High-perturbance underwater masonry mortar

Abstract

High-perturbance underwater masonry mortar is prepared from, by mass, 50 parts of special rapid hardening cement, 220 parts of Portland cement, 15 parts of resin rubber powder, 675-685 parts of natural medium sand, 30-40 parts of an anti-perturbance additive and 40-50 parts of waterborne epoxy resin. The anti-perturbance additive is prepared from, by mass, 1-5 parts of silica powder, 2-5 parts of hydroxypropyl methylcellulose, 0.5-1 part of a super plasticizer, 5-8 parts of a thixotropic agent, 5-8 parts of special rapid hardening cement, 12-15 parts of a flocculating agent and 5-8 parts of an early strength agent. By adding the special rapid hardening cement, the underwear initial setting time of the mortar is short; by adding the waterborne epoxy resin and the silica powder, the surface of the mortar has high affinity, and the mortar is suitable for underwater repair. The high-perturbance underwater masonry mortar is reasonable in formula and convenient to prepare and use, and has the advantages of being not likely to disperse, easy to construct, capable of normally hardening underwater, high in strength and the like in work with water.

Description

technical field [0001] The invention relates to the technical field of underwater masonry construction, in particular to a highly disturbed underwater masonry mortar. Background technique [0002] At present, there are many difficulties in the construction of underwater concrete projects, one of which is the easy dispersion of concrete in high-disturbance environments. At present, the construction or damage of underwater concrete buildings generally adopts building cofferdams, draining water, and then pouring concrete Or build the body of wall by laying bricks or stones, plaster mortar to finish, this kind of method is time-consuming, labor-intensive and expensive. Another method is to use chutes, conduits, pumps, and open-bottom containers to transport ordinary concrete or mortar to the underwater pouring or repairing position without building cofferdams or pumping water. The ordinary underwater concrete used in this method Or the mortar is easy to segregate when it meets ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-disturbance underwater masonry mortar. By adjusting the proportion of the foundation mortar and adding a special anti-disturbance admixture, the purpose is to solve the problem of mud mortar or concrete under water or high disturbance. It is easy to segregate when exposed to water, the cement is easy to lose, and the sand and gravel are easy to separate, which will affect the hardening and the performance of concrete or mortar. , short-term rapid formation of good hardening, good strength retention rate in the later period

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