Application and problem analysis of hydroxypropyl methylcellulose in putty!
Neutral p
utty:
De pulverization: insufficient cementitious materials, insufficient water retention of cellulose and low calcium content of heavy calcium
Construction performance: improved by bentonite and starch ether
Empty drum; Caused by insufficient adhesion to the wall
Layering: interface processing
Strength: it can also be adjusted by calcium powder gradation
Grey calcium based putty:
The problems are hollowing, de pulverization and yellowing, poor workability, de pulverization, delamination, cracking and post thickening
De pulverization: insufficient cementitious materials, insufficient water retention of cellulose or insufficient addition, impure ash calcium
Poor construction performance: improved by bentonite and starch ether
Empty drum; Insufficient adhesion with the wall, resulting in appropriate addition of latex powder
Layering: interface processing
Yellowing: improper selection of cellulose
Cracking: the base course is cracked or the strength is too high, hard cracking, and the coating is too thick
Post thickening: the water absorption of heavy calcium is different, so it is recommended to select heavy calcium powder with zero water absorption or very low water absorption; Gray calcium contains undigested Gao.
Cement based putty:
The problems are hollowing, poor workability, de pulverization, delamination, cracking, insufficient water resistance and false coagulation
De pulverization: insufficient cementitious materials, insufficient water retention of cellulose or insufficient addition
Poor construction performance: improved by bentonite and starch ether
Empty drum; Due to insufficient adhesion with the wall, latex powder shall be added reasonably
Layering: interface processing
Yellowing: improper selection of cellulose
Insufficient water resistance: insufficient latex powder and insufficient cementitious materials
Cracking: the base course is cracked or the strength is too high, the hard cracking, the coating is too thick, and the holes are filled with putty
False coagulation: sodium gluconate can be added to prolong the operation time
{aspcms:comment}
