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Systematic Experimental Assessment of POFA Concrete Incorporating Waste Tire Rubber Aggregate
Akram M Mhaya1, S Baharom1, Mohammad Hajmohammadian Baghban2
1Department of Civil Engineering, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia.
Polymers
|June 10, 2022
Summary
Palm oil fuel ash (POFA) concrete with recycled tire rubber aggregates (TRAs) shows promising mechanical properties. This sustainable approach enhances rubberized concrete strength and addresses waste tire issues.
Area of Science:
- Materials Science
- Civil Engineering
- Sustainable Construction
Background:
- Recycled tire rubber incorporation in concrete often reduces mechanical strength.
- Supplementary cementitious materials are explored to mitigate strength reduction in rubberized concrete.
Purpose of the Study:
- To assess the mechanical properties of palm oil fuel ash (POFA)-based concrete with tire rubber aggregates (TRAs).
- To investigate the effectiveness of POFA and TRAs in improving rubberized concrete performance.
Main Methods:
- Systematic experimental work using response surface methodology (RSM).
- Incorporation of recycled tire fibre and fine TRAs as partial replacement for sand.
- Mechanical property testing (compressive, flexure, tensile strength) at 365 days.
Main Results:
- Reasonable compressive, flexure, and tensile strengths achieved with up to 10% TRA replacement.
- POFA concrete with fibre rubber showed reduced strength reduction (16.3% compressive, 9.8% tensile, 10.1% flexural) at 365 days compared to control concrete.
- Strength reduction was mitigated by combining POFA with TRAs.
Conclusions:
- Combining POFA and TRAs is a beneficial strategy to enhance rubberized concrete strength.
- This approach offers a sustainable solution for waste tire management and concrete improvement.
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