Performance of concrete by using pulverized fuel ash (PFA) as a cement replacement material

Through public concerns and research efforts, the coal combustion by-product
materials have potential to be utilized as construction material to replace
conventional ordinary Portland cement (OPC). Recycling the coal combustion byproduct
materials is the act of processing the waste material to creating an alternative
product. The used of pulverized fuel ash (PFA) as a pozzolanic material as a partial
cement replacement for producing concrete will reduce the environmental pollution
problems create by excessive production of cement, as well as the requirement for
disposing the ash. Mix design facilitates the percentage used of pulverized fuel ash
(PFA) concrete assessed together with the aggregates and cement. In this present
investigation, PFA concrete is mix according to 10%, 20% and 30% by weight of
cement replaced with PFA. The present study designed to determine the
effectiveness of PFA and discovered its potential as a partial cement replacement in
concrete. It is also to study the effectiveness of PFA concrete toward compressive
strength and durability in term of increasing its resistance toward chemical attacks
namely sulphate and acid. The continuation of pozzalanic activity in PFA concrete
would reduce the porosity of concrete at 90 days of curing age. The entire PFA
concrete specimens prepared consist of PFA-20% as partial cement replacement
material indicates the optimum usage of PFA. Conclusively, the introduction of PFA
as cement replacement in concrete as an alternative material would improve the
properties of PFA concrete.