[1] Univ West England, Sch Architecture & Environm, Bristol, England
[2] Univ Johannesburg, Ctr Sustainable Mat & Construct Technol SMaCT, Johannesburg, South Africa
[3] Univ Cape Town, Sustainabil Oriented Cyber Res Unit Built Environm, Cape Town, South Africa
[4] Univ Cape Town, Dept Construct Econ & Management, Cape Town, South Africa
[5] Univ Johannesburg, Dept Construct Management & Quant Surveying, Johannesburg, South Africa