TI - Modification of high-calcium fly ash to meet ASTM requirements when used as a binder AU - ABDULREHMAN, M.A. AU - ABBOD, E.A. AU - SALMAN, A.A. AU - MOFTEN, A.Q. AU - MOHAMMED, A.H. SO - Sigma Journal of Engineering and Natural Sciences 2026;44:3096-3106. DO - 10.14744/sigma.2026.2145