Evaluate the use of nanoparticles in concrete pavements containing fly ash

Ali Reza Sarkar¹ Morteza Tolouei²

1) Assistant Professor, Islamic Azad University, Science and Research, Tehran Branch
2) MSC ,Road and Transportation, Islamic Azad University, Science and Research, Tehran Branch

Publication : 3rd international conference of Science and Engineering(3icesconf.com)
Abstract :
The use of fly ash as partial replacement of cement in concrete has been common practice for decades. Chemically, fly ash has pozzolanic activity is attributed to the presence of SiO2 and Al2O3. This paper reports the results of an experimental study on durability of ordinary concrete and high volume fly ash (HVFA) concrete containing nano silica (NS). In this study, concretes containing 2 and 4 % of NS are prepared at a constant water/binder ratio of 0.4 for testing ages of 7and 28 days. The compressive strength and durability tests including water sorptivity investigated experimentally. Results show that besides improvement in compressive strength, the addition of 2 % NS significantly reduced the water sorptivity HVFA concretes. It is also revealed that the above durability properties of concretes containing 38 % class F fly ash and 2 % NS as partial replacement of cement are superior than ordinary concrete containing 100 % cement.
Keywords : Nano compressive strength durability concrete pavement Fly ash