Crack growth resistance of hybrid fiber reinforced cement composites |
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| Affiliation: | 1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China;2. College of Civil Engineering & Mechanics, Xiangtan University, Xiangtan 411105, China;3. Jiangsu Eastern Expressway Management Co., Ltd., Yancheng 224000, China;1. School of Civil Engineering, Guangzhou University, Guangzhou 510640, PR China;2. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, PR China;1. Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;2. Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Daehwa-dong, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea;1. School of Civil, Environmental and Architectural Engineering, Korea University, 1, 5-ga, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea;2. Department of Civil Engineering, Daegu University, 201, Daegudae-ro, Jillyang, Gyeong-san, Gyeong-buk 712-714, Republic of Korea |
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| Abstract: | Crack propagation in cement-based matrices carrying hybrid fiber reinforcement was studied using contoured double cantilever beam (CDCB) specimens. Influence of fiber type and combination was quantified using crack growth resistance curves. It was demonstrated that a hybrid combination of steel and polypropylene fibers enhances the resistance to both nucleation and growth of cracks, and that such fundamental fracture tests are very useful in developing high performance hybrid fiber composites. The influence of number of variables which would otherwise have remained obscured in normal tests for engineering properties become apparent in the fracture tests. The paper emphasizes the desired durability characteristics of these composites and discusses their current and future applications. |
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