Effect Of Water-Cement Ratio On Performance Of Seaweed-Modified Mortars
Table 3:
| W/C ratio | 28 days in normal climate (N/mm2) | 21 days in normal climate, 7 days in water (N/mm2) | 28 days at normal climate* (N/mm2) | |
| Cement 21% | 0.48 | 52±1 | 46±1 | 60±1 |
| 0.52 | 48±1.5 | 41±1.5 | 57±0.9 | |
| 0.56 | 44±0.3 | 38±1.5 | 43±0.9 | |
| 0.6 | 38.1±0.7 | 31.1±1.5 | 43±1 | |
| Cement 24% | 0.41 | 56.7±1.5 | 51±1.5 | 65±0.9 |
| 0.45 | 52.4±1.5 | 46.2±1.5 | 61±1 | |
| 0.49 | 48.1±1 | 42±1.5 | 56±1 | |
| 0.52 | 45±.6 | 37±1 | 52±0.5 | |
| Cement 27% | 0.37 | 62±1 | 56±1 | 74±1 |
| 0.4 | 58±1.5 | 53±1.5 | 69±0.5 | |
| 0.43 | 54±1 | 47±1 | 64±1 | |
| 0.46 | 49±0.5 | 42±0.5 | 60±1 | |
| Cement 30% | 0.33 | 67±1.5 | 57±0.5 | 81±0.3 |
| 0.36 | 62±1.5 | 55.2±0.5 | 73±1 | |
| 0.38 | 59±0.5 | 53±1 | 70±1 | |
| 0.41 | 53±0.5 | 45±0.3 | 61±1.5 | |
| Without Seaweed powder (GracilariaSp.) cement 21% | 0.48 | 58±1.5 | 54±1.5 | 61±1.5 |