Noor Zainab Habib and  Ibrahim Kamaruddin and  Madzalan Napiah and  Isa Mohd Tan,  Effect of Mixing Process on Polypropylene Modified Bituminous Concrete Mix Properties.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2011, vol. 58(10). 477 - 482
    [viewed 15 May 2021]. Available from: https://publications.waset.org/pdf/8906.