AWAM International Conference on Civil Engineering 2019 (AICCE'19) - Nibong Tebal - Malaysia (2019-08-21)

Compressive strength and Microstructural Characteristics of Binary Blended Cement Mortar Containing Palm Oil Fuel Ash
The study investigated the ability to utilize the ultra-fine treated palm oil fuel ash (u-TPOFA) as supplementary cementitious materials (SCMs) in the construction industry. The u-TPOFA was used as SCM to produce binary blended cement mortar (BBCM) at different replacement levels of 30, 40, 50 and 60 wt.% of ordinary Portland cement (OPC). The compressive strength (CS) was evaluated at different curing ages of 3, 7, 14, and 28 days. The test result showed that the CS development increased with curing age as expected in all cases and an observed relationship between the CS and replacement level of BBCM. The CS at early ages of BBCM was lower than the control binder mortar (CBM). However, the CS started to increase after 7 days of curing. The highest CS among all the BBCM was observed with replacement level of CBM at 30 wt.% from u-TPOFA which gives 81.7 MPa at 28 days, whereas the CBM gives the highest CS with the value of 83.73 MPa. The results indicated for the CS concurs with the phase changes based on XRD and TG analyses. The changes in CS was due to the formation of more C-S-H and C-A-S-H gel binders and less content of Ca(OH)2 remained in the structure.
Mr. Ramzi J Shaladi