معنى 42 5n الاسمنت
ما الفرق في رتبة الاسمنت للمواصفات المصرية المركز . Portland Cemnent 42,5N TS EN 197-1 CEM II / B-M (V-L) 42.5 N This Portland composite cement contains 25% fly ash, which is finely blended with limestone in its compounds as well as Portland cement.