Molda Marbre is a high strength alpha formulated plaster, controlled expansion used for rooftiles press. It can be also used in ceramics for production of case moulds or manufacturing of decorative element for giftware and "stuc".
High strength
Controlled expansion
| Mechanical Properties | |
|---|---|
| Brinell Hardness (MPa) | 125 |
| Dry compressive strength (Mpa) | 36 |
| Flexural Strength (MPa) | 12 |
| Chemical Properties | |
|---|---|
| Chemical Composition | CaSO4.1/2H2O |
| Chemical Name | Calcium sulphate hemihydrate |
| Colour | White |
| Minimum gypsum purity % | 95 |
| Setting Parameters | |
|---|---|
| Initial setting time (minutes) | 11.5 |
| Vicat Ring Fluidity (cm) | 21 |
| Physical Properties | |
|---|---|
| Loose bulk density (kg/m³) | 1075 |
| Particle Size (% weight retained) | ≤ 1.00 % at 100 µm |
| Plaster to Water Ratio | |
|---|---|
| Plaster to water mix ratio (by weight) | 100/33 |
| Plaster to Water Ratio (by weight) | 3.00:1 |
| Water to plaster ratio (by weight) | 33% |
The recommended mixing time is approx. 2 to 4 minutes, depending on batch size. The precise consistency to use will need to be adjusted to suit the individual application. Changes to plaster to water ratio will influence product performance particularly setting time, strength and permeability.Depending on quality and preparation, the clay has a varying tendency to stick to the mould. Therefore the pwr may be adjusted within the above ranges. Depending on the quantity, the tendency to stick increases as the pwr increases. When inserting on the press, the lowest ratio should be tested first, followed by increasing increments to determine the optimum ratio.
Packaging available : 25 kg
Shelf life : 8