شماره ركورد كنفرانس :
4561
عنوان مقاله :
Effect of thermal cycle on the fracture properties of epoxy polymer concrete
Author/Authors :
M Heidari-Rarani Faculty of Engineering - University of Isfahan, Isfahan , M.R.M Aliha Fatigue and Fracture Laboratory - Center of Excellence in Experimental Solid Mechanics and Dynamics - School of Mechanical Engineering - Iran University of Science and Technology, Tehran , M.M Shokrieh Composites Research Laboratory - Department of Mechanical Engineering - Center of Excellence in Solid Mechanics and Dynamics - Iran University of Science & Technology, Tehran , M.R Ayatollahi Fatigue and Fracture Laboratory - Center of Excellence in Experimental Solid Mechanics and Dynamics - School of Mechanical Engineering - Iran University of Science and Technology, Tehran
كليدواژه :
epoxy resin polymer concrete , thermal cycle , fracture toughness , experimental study
عنوان كنفرانس :
The Bi-Annual International Conference on Experimental Solid Mechanics and Dynamics ۲۰۱۴
چكيده لاتين :
Fracture properties of polymer concretes (PCs) are important parameters in engineering design due to quasi-brittle behavior of such materials. Polymer part plays the key role on the physical and mechanical properties of PC materials due to high sensitivity to temperature. In this research, the durability and crack growth resistance of an epoxy polymer concrete is investigated experimentally under two freez/thaw thermal cycles (i) a heat to cool thermal cycle ranging from 25°C to -30°C and (ii) a cool to heat thermal cycle ranging from -30°C to 70°C. Rectangular beam specimens containing edge cracks and subjected to symmetric three-point bend loading was used for obtaining the mode I fracture toughness (KIc). The fracture toughness results revealed the significant influence of thermal cycles on the fracture behavior of polymer concrete materials. It was observed that heat to cool thermal cycle increases mode I fracture toughness of tested polymer concrete relative to the test results at ambient conditions. Conversely a noticeable reduction in KIc value was observed under cool to heat cycles applied to the polymer concrete test samples.
