Study on modify shear and bending resistance of steel- polyethylene slag HyFRC

• Main Authors: Chun-Kai Juan, 阮俊凱
• Other Authors: Hsien-Hua Lee
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/89212949688694920868

碩士 === 國立中山大學 === 海洋環境及工程學系研究所 === 101 === Concrete is the most used engineer material on the world. It is a brittle material, good in compression resistance but poor in tensile and bending resistance. Hence, we put fiber into concrete to modify its mechanical properties. A newer material is hybrid fiber reinforce concrete (HyFRC), it’s still under developing now. This study use hyper performance polyethylene fiber (Dyneema) and hooked-end steel fiber, to research the mechanical properties variety of concrete by different length of dyneema in the same hybrid fiber amount added. This study plan use dyneema length 2cm, 4cm, 6cm and 3cm steel fiber, and two different concrete W/B= 0.35(Air entrained &; Water-reducing added) and W/B=0.42.there are 6 sets of HyFRC and2 sets of OPC to compare the benefit by hybrid fiber. After tests we can get the compression stress of HyFRC is 10% more than OPC, and shear stress is over 30% than OPC and also can absorb more over 100% energy before failure. If fiber too long, it will agglomerate seriously and cause bleeding and segregation, it makes poor mechanical properties. At last, the conclusion of this study is the best polyethylene fiber length is 2cm and Air entrained &; Water-reducing added.