Modeling and design optimization of reclaimed asphalt pavement containing crude palm oil using response surface methodology

Rafiq, W. and Napiah, M. and Habib, N.Z. and Sutanto, M.H. and Alaloul, W.S. and Khan, M.I. and Musarat, M.A. and Memon, A.M. (2021) Modeling and design optimization of reclaimed asphalt pavement containing crude palm oil using response surface methodology. Construction and Building Materials, 291 .

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This study discusses the influence of using crude palm oil in hot mix asphalt incorporating recycled asphalt pavement materials. The effect of different percentages of recycled asphalt pavement (RAP) and crude palm oil (CPO) on stability, flow, stiffness, voids in mix (VIM), voids filled with asphalt (VFA), and Indirect Tensile Strength (IDT) were assessed. In addition, for the statistical analysis an analytical tool response surface methodology (RSM) was used for designing and statistically analyzing the experimental results. A microstructure level investigation on the virgin binder (60/70) and RAP binder incorporating crude palm oil was performed using atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR) analysis. Experimental results showed that stability and indirect tensile strength increases with an increase in recycled asphalt pavement material up till 80. However, 100 RAP with crude palm oil resulted in reduction in these strength parameters. The microstructural analysis shows that the incorporation of CPO in virgin and RAP aged binder change the structure of aged and virgin binder by new and unique phase formations. The statistical models were found significant and well fitted on bases of R2 value (>0.80), high adequate precision value (>4), low p-value and insignificant lack-of-fit. Furthermore, ANOVA model theoretical results by the RSM analysis were validated by experiments with <5 of error that represent a good agreement between experimental and theoretical results. Crude palm oil inclusion in HMA-RAP showed good improvement in performance parameters indicating a potential source of rejuvenating agent as bio binder material for the pavement construction industry. © 2021 Elsevier Ltd

Item Type:Article
Impact Factor:cited By 1
Uncontrolled Keywords:Analysis of variance (ANOVA); Asphalt; Asphalt pavements; Atomic force microscopy; Binders; Construction industry; Convergence of numerical methods; Palm oil; Recycling; Surface properties; Tensile strength, Atomic-force-microscopy; Crude palm oil; Flow; Fourier transform infra reds; Indirect tensile strength; Model optimization; Pavement material; Recycled asphalt pavement; Response-surface methodology; Transform infrared spectroscopy, Fourier transform infrared spectroscopy
ID Code:23815
Deposited By: Ms Sharifah Fahimah Saiyed Yeop
Deposited On:19 Aug 2021 13:09
Last Modified:19 Aug 2021 13:09

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