Abstract—In this study, the effect of elevated temperatures on the compressive strength, Ultrasonic Pulse Velocity (UPV), Thermal Conductivity (TC) and density of pumice based geopolymer concretes have been investigated. Totally 27 cylindrical (10*20 cm) specimens have been manufactured from the NaOH-activated pumice based geopolymer. After 28 days curing they have been exposed to temperature of 100¡ãC, 200¡ãC, 300¡ãC, 400¡ãC, 500¡ãC, 600¡ãC, 700¡ãC, 800¡ãC for 3h in ceramic furnace. Afterwards the compressive strength, UPV, thermal conductivity and density of the specimens were determined. As a result all of the mentioned features have been deteriorated after exposing to elevated temperature than of control geopolymer concrete samples. But the produced geopolymer concrete can be fabricated for construction intents and have good potential for engineering applications.

Index Terms—Elevated temperature, Geopolymer concrete, Pumice, Thermal conductivity, UPV

Cite: Mehrzad Mohabbi Yadollahi, Ramazan Demirboga, Riza Polat, and Majid Atashafrazeh, "Behavior Investigation of NaOH Activated Pumice-Based Geopolymer Composites Exposed to Elevated Temperature," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 2, pp. 137-142, May 2013.