Call For Paper Volume:4 Issue:8 Aug'2017 |

Increasing the Reactivity of Silica Fume Particles Using Indirect Sonication: Effect of Process Parameters

Publication Date : 15/07/2015



Author(s) :

Muhammad S. El-Feky , M. M. Hashem , Mohamed I. Serag , Hala El-Kady.


Volume/Issue :
Volume 2
,
Issue 7
(07 - 2015)



Abstract :

Nowadays, Nano silica (SN) appears to be one of the most attractive cement additives. Its incorporation improves the mechanical and physical properties of concrete. The aim of the current research is to develop a new method for preparation of nano silica fume particles using indirect sonication. The effects of the process parameters on the particles size have been investigated. These parameters include sonication power, sonication frequency, homogenizer speed, sonication time, and liquid/solid ratio. The prepared samples were monitored for particle size distribution, and level of dispersion using transmission electron microscope (TEM). The effect of the prepared nano silica fume on the ultimate properties of the concrete mixtures has been determined and compared with the original silica fume. Results obtained showed that, the proposed technique yield NS particles with average size of 57 nm and about 91% from the total particles having particle size less than 100 nm. Application of NS as cement additives (substitution) enhanced the reactivity of the produced nano silica fume, as its cement substitution by 1% resulted in compressive strength equivalent to that reached with 10% of the original silica fume substitution.


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Increasing the Reactivity of Silica Fume Particles Using Indirect Sonication: Effect of Process Parameters

July 11, 2015