A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-alkali cement grinding aid and preparation method thereof
The invention belongs to the field of chemical building materials, and particularly to a high-alkali cement grinding aid and a preparation method thereof. In the prior art, high-alkali cement is subjected to rapid hydration at the early stage so as to cause easy concrete cracking at the early stage, not high concrete strength at the later stage, and the like. The technical problem solved by the present invention is to provide a high-alkali cement grinding aid so as to improve the problems in the prior art. The high-alkali cement grinding aid comprises, by weight, 80-95% of a grinding aid component, 1-10% of a gel crystal seed improver, and 0.5-10% of an auxiliary agent, wherein the grinding aid component is an alcohol amine grinding aid, and the gel crystal seed improver is a C-S-H gel crystal seed improver. According to the present invention, the cement specific surface area can be increased by 11-25 m<2>/Kg in the same grinding time, the 45 [mu]m screen residue is reduced by 3-6%, the coagulation time is prolonged by 20-30 min, the shrinkage rate is less than 0.006%, and the 28 d cement mortar strength is increased by 10-15%.
High-alkali cement grinding aid and preparation method thereof
The invention belongs to the field of chemical building materials, and particularly to a high-alkali cement grinding aid and a preparation method thereof. In the prior art, high-alkali cement is subjected to rapid hydration at the early stage so as to cause easy concrete cracking at the early stage, not high concrete strength at the later stage, and the like. The technical problem solved by the present invention is to provide a high-alkali cement grinding aid so as to improve the problems in the prior art. The high-alkali cement grinding aid comprises, by weight, 80-95% of a grinding aid component, 1-10% of a gel crystal seed improver, and 0.5-10% of an auxiliary agent, wherein the grinding aid component is an alcohol amine grinding aid, and the gel crystal seed improver is a C-S-H gel crystal seed improver. According to the present invention, the cement specific surface area can be increased by 11-25 m<2>/Kg in the same grinding time, the 45 [mu]m screen residue is reduced by 3-6%, the coagulation time is prolonged by 20-30 min, the shrinkage rate is less than 0.006%, and the 28 d cement mortar strength is increased by 10-15%.
High-alkali cement grinding aid and preparation method thereof
LONG WEIHONG (author) / ZENG JUN (author) / ZHANG DAKANG (author) / FENG FANGBO (author) / MING JINLONG (author)
2015-08-12
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Cement grinding aid containing modified alkali lignin and preparation method thereof
| European Patent Office | 2022
Liquid grinding aid for high-alkali cement and preparation method of liquid grinding aid
| European Patent Office | 2024
Low-chloride and low-alkali composite cement grinding aid and preparation method thereof
| European Patent Office | 2016
Cement grinding aid, preparation method thereof and cement
| European Patent Office | 2023
Cement grinding aid, preparation method thereof and cement
| European Patent Office | 2022