@article {165337,
	title = {The Influence of Nano Silica Surface Area On Its Reactivity in Cement Composites},
	journal = {International Journal of Scientific \& Engineering Research},
	volume = {8},
	year = {2017},
	pages = {2016-2024},
	author = {Passant  Youssef and M.S. El-Feky and Serag, Mohamed I}
}
