吹き付けた鋼繊維補強モルタルの曲げ強度

概要

論文の詳細を見る
Sprayed steel-fiber reinforced mortar (SFRM) or concrete (SFRC), one of the future promising composite materials, is considered to suit todays rapid excavation by a tunnel boring machine, a boom header or a continuous miner. In this study, four-point bending tests were performed measuring load and deflection in the air-dried condition. The pre-failure characteristics such as Youngs modulus did not change so much. However, the residual strength increased dramatically in behalf of the steel-fiber reinforcement. The peak strength at steel-fiber content of 1.5 % became twice as much as that of plain mortar. The experimental results in bending together with the results of uniaxial tension and compression tests were analytically examined and discussed. It was found that the peak strength in bending was strongly correlated with the residual strength in tension. An equation to estimate the peak strength in bending was proposed and the calculated results were compared with the experimental results.
社団法人資源・素材学会の論文
1998-02-25