Abstract
In recent years, a high toughness cement composite material (HTCCM) has been developed, which has far more performance than existing fiber reinforced concrete. HTCCM is a composite material made by reinforcing cement-based materials with fibers. It exhibits multiple crack characteristics under bending stress and greatly improves toughness during flexural, tensile, and compressive fracture. In this study, it is examined the mechanical properties of high fluidity and high toughness concrete (HFHTC) using fly ash as an admixture and recycled fine and coarse aggregate as an aggregate. From the standpoint of durability, it is necessary to fully examine the long-term properties of HFHTC using recycled fine and coarse aggregate, therefore, it is examined the strength and shrinkage of HFHTC using recycled fine and coarse aggregates.
Highlights
Many paper and research on recycled aggregate have been actively carried out in the concrete industry
It is concluded that the overall trend in strength development in R-high-fluidity ductilefiber-reinforced concrete (HFDFRC) can be broadly approximated with our equation proposed
water binder ratio (W/B)=40% is the highest value in 28 days, and it is declining at 91 days
Summary
Many paper and research on recycled aggregate have been actively carried out in the concrete industry. To promote the recycling of concrete more extensively, it is necessary to develop new technology for effectively using recycled aggregate. Research on ductile-fiber-reinforced cementitious composites (DFRCC) using recycled fine aggregate has been reported. If DFRCC with excellent workability characteristics can be developed, those problems would be solved As this material overcomes the brittle properties of general concrete, the performance and durability of concretebased structural elements are expected to be greatly improved, and various new applications such as high-performance repair materials and shock-absorbing materials are expected to replace conventional cement-based materials. To further promote recycling of concrete in the future, it is necessary to develop new effective utilization technologies for recycled aggregate. Long-term material properties (such as strength development and shrinkage behavior) of R-HFDFRC. It is concluded that the overall trend in strength development in R-HFDFRC can be broadly approximated with our equation proposed
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