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Mixture proportion of mortar specimens used in this study expressed as mass ratio.
| Substitution Ratio of Calcined Oyster Shell (wt.%) | Cement | Calcined Oyster Shell Powder | Sand | Water |
|---|---|---|---|---|
| 0% | 2 | 0 | 3 | 1 |
| 3% | 2 | 0.06 | 3 | 1 |
| 6% | 2 | 0.12 | 3 | 1 |
| 9% | 2 | 0.18 | 3 | 1 |
| 12% | 2 | 0.24 | 3 | 1 |
