Influence of Unground Palm Oil Fuel Ash (UPOFA) in Compressed Earth Brick (CEB) Properties

This paper presents the preliminary study of the Unground Palm Oil Fuel Ash (UPOFA) addition on the Compressed Earth Brick (CEB) characteristic. POFA as a by product of palm oil kiln was found out to have pozzolanic properties and could be used to create cementitious materials. Previous researches believed that original or unground POFA is not suitable as cement replacement due to its large particle size and porous structure. Compressed earth bricks of 100 x 50 x 25 mm with manual compaction with compression rate 2000 psi were produced with additional of UPOFA passing 300 µm sieve and it was discovered that the addition of 40% UPOFA could enhanced the bricks compressive strength up to 13.89 MPa and decrease the brick water absorption until 15.3%. Incorporating UPOFA in CEB production will definitely resulted in cost efficient considering cost saving in grinding process.

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