STUDY ON BOND MECHANISM OF STEEL FIBER REINFORCED ULTRA RAPID HARDENING CONCRETE APPLIED TO CONCRETE OVERLAY

Abstract

The purpose of this study is to investigate bond mechanism of steel fiber reinforced ultra hardening concrete. Bond strength of steel fiber reinforced ultra rapid hardening concrete is influenced by quality of foundation concrete, that is to say the higher compressive strength of foundation concrete, the higher bond strength is. And bond strength decreases with slump down of ultra rapid hardening concrete. This is related to producing time and volume of etringite. This is related to product time and volume of etringite.