Engineering Properties of 1200 kg/m³ Lightweight Foamed Concrete with Egg Shell Powder as Partial Replacement Material of CementHock Yong Tiong, Siong Kang Lim, Yee Ling Lee and Jee Hock LimE3S Web Conf., 65 (2018) 02010DOI: https://doi.org/10.1051/e3sconf/20186502010