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Advances in Concrete Construction
  Volume 12, Number 6, December 2021 , pages 451-459
DOI: https://doi.org/10.12989/acc.2021.12.6.451
 


Mechanical behavior and chloride resistance of cementitious composites with PE and steel fiber
Qiao Liao, Zhen-wen Guo, Xin-zhi Duan, Jiang-tao Yu, Ke-ke Liu and Fang-yuan Dong

 
Abstract
    The mechanical behaviors and chloride resistance performance of fiber reinforced cementitious composites (FRCC) with hybrid polyethylene (PE) and steel fiber (in total 2% by volume) were investigated. Based on micro-mechanics and fracture mechanics, the reason why the tensile strain capacity of FRCC changed obviously was obtained. Besides, the effects of the total surface area of fiber in FRCC on compressive strength and chloride content were clarified. It is found that the improvement of the tensile strain capacity of FRCC with hybrid fiber is attributed to the growth of strain-hardening performance index (the ratio of complementary energy to crack tip toughness). As the total surface area of fiber related with the interfacial transition zone (ITZ) between fiber and matrix increases, compressive strength decreases obviously. Since the total surface area of fiber is small, the chloride resistance performance of FRCC with hybrid PE and steel fiber is better than that of FRCC containing only PE fiber.
 
Key Words
    chloride resistance performance; fiber reinforced cementitious composites (FRCC); hybrid fiber; mechanical properties
 
Address
Qiao Liao: College of Civil Engineering, Tongji University, Shanghai 200092, China
Zhen-wen Guo: Shanghai Municipal Planning and Design Institute Co., Ltd., Shanghai 200031, China; Shanghai Engineering Research Center of Urban Road Ecological Technology, Shanghai 200031, China
Xin-zhi Duan: Shanghai Municipal Planning and Design Institute Co., Ltd., Shanghai 200031, China; Shanghai Engineering Research Center of Urban Road Ecological Technology, Shanghai 200031, China
Jiang-tao Yu: College of Civil Engineering, Tongji University, Shanghai 200092, China
Ke-ke Liu: Shanghai Municipal Planning and Design Institute Co., Ltd., Shanghai 200031, China
Fang-yuan Dong: Shanghai Municipal Planning and Design Institute Co., Ltd., Shanghai 200031, China
 
References
    -acc1206001-
 

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