This study explored the possibility of using oyster shells as component of aggregates in the production of 5” CHB by determining its compressive strength and comparing this to the strength of 5” CHB taken from the construction site.
Twelve (12) samples using different proportions were produced by researchers and another three (3) samples were taken from the construction.
All the samples brought to the testing laboratory are below the required compressive strength for non-load bearing concrete hollow blocks. However, it is noteworthy that the samples with oyster shells have higher compressive strength compared with the samples taken from the construction site.
It was also found out that the lesser the number of pieces of CHB produced the higher is the compressive strength.
There are also significant differences among and between the 5” CHB produced using different proportions including the samples taken from the construction site.