Anpak RT is a formulated plaster produced from naturally occurring gypsum mineral. It is off-white in colour. This product is used in rooftiles indutry to produce high performance moulds for the production of clay rooftiles. This product can be used for both top and bottom moulds.
Designed for clay rooftiles pressing
Very high mechanical properties for longer mould life
Controlled expansion for dimmensionnal accuracy
| Chemical Properties | |
|---|---|
| Chemical Composition | CaSO4.½H2O |
| Chemical Name | Calcium Sulphate Hemihydrate |
| Colour | off-white |
| Mechanical Properties | |
|---|---|
| Dry compressive strength (Mpa) | 20 |
| Flexural Strength (MPa) | 6 |
| Hardness Shore D | 75 |
| Setting Parameters | |
|---|---|
| Initial setting time (minutes) | 5 - 16 |
| Linear Expansion (%) | < 0.22% |
| Vicat Ring Fluidity (cm) | 16 - 22 |
| Physical Properties | |
|---|---|
| Particle Size (% weight retained) | < 0.04% at 200 µm |
| Plaster to Water Ratio | |
|---|---|
| Plaster to water mix ratio (by weight) | 100/52 |
| Plaster to Water Ratio (by weight) | 1.90:1 |
| Water to plaster ratio ( by weight) | 52% |
The recommended plaster to water ratio is between 1.75:1 and 2.00:1, with a mixing time of approx. 2 to 4 minutes, depending on batch size. Mixing utensils should always be clean and free from set plaster. Use distilled water only. For consistent results, attention must be given to the correct proportioning and mixing of the plaster and water. Add the weighed quantity of plaster slowly into the measured volume of water and allow to soak. Do not mix fresh plaster with that which has been mixed for some time previously. Changes to plaster to water ratio will influence product performance, particularly setting time, strength and absorption capability.
Packaging available : 30 kg
Shelf life : 6 months