Mortar Types
Minimum required compressive strength and material quantities in mortar according ASTM C 270:
| ASTM Mortar Type | ||||
| M | S | N | O | |
| Strength (psi) | 2500 | 1800 | 750 | 350 |
| Volume Ratio | 1:1/4:3 | 1:1/2:4 1/2 | 1:1:6 | 1:2:9 |
| Proportions by Volume | ||||
| Cement | 0.33 | 0.22 | 0.17 | 0.11 |
| Lime | 0.08 | 0.11 | 0.17 | 0.22 |
| Sand | 1 | 1 | 1 | 1 |
| Proportions by Weight | ||||
| Cement | 31.3 | 20.9 | 15.7 | 10.4 |
| Lime | 3.3 | 4.4 | 6.7 | 8.9 |
| Sand | 80 | 80 | 80 | 80 |
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