Masonry mortar used in underwater alkaline environment

Abstract

The invention discloses masonry mortar used in an underwater alkaline environment. The masonry mortar comprises the following components, according to a weight ratio, 180-220 parts by weight of Portland cement, 30-50 parts by weight of special cement, 705-715 parts by weight of natural medium sand, 13-18 parts by weight of resin glue powder, and 30-40 parts by weight of a special additive. The special additive is mixed from 2-5 parts by weight of a thickening agent, 0.5-1 part by weight of a super-plasticizer, 5-8 parts by weight of a thixotropic agent, 12-15 parts by weight of an adjusting admixture, and 5-8 parts by weight of an early strength agent. The masonry mortar is adjusted by high-performance additives special for underwater masonry mortar, and resin materials good in alkaline resistance are added, so that the masonry mortar is prevented from undergoing a reaction in the alkaline condition, and hardening and mortar performance aren't affected. At last, the masonry mortar is not prone to disperse, good in construction, resistant to alkaline, normal in underwater hardening, and high in strength in a working condition with water.

Description

technical field [0001] The invention relates to a masonry mortar for underwater alkaline environment. Background technique [0002] When cement mortar or concrete is in the state of water or under high disturbance, the slurry will easily segregate when it encounters water (cement is easy to lose, sand and gravel are easy to separate), and some components will participate in the reaction under alkaline conditions, thus affecting hardening and concrete. or properties of mortar. In the past, the repair of construction or damage of underwater concrete buildings was generally completed by building cofferdams, draining water, and then pouring concrete or building walls and plastering mortar. This type of project has the disadvantages of time-consuming, labor-intensive and expensive. The second method is to use chutes, conduits, pumps, open bottom containers, etc. to transport ordinary concrete or mortar to the underwater pouring or repairing position to complete. But the common...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a masonry mortar for underwater alkaline environment to solve the problem that the existing cement mortar participates in the reaction under alkaline conditions and affects the performance of hardening and concrete or mortar