Evaluation of Waste Cooking Oil as Sustainable Binder for Building Blocks Johnson Olufemi Adebayo, Madzlan Napiah, Kamaruddin Ibrahim and Mohamad Raduan Kabit E3S Web Conf., 65 (2018) 05003 Published online: 26 November 2018 DOI: 10.1051/e3sconf/20186505003