A special admixture for high-performance underwater masonry mortar

Abstract

The invention discloses a special high-performance additive for underwater masonry mortar. The special high-performance additive is composed of, by weight, 2-5 parts of a thickening agent, 0.5-1 part of super plasticizer, 5-8 parts of a thixotropic agent, 5-8 parts of special cement, 12-15 parts of a set controlling agent and 5-8 parts of an early strength agent. In the special high-performance additive for the underwater masonry mortar, the thickening agent can improve the adhesiveness of a mixed product, and therefore the underwater non-disperse mortar is endowed with the properties of dispersing and separating resistance. The super plasticizer can improve the fluidity and workability of the mixed product, and therefore the material is endowed with good self-leveling and self-compacting properties. The frequently-used super plasticizer mainly includes sulfonated resin or sulfonate, and therefore the material has the properties of underwater dispersing and separating resistance. Through the combined action of the doped special cement and the set controlling agent, the material is endowed with early strength and rapid hardening.

Description

technical field [0001] The invention relates to a special admixture for high-performance underwater masonry mortar. 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), which will affect the hardening and the performance of concrete or 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 underwater concrete or mortar that the second kind of w...

AI Technical Summary

Problems solved by technology

[0004] Although the existing public technology has listed the technical routes, proportions and related instructions of some special admixtures for underwater masonry mortar, the effect in actual use is general, and there is no clear construction process and product and construction technology description, which has led to practical problems. Use effect and meaning is not big