A Review on the Manufacturing of Lightweight Aggregates Using Industrial By-ProductAiman Mahmad Nor, Zarina Yahya, Mohd Mustafa Al Bakri Abdullah, Rafiza Abdul Razak, Januarti Jaya Ekaputri, M. A. Faris and Hazamaah Nur HamzahMATEC Web Conf., 78 (2016) 01067DOI: https://doi.org/10.1051/matecconf/20167801067