Building mortar densification powder and preparation

Abstract

The invention discloses construction sand pulp thickening powder which comprises magnesium clay and mixed material powder; the weight portions and proportions thereof are as follows: 90 portions of magnesium clay and 10 portions of mixed material powder; the mixed material powder comprises salt gypsum, glauber salt, naphthalene-based water reducer, Alpha-alkenyl sulphonate, starch ether, trimericsodium phosphate and redispersible glue powder; the weight portions and proportions of each material are as follows: 45 to 55 portions of salt gypsum, 35 to 45 portions of glauber salt, 2 portions ofnaphthalene-based water reducer, 0.9 portion of Alpha-alkenyl sulphonate, 1.6 portions of starch ether, 4 to 6 portions of trimeric sodium phosphate and 0.5 portion of redispersible glue powder. The construction sand pulp thickening powder can ensure the thickness, the layering degree, the anti-pressing intensity, the coagulating time and the shrinkage factor of the sand pulp simultaneously when greatly reducing the cement consumption, replaces the lime in the construction sand pulp, realizes energy saving and waste utilizing, reduces the construction cost, protects environment, has good use effect, effectively improves various performance indexes of the sand pulp, and has simple preparing technique, low cost as well as appreciable market prospect.

Description

technical field [0001] The invention relates to an admixture for building mortar, in particular to a building mortar thickening powder and a preparation method thereof. Background technique [0002] Construction mortar generally refers to masonry, plastering and floor mortar used in masonry and concrete structures. Traditional construction mortar can be divided into mixed mortar and cement mortar. Cement mortar has poor workability and workability, segregation and sedimentation, serious bleeding, fast coagulation, and difficult operation. For parts that do not require high strength, excessive use of cement is still a waste. The mixed mortar uses cement and lime paste as the cementitious material. Although it improves the workability of the mortar and saves the amount of cement used, it has disadvantages such as poor water resistance, weather resistance, large shrinkage rate, and low bonding. Furthermore, lime Burning wastes resources and pollutes the environment. In rece...

AI Technical Summary

Problems solved by technology

Cement mortar has poor workability, poor workability, segregation and precipitation, severe bleeding, fast coagulation, and difficult operation

For parts that do not require high strength, excessive use of cement is still a waste

The mixed mortar uses cement and lime paste as the cementitious material. Although it improves the workability of the mortar and saves the amount of cement used, it has disadvantages such as poor water resistance, weather resistance, large shrinkage rate, and low bonding. Furthermore, lime Burning wastes resources and pollutes the environment

In recent years, in order to solve the existing problems of construction mortar, an additive is mixed with fly ash and then added to the mortar to replace part of the lime paste to improve workability and workability. These additives are mostly liquids such as rosin base The air-entraining agent, after being added, will cause tiny air bubbles to make the mortar fluffy and soft, but the amount of air-entraining agent used is extremely difficult to control, and a slight mistake will cause quality accidents, poor bubble stability, unstable mortar volume, and common mortar Therefore, in some big cities and important projects, this product is basically not used, and even banned

There are also some scientific researchers referring to foreign experience, trying to develop a technical product called thickening powder or plasticizing powder that can be used in mortar, but in the end they failed due to unreasonable material composition, poor effect, or high cost. extensive promotional use