| 04332 Compressive Strength of Blocks
The following are the minimum compressive strength requirements for blocks at the age of 28 days. The mix proportions of the material components are to be adjusted as required to obtain the required compressive strength.
043321 Hollow block
Class Average of 6 Blocks Individual Block
Class A 42kg/cm2 38kg/cm2
Class B 35kg/cm2 32kg/cm2
Class C 20kg/cm2 18kg/cm2
* Class AA 70kg/cm2 65kg/cm2
* Class AAA 50kg/cm2 46kg/cm2
Class AA is for load bearing wall below grade
Class AAA is for load bearing wall above grade
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