건설재료시공학연구실

Building material & construction lab.

In order to systematically examine the explosive spalling of high strength concrete, it was used small size specimen to evaluate explosive spalling property and temperature history according to ISO-834 fire curve. Also, optimizing condition of mixed fiber was confirmed by calculating the weight loss of fiber based on heat transfer analysis of inner concrete. Based on melting point of fiber, we used three fiber types [which were polyethylene (110 °C), polypropylene (165 °C), nylon fiber (225°C)]. Mixed fiber as 0.15, 0.25 % of concrete volume, test on spalling properties, TG-DTA of fiber and FEM analysis were performed.