Table 7: Grading of natural coarse aggregate.

Size of Sieve, mm % Passing Limits of Iraqi Standard IQS No.45-1984
14 100 90-100
10 95 85-100
5 7 1-10
2.36 4 0-5
1.18 0 ----

*Grading tests were made in the material laboratory, College of Engineering,Al-Mustansiriyah University.