1. Graduate Student, School of Construction Economics and Management, Univ. of the Witwatersrand, 1 Jan Smuts Ave., Braamfontein, Johannesburg, Gauteng 2000, South Africa (corresponding author). ORCID: .
2. Assistant Professor, Sustainable Construction Materials and Structural Systems Research Group, Dept. of Civil and Environmental Engineering, Univ. of Sharjah, Sharjah, UAE.
3. Professor, School of Construction Economics and Management, Univ. of the Witwatersrand, 1 Jan Smuts Ave., Braamfontein, Johannesburg, Gauteng 2000, South Africa.