Publication: Influence Of Palm Oil Fuel Ash As A Supplementary Binder On Properties Of Self-Compacting Concrete
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Date
2014-03
Authors
Zainul, Zainurul
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Abstract
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.