Combined Influence of Metakaolin and Palm Oil Fuel Ash on the Heat of Hydration and Permeability of High Performance Concrete. - Mansour, Mohammed A.; Ismail, Mohd Hanif; Wan Ibrahim, Mohd Haziman; Mokhtar, Norfaniza; Alshalif, Abdullah Faisal (International Journal of Integrated Engineering (IJIE), 2025)