| Summary: | Palm oil fuel ash (pofa) obtained from a palm oil mill was subjected to
treatment process via sieving, grinding and heat treatment in order to improve its
particles size and its potential reactivity as pozzolanic material in self-compacting
concrete (sec). The treated pofa was then utilized as partial cement replacement in
the production of see with pofa contents of 0%, 20%, 40% and 60% by mass of
ordinary portland cement (opc). The properties of fresh scc mixes were explored
through slump flow, slump flow t5oo, l-box, sieve stability as well as proctor
penetration tests where the inclusion of pofa at replacement of 60% gave excellent
results which satisfied the stipulated requirement for scc. On contrary, the hardened
properties of see was evaluated through compressive strength, porosity, initial
surface absorption (i sat), gas permeability, water permeability, rapid chloride
permeability (rept) and rapid chloride migration (rmt) tests. The results
obtained indicated significant improvement in the hardened scc properties with the
inclusion of pofa. Sce with 40% pofa exhibits the greatest compressive strength
value which exceeded the targeted strength of 50 mpa. [n term of durability related
properties, all pofa-scc mixes showed better properties than the opc-sec, where
the mix containing 60 % pofa exhibiting the greatest improvement at 180 days of
water-curing period for all tests.
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