure form, and the construction cost is low. The pavement form of expressways in my country is mainly based on semi-rigid base asphalt pavement, and the use of semi-rigid base has accounted for 95% of asphalt pavement. However, due to the nature of temperature shrinkage and dry shrinkage of semi-rigid materials, when the external environment changes and uneven subsidence occurs, it is easy to cause cracks in the semi-rigid base, and the cracks will form reflections on the pavement surface along the pavement structure. Cracks have a serious impact on the performance of t...

AI Technical Summary

Problems solved by technology

[0004] However, the existing crack repair materials often have the following problems: when dealing with cracks in the base, they often encounter the problems of low bond strength and high elastic modulus, and the base and crack repair materials cannot be well bonded together, which cannot achieve the desired results. The role of bonding the base layer into one; large traffic volume, many heavy-duty vehicles, and large impact loads greatly shorten the service life of crack repair materials with too high elastic modulus

In addition, when the base cracks are filled, due to the high viscosity of the filling material, the small cracks cannot be filled, resulting in a situation where it seems to be filled, but in fact only the wider part above is filled, and the construction quality cannot be guaranteed.

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