Suitability of Coconut Shell Concrete for Precast Cool Wall Panel-A Review Shahiron Shahidan, Alif Syazani Leman, Mohamad Syamir Senin and Nurul Izzati Raihan Ramzi Hannan MATEC Web Conf., 87 (2017) 01005 Published online: 12 December 2016 DOI: 10.1051/matecconf/20178701005