Hydroxypropyl Methyl Cellulose in the Application of Putty and Problem Analysis!

Neutral Putty:

Depowder: insufficient cementitious material, insufficient cellulose water retention, low calcium content of heavy calcium 

Construction performance: improved by bentonite and starch ether 

Empty drum; And wall adhesion caused by inadequate 

Layering: interface processing 

Strength: Can also be adjusted by grading calcium powder

Lime Calcium Putty: 

The problems are empty drum, desilting yellowing, construction is not good, desilting, delamination, cracking, thickening 

Depowder: insufficient cementitious material, insufficient cellulose water retention or insufficient amount of addition, lime calcium is not pure 

Poor construction performance: bentonite and starch ether to improve 

Empty drum; And insufficient wall adhesion caused by the appropriate addition of latex powder 

Layering: interface processing 

Yellowing: Improper cellulose selection 

Cracking: base cracking or too hard cracking strength, coating too thick 

After thickening: heavy calcium water absorption rate is different, it is recommended to choose zero water absorption or very low heavy calcium powder; Gray calcium contains undigested GaO.

Cement-based Putty: 

Problems for empty drum, construction is not good, depowder, delamination, cracking, insufficient water resistance, false coagulation 

Depowder: insufficient cementitious material, insufficient cellulose water retention or insufficient amount of addition 

Poor construction performance: bentonite and starch ether to improve 

Empty drum; And wall adhesion caused by insufficient, reasonable addition of latex powder 

Layering: interface processing 

Yellowing: Improper cellulose selection 

Insufficient water resistance: insufficient latex powder and insufficient cementitious materials 

Cracking: base cracking or too high strength cracking, coating is too thick, with putty to fill the hole 

False coagulation: sodium gluconate can be added to prolong the operational time