INITIAL SETTING TIME
The time period elapsing between the time, water is added to the cement and the time, the needle fails to pierce the test block by 5.0 ± 0.5 mm measured from the bottom of the mould, is the initial setting time.
The initial setting is the time when the chemical reaction between cement and water starts (paste starts losing its plasticity), and it should be not less than 30 minutes without an additive.
FINAL SETTING TIME
The period elapsing between the time, water is added to the cement and the time, the needle makes an impression on the surface of the test block, while the attachment fails to do so, is the final setting time.
Final setting is the time when the chemical reaction between cement and water is finished (The time at which cement completely loses its plasticity and became hard is a final setting time of cement) and for Ordinary Portland Cement, The Final Setting Time is 600 min.
Type of cement |
Initial setting time Min. (minutes) |
Final setting time Min.
| |
| Ordinary Portland cement (OPC) 33 GRADE | 30 | 600 | |
| Ordinary Portland cement (OPC) 43 GRADE | 30 | 600 | |
| Ordinary Portland cement (OPC) 53 GRADE | 30 | 600 | |
| Portland Pozzolana Cement (PPC) | 30 | 600 | |
| Portland Slag Cement (PSC) | 30 | 600 | |
| Portland Slag Cement (PSC) | 30 | 600 | |
| Rapid Hardening Portland Cement (RHPC) | 30 | 600 | |
| High Alumina cement | 30 | 600 | |
| Low heat cement | 60 | 600 | |
| Masonary cement | 90 | 1440 |
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