UTHM Conference Portal, 4th International Conference on Civil and Environmental Engineering for Sustainability (IConCEES 2017)

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Effect of different sizes of palm oil fuel ash (POFA) towards physical properties of modified bitumen
Raja Nurul Afiqah Raja Zulkefli, Haryati Yaacob, Ramadhansyah Putra Jaya, Muhammad Naqiuddin Mohd Warid, Norhidayah Hassan, Mohd Rosli Hainin, Mohd Khairul Idham Mohd Satar

Last modified: 2017-11-07


In the past decades, numerous numbers of studies have been carried out to find ways enhancing properties of bitumen. Other than using polymer, agricultural waste such as palm oil fuel ash (POFA) is one of the waste products that can be used to modify bitumen. In this study, the physical and rheological properties of POFA modified bitumen were examined based on different grinding hour and different percentage of POFA. The bitumen were mixed with different percentages of POFA (0, 5 and 7%) which passed through 0.075 mm sieve and grinded at different period (1 and 4 hour). The samples were then tested and compared to conventional bitumen. From TEM results, POFA grinded at 1 hour have sizes between 3-7 µm while POFA grinded for 4 hours have finer sizes between 500 nm to 3 µm. The results showed that fineness of POFA affect properties of bitumen significantly. Modified bitumen becomes harder than conventional bitumen thus decreasing in penetration value and increasing in softening point temperature. Modified bitumen gives best results when added with 7% POFA sizes of 500 nm to 3 µm compared to 3 to 7 µm.