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High Ductile Fiber Reinforced Concrete with Micro Fibers

마이크로 섬유를 혼입한 고인성 섬유 보강 콘크리트

Shin, Kyung-Joon;Lee, Seong-Cheol;Kim, Yun-Yong
신경준;이성철;김윤용

  • Received : 2018.11.26
  • Accepted : 2019.01.03
  • Published : 2019.03.01

Abstract

In general, high strength and high performance fiber reinforced cement composites exclude coarse aggregates basically in order to have homogeneous distributions of material properties. However, these fiber-reinforced cement mortar without coarse aggregate have a tenancy that the modulus of elasticity is low and the unit weight of cement is high, resulting in low economic efficiency. Therefore, in this study, the development of high ductile fiber - reinforced concrete was conducted, which has the adequate level of coarse aggregate but still retains the high flexural toughness and strength and also has the crack - distributing performance. Experimental study was carried out by using the amount of coarse aggregate as an experimental parameter. The results showed that the best flexural toughness and crack dispersion characteristics was obtained when the coarse aggregate was added at 25% by weight of the fine aggregate to the typical mixtures of high ductile cement mortar. PVA fiber was effective in crack distribution and ductility enhancement, and steel fiber was effective in strengthening flexural strength rather than crack distribution.

Keywords

Flexural toughness;Flexural Strength;Multiple Cracks;Fiber Reinforced Concrete

Acknowledgement

Supported by : 충남대학교