Strength of Binary and Ternary Blended Cement Pastes Containing Palm Oil Fuel Ash and Metakaolin Exposed To Sodium Sulphate

摘要

The compressive strength of binary (BBCP) and ternaryudblended cement pastes (TBCP) containing Palm Oil Fuel Ash (POFA) andudMetakaolin (MK) exposed to 3 % sodium sulphate solution has beenudstudied. The ordinary Portland cement (OPC) was partially replaced withudPOFA and MK on mass-for-mass basis. All specimens were first cured forud28 days in normal water and subsequently subjected to full immersion inudsodium sulphate solution for 150 days for the compressive strengthudevaluation. The results show that partial replacement of cement with POFAudand MK improved the durability of the cement pastes by reducing theuddamage caused by sulphate attack.