摘要:
A reinforcing material for incorporation into a kneaded and shaped hydraulic material, comprising a fiber having a fineness of 5 d or more, an aspect ratio of from 10-500, a breaking tenacity of 5 g/d or more, an elongation (A) of from 6-20%, a flexing tenacity utilization factor (B) of 35% or more, and (B).ltoreq.4 (A).