Advances in concrete construction

  • 제8권4호
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  • Pages.305-309
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  • 2019
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
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Porous concrete with optimum fine aggregate and fibre for improved strength

  • Karanth, Savithri S. (Department of Civil Engineering, Global Academy of Technology) ;
  • Kumar, U. Lohith (Department of Civil Engineering, Global Academy of Technology) ;
  • Danigond, Naveen (Department of Civil Engineering, Global Academy of Technology)
  • 투고 : 2019.07.15
  • 심사 : 2019.10.11
  • 발행 : 2019.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Pervious concrete pavements are the need of the day to avoid urban flooding and to facilitate ground water recharge. However, the strength of pervious or porous concrete is considerably less compared to conventional concrete. In this experimental investigation, an effort is made to improve the strength of pervious concrete by adopting fibres and a small amount of fine aggregate. A porous concrete with cement to aggregate ratio of 1:5 and a water-powder ratio of 0.4 is adopted. 30% of the cement is replaced by cementitious material ground granulated blast furnace slag (GGBS) for better strength and workability. Recron fibres at a dosage of 0.5, 1.0 and 1.5% by weight of cement were included to improve the impact strength. Since concrete pavements are subjected to impact loads, the impact strength was also calculated by "Drop ball method" in addition to compressive strength. The effect of fine aggregate and recron fibres on workability, porosity, compressive and impact strength was studied. The investigations have shown that 20% inclusion of fine aggregate and 1.5% recron fibres by weight of cement give better strength with an acceptable range of porosity.

키워드

참고문헌

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피인용 문헌

  1. Optimizing the mix design of pervious concrete based on properties and unit cost vol.11, pp.4, 2021, https://doi.org/10.12989/acc.2021.11.4.285
  2. Sound-absorption and NOx-removal performances of TiO2-incorporated porous concrete made with bottom ash aggregates vol.12, pp.1, 2019, https://doi.org/10.12989/acc.2021.12.1.001