Mortar Types

ASTM 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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