Evaluation of High Strength Self-Compacting Cementitious Composite Made with Different Types of Steel Fiber
Nguyen Viet Duc† & Minh DH‡,††*
†Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam
‡Division of Construction Computation, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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This paper presents mechanical and impact properties of steel fiber-reinforced self-compacting cementitious composite (SFRSCCC) made with straight and hooked-end fibers. Each of these fibers with the content of 30kg was used for SFRSCCC. The mechanical properties were evaluated by compression, flexural and splitting tensile tests, as well as abrasion resistance test, in accordance with the corresponding standards. Yet, the drop-weight impact loading test was used for determination of impact properties. The experimental results showed that compressive strength of SFRSCCC with straight fibers was slightly higher than that with hooked-end fibers, though both of them achieved high strength class of 60MPa. While, flexural and splitting tensile strength of SFRSCCC with hooked-end fibers were 19% and 17% respectively higher than that of the one with straight fibers. In addition, abrasion resistance of SFRSCCC with straight and hooked-end fibers was almost identical. The slab specimens of SFRSCCC with the fibers only failed after three drops of mass 33kg, this means that these materials are much tougher than the composite without fiber inclusion. Also, the maximum loading capacity of the slab specimens made of SFRSCCC with hooked-end fibers is 14% higher than that of the one with straight fibers.