1. Professor, Building Materials Research and Quality Control Institute, Housing and Building National Research Center, Cairo 11511, Egypt (corresponding author).
2. Assistant Professor, Raw Building Materials Technology and Processing Research Institute, Housing and Building National Research Center, Cairo 11511, Egypt; presently, Univ. College of Taimaa, Tabuk Univ., Tabuk 71491, Kingdom of Saudi Arabia.
3. Associate Professor, Building Materials Research and Quality Control Institute, Housing and Building National Research Center, Cairo 11511, Egypt.