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Two gypsum plaster formulation are recommended below:

 Two gypsum plaster formulation are recommended below:

1. heavy gypsum plaster mortar formula

Gypsum powder (initial setting time 5-6 minutes) - 300 kg

Washed sand - 650 kg

Talc powder - 50 kg

Gypsum retarder - 0.8 kg

Cellulose ether HPMC (80,000-100,000 cps)—1.5kg

Thixotropic lubricant - 0.5 kg

The operating time is 60-70 minutes, the water retention rate is 96%, and the national standard water retention rate is 75%

 

2 .lightweight gypsum plaster mortar formula

Gypsum powder (initial setting time 5-6 minutes) — 850 kg

Washed sand - 100 kg

Talc powder - 50 kg

Gypsum retarder - 1.5 kg

Cellulose ether HPMC (40,000-60,000)—2.5 kg

Thixotropic lubricant - 1 kg

Vitrified beads - 1 cubic

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