Title of article :
The effect of adding nano-silica on the ultrasonic pulse velocity of geopolymer concrete
Author/Authors :
Mehdikhani, Behzad Construction and Mineral Department - Standard Research Institute - Technical and Engineering Faculty, Karaj, Iran , Saeedi Razavi, Behzad Construction and Mineral Department - Standard Research Institute - Technical and Engineering Faculty, Karaj, Iran , Ahmadi, Jamal Department of Civil - Faculty of Engineering - University of Zanjan, Zanjan, Iran , Goharrokhi, Ali Applied Science Center of Khorasan Razavi Municipalities, Mashhad, Iran
Abstract :
Nanotechnology plays an important role in the current construction industry. It has
been observed that several properties of cement-based concrete are affected by different
nano materials. In this study, different weight percentages of nano-silica (0, 1, 2, and
4 wt%) were used to build geopolymer specimens. The mechanical properties of the
specimens were then measured, including the compressive and flexural strength. Results
demonstrated that increasing the percentage of nano-silica from 0 to 4 wt% increases the
compressive strength of the specimens from 50.4 to 75.2 MPa and the flexural strength
from 11.4 to 26.2 MPa. Furthermore, it was observed that the ultrasonic pulse velocity
was altered by increasing SiO2 (nano-silica), decreasing the ultrasonic pulse rate from
7.0 to 4.5 km.s-1.
Keywords :
Geopolymer concrete , Nano-silica , Compressive and flexural strength , Ultrasonic pulse velocity
Journal title :
Journal of Particle Science and Technology
