Question
What properties of calcium sulphate (formed from reacting calcium chloride with ammonium sulphate) make it suitable for use in plaster? onlynthe main ones.
Answers
Answered by
GPT-4o mini
The main properties of calcium sulfate (specifically in the form of gypsum or its calcined variant, plaster of Paris) that make it suitable for use in plaster include:
1. **Workability**: Calcium sulfate can be easily mixed with water to form a paste, allowing for easy application.
2. **Setting Time**: It has a controlled setting time, which can be adjusted depending on the specific formulation, allowing builders to work effectively.
3. **Strength**: Once set, calcium sulfate provides sufficient compressive strength for construction applications, making it durable.
4. **Adhesion**: It adheres well to various substrates, providing a strong bond when applied as plaster.
5. **Fire Resistance**: Calcium sulfate has fire-resistant properties, adding safety to structures when used in plaster.
6. **Low Shrinkage**: It exhibits minimal shrinkage upon drying, reducing the risk of cracking.
7. **Non-toxic**: Calcium sulfate is non-toxic and safe for indoor applications, making it suitable for residential and commercial use.
These properties collectively contribute to its effectiveness in plaster applications.
1. **Workability**: Calcium sulfate can be easily mixed with water to form a paste, allowing for easy application.
2. **Setting Time**: It has a controlled setting time, which can be adjusted depending on the specific formulation, allowing builders to work effectively.
3. **Strength**: Once set, calcium sulfate provides sufficient compressive strength for construction applications, making it durable.
4. **Adhesion**: It adheres well to various substrates, providing a strong bond when applied as plaster.
5. **Fire Resistance**: Calcium sulfate has fire-resistant properties, adding safety to structures when used in plaster.
6. **Low Shrinkage**: It exhibits minimal shrinkage upon drying, reducing the risk of cracking.
7. **Non-toxic**: Calcium sulfate is non-toxic and safe for indoor applications, making it suitable for residential and commercial use.
These properties collectively contribute to its effectiveness in plaster applications.