Masonry cement having higher strength and water retention

Abstract

The invention discloses a masonry cement with high strength and water retention. According to the weight percentage, the masonry cement consists of 21-98.99 percent of porland cement clinker, 0-50 percent of blending materials, 1-12 percent of gypsum, 0.01-2 percent of cellulose ether and 0-15 percent of other additives. With the cellulose ether of high water retention material added, the water retention of the masonry cement is greatly improved. At the same time, through breaking through the limitation that the using amount of the blending materials in the original masonry cement is not less than 50 percent, the using amount of the blending materials is lowered to be 50 percent below to improve the strength of novel masonry cement. The strength of the prepared masonry cement is high, and the masonry cement with the strength grades of 12.5, 22.5, 52.5R, 62.5, 62.5R, etc. can be made. The hard problems of using low-grade blending materials to produce masonry cement with high water retention and using low- grade strength masonry cement of 12.5 and 22.5 to produce high-grade strength building mortar are solved.

Description

technical field [0001] The invention belongs to the field of masonry cement, in particular to a novel masonry cement with high strength and water retention. Background technique [0002] Masonry cement is mainly used for masonry and plastering mortar and cushion concrete. According to the requirements of the national standard GB / T3183-2003 "Masonry Cement", masonry cement is composed of one or more mixed materials, silicate Cement clinker and gypsum are finely ground hydraulic cementitious materials with good workability. The amount of mixed materials in masonry cement should be more than 50%, and the water retention rate of masonry cement should not be lower than 80%. [0003] Traditional masonry cement is mainly used with ordinary fired bricks. Since the water retention rate of masonry cement is not high, ordinary fired bricks need to be watered before use (also known as wet construction) in order to increase the bond between mortar and bricks. force. Since ordinary sint...

AI Technical Summary

Problems solved by technology

Because the water gel in the mortar is relatively large, the strength of the mortar is usually only about half of the cement strength, that is, the cement of the 12.5 and 22.5 strength grades can only be used to prepare mortars of M5 and M10 grades, and it is relatively difficult to prepare high-strength mortars above M15. Difficult, and the amount of cementitious material is large, which is not conducive to environmental protection, so it is necessary to prepare a new type of masonry cement with higher strength grade and high water retention