Mostafaa N. Y., El-Hemalyb S. A. S., Al-Wakeelc E. I., El- Korashyc S. A., Browna
P. W., 2001, Characterization and Evaluation of the Pozzolanic Activity of Egyptian
Industrial By-Products: I: Silica Fume and Dealuminated Kaolin, Cement and Concrete
Research, Vol. 31, No. 3, pp. 467-474