HYBRID ULTRA-HIGH PERFORMANCE FIBER REINFORCED CEMENTITIOUS COMPOSITES USING THE TWIST　AND STRAIGHT TYPE STEEL FIBER AND METHOD FOR IT

摘要

The present invention relates to an ultra-high performance concrete incorporating a hybrid fiber , when more detailed description torsion section long fiber is mixed to improve the mechanical properties of the concrete in the shape of the torsion gihae section , the cracking of the whole macro, and controls the ultra-high performance concrete by one to control the micro- crack by blending and mixing as well as the staple fibers of circular cross-section relates to the mechanical performance can be improved using a hybrid ultra high performance fiber reinforced concrete steel fiber compositions and methods for their preparation . ;