1. Fly Ash Aggregates;Bijen,1983
2. Cement-Definitions, requirements and inspection;Dutch standard NEN 3550,1979
3. Sand and gravel for reinforced concrete and for prestressed concrete. Test requirements, sampling and methods of test;Dutch standard NEN 3542,1973
4. Coarse lightweight aggregates for lightweight concrete;Dutch standard NEN 3543,1982
5. Standard test method for soundness of aggregates by use of sodium sulphate or magnesium sulphate;U.S.A. standard ASTM C88-76,1976