Title : PERFORMANCE DEGRADATION OF ULTRA HIGH STRENGTH FIBER REINFORCED CONCRETE DUE TO FIBER CORROSION
Authors : Hiroshi Yokota, Katsufumi Hashimoto, Shigeru Kamimatsuse
Publication : 7, October 2015
Volume :
Pages :
Price : 250
Abstract : Ultra high strength fiber reinforced concrete (UFC) has higher strength, ductility, and durability than ordinary concrete. When steel fiber is corroded, however, such the high performance will be degraded. This paper presents the results of experimental research to investigate tensile performance of UFC after crack occurrence under corrosive environment. Corrosion of steel fiber and chloride ion penetration into UFC having no cracks or tiny cracks did not significantly occur. Corrosion products from steel fiber are detected near the surface of UFC when it has a wider crack. Additionally, cracks due to external loads propagated more widely and chloride ions distributed along the cracks. Minor corrosion of steel fiber enhanced tensile stress carried by UFC regardless of crack widths, but significant corrosion degraded tensile performance. In conclusions, it was made clear how corrosion of steel fiber affects degradation of tensile characteristics of UFC.