건설재료시공학연구실

Building material & construction lab.

Abstract

In this study, we conducted an experiment to evaluate water vapor pressure of ultra high strength concrete according to ISO-834 standard fiber curve. Based on melting point of fiber, we used three fiber types(Polyethylene(110℃), Polypropylene(165℃), Nylon fiber(225℃)). Mixed fiber as 0.15, 0.25% of concrete volume, test spalling properties, water vapor pressure analysis were performed. As a result, it is difficult to prevent initial spalling if fiber weight loss is not occur even though fiber melting point is low. Also in case of ultra high strength concrete, fiber which make a porosity rapidly within 10 minutes is more effective than that of low melting point.