Develop interlocking concrete block pavement from portland cement, polystyrene and bottom ash on pedestrian road by Awang, Mariah, Idris, Mohamad Luqman Hakkim, Ja’afar, Azman, Marsi, Noraini, Mohd. Fodzi, Muhammad Haikal, Musa, Kamaruzaman, Ahmad, Faridahanim, Syazwan, M. M. Syafiq, Yusop, Fatimah, Aiman Jumali, Adibah