What is gypsum mortar and it's main technical parameters?
Author：ANT CONSTRUCTIONS Comefrom： Createdate：2021/6/15 9:13:03 Hits：94
What is gypsum mortar and it's main technical parameters
What is gypsum mortar?
Gypsum mortar, also called plaster of Paris, was used in the construction of many building wall decoration materials. Gypsum mortar is a newer, more environmental friendly, and more economical product promoted in China instead of cement mortar. It not only has the strength of cement, but is also healthier, environmental friendly, as well as durable, strong adhesion, not easy to chalk, no cracking, no hollowing, no powder drop, etc., easy to use and cost saving. In aspect of unit price, plastering gypsum mortar is more expensive than cement mortar, but plastering gypsum mortar has many advantages. Taken together, the cost of plastering gypsum mortar per square meter is lower than cement mortar.
What are the main raw materials of gypsum mortar?
Gypsum mortar mainly includes gypsum powder, expanded perlite, cement, sand and chemical additives.
Main parameters of gypsum mortar
Items | Unit | Standard index |
Bulk density | kg/m³ | ≤1000 |
Initial setting time | h | ≥1 |
Final setting time/water retention rate | h | ≤8 |
Flexural strength | MPa | ≥1.0 |
Compressive strength | MPa | ≥2.5 |
Tensile bonding strength | MPa | ≥0.3 |
Internal Exposure Index | - | ≤1.0 (Class A) |
External exposure index | - | -≤1.3 (Class A) |
Thermal conductivity | W/(m·k) | ≤0.23 |
Shrinkage rate | % | ≤0.05 |
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