1. Building Research Department, Nigerian Building and Road Research Institute (NBRRI), Ota, Ogun state, Nigeria
2. Department of Civil Engineering, Covenant University, Ota, Ogun state, Nigeria
3. Dept. of Mathematical Science, Olabisi Onabanjo University, Ago-Iwoye, Ogun state, Nigeria
4. Science Laboratory Technology Research Department, Nigerian Building and Road Research Institute (NBRRI), Ota, Ogun state, Nigeria
5. Department of Production Engineering, University of Benin, Benin-City, Nigeria