Portland cement a hydraulic cement produced by pulverizing clinker consisting essentially of hydraulic calcium silicates, usually contains one or more of the forms of calcium sulfate as an interground addition.
Sulfate resisting cement (SRC) type V is usually used when high sulfate resistance is desired.
Sulfate resisting cement is conforming to the American Standards ASTMC 150 as follows:
| Magnesium Oxside (Mgo) max% | 6 |
| Sulfur Trioxside (So3) max% | |
| When C3A is 8% or less | 2.3 |
| Loss on ignition max% | 3 |
| Insoluble residue max% | 0.75 |
Physical specification
The product is conforming to the American Standards. ASTMC 150 requirement as follows:
| Air Content of Morter volume % | 12 |
| Fineness, Specific surface, M2/kg by air per meability test to minimum | 280 M2/kg |
| Autoclave expansion max % | 0.8 |
Strength not less than the values shown for the ages indicated as follows:
| 3 Days | 8 (1160) |
| 7 Days | 15 (2180) |
| 28 Days | 21 (3050) |
Time of setting using vicat test:
| Initial set, not less than | 45 minutes |
| Final set, not more than | 375 minutes |
