Effect Of Water-Cement Ratio On Performance Of Seaweed-Modified Mortars
Table 5:
| W/C ratio | 28 days in normal climate (N/mm2) | 21 days in normal climate, 7 days in water (N/mm2) | 90 days normal climate* (N/mm2) | 28 days at normal climate* (N/mm2) | |
| Cement 21% | 0.48 | 12.3±0.5 | 9.45±1 | 12.8±1 | 9.6±1 |
| 0.52 | 11±1 | 8.4±1.5 | 12±0.9 | 9.5±0.9 | |
| 0.56 | 11±0.5 | 7.12±1 | 10.5±0.9 | 8.9±0.9 | |
| 0.6 | 9.7±0.5 | 7.12±1 | 10.5±1 | 6.5±1 | |
| Cement 24% | 0.41 | 12.8±1.5 | 10.4±0.5 | 13±0.9 | 9.9±0.9 |
| 0.45 | 12.4±1.5 | 9.5±1 | 12.5±1 | 9.7±1 | |
| 0.49 | 11.3±1.5 | 8.2±1 | 11.3±1 | 8.7±1 | |
| 0.52 | 11.1±0.5 | 7.5±1.5 | 11.6±0.5 | 8.7±1 | |
| Cement 27% | 0.37 | 13.3±1.5 | 12.8±1 | 13±1 | 7.8±0.5 |
| 0.4 | 13±1 | 11.3±1 | 12±0.5 | 11.8±1 | |
| 0.43 | 12.5±1 | 10.3±1 | 11.2±1 | 11.7±0.5 | |
| 0.46 | 11.6±0.5 | 8.5±1 | 11.8±1 | 10.2±1 | |
| Cement 30% | 0.33 | 13.4±1.5 | 13.3±0.5 | 13.3±0.3 | 12.2±1.5 |
| 0.36 | 12.7±1.5 | 11.5±0.5 | 12.3±1 | 12±1 | |
| 0.38 | 13.2±0.5 | 11.3±1 | 13.7±1 | 11±1 | |
| 0.41 | 12.8±1 | 9.2±0.3 | 13.1±1.5 | 9.5±1.5 | |
| Without Seaweed powder (GracilariaSp.) cement 21% | 0.48 | 7.5±0.5 | 7.9±0.3 | 7.5±1 | 6.8±0.5 |