DOI QR코드

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Strength and behaviour of recycled aggregate geopolymer concrete beams

  • Deepa, Raj S (Department of Civil Engineering, College of Engineering Trivandrum) ;
  • Jithin, Bhoopesh (Department of Civil Engineering, College of Engineering Trivandrum)
  • 투고 : 2017.01.16
  • 심사 : 2017.04.18
  • 발행 : 2017.04.25

초록

In the present day scenario, concrete construction is rapidly becoming uneconomical and non sustainable practice, due to the scarcity of raw materials and environmental pollution caused by the manufacturing of cement. In this study an attempt has been made to propose recycled aggregates from demolition wastes as coarse aggregate in geopolymer concrete (GPC). Experimental investigations have been conducted to find optimum percentage of recycled aggregates (RA) in GPC by replacing 20%, 30%, 40%, 50% and 60% of coarse aggregates by RA to produce recycled aggregate geopolymer concrete (RGPC). From the study it has been found that the optimum replacement percentage of recycled aggregates was 40% based on mechanical properties and workability. In order to study and compare the flexural behaviour of RGPC and GPC four beams of size $175mm{\times}150mm{\times}1200mm$ were prepared and tested under two point loading. Test results were evaluated with respect to first crack load, ultimate load, load-deflection characteristics, ductility and energy absorption characteristics. Form the experimental study it can be concluded that the addition of recycled aggregate in GPC causes slight reduction in its strength and ductility. Since the percentage reduction in strength and behaviour of RGPC is meager compared to GPC it can be recommended as a sustainable and environment friendly construction material.

키워드

과제정보

연구 과제 주관 기관 : College of Engineering Trivandrum

참고문헌

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피인용 문헌

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  4. Behaviour of Structural Elements made of Geopolymer Concrete with Recycled Aggregates vol.1091, pp.1, 2021, https://doi.org/10.1088/1757-899x/1091/1/012030
  5. Shear behaviour of RC beams made with natural, recycled aggregate concrete and reclaimed asphalt aggregates under normal and elevated temperature vol.40, pp.None, 2017, https://doi.org/10.1016/j.jobe.2021.102681
  6. Flexural behavior of reinforced geopolymer concrete beams with recycled coarse aggregates vol.24, pp.14, 2017, https://doi.org/10.1177/13694332211026224