Computers and Concrete

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Micro-concrete composites for strengthening of RC frame made of recycled aggregate concrete

  • Marthong, Comingstarful (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Pyrbot, Risukka N. (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Tron, Stevenly L. (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Mawroh, Lam-I D. (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Choudhury, Md. Sakil A. (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Bharti, Ganesh S. (Department of Civil Engineering, National Institute of Technology Meghalaya)
  • Received : 2018.02.16
  • Accepted : 2018.11.16
  • Published : 2018.11.25
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Abstract

In this paper, to access the suitability of recycled aggregate for structural applications, concrete strength i.e., compressive, tensile and flexural strength were evaluated and compared with those specimens made of natural aggregates. Test results indicated that 30 to 42% of the mentioned strength decreases. To study the performance of frame structures made of recycled aggregate concrete (RAC) two reinforced RAC frames were prepared and tested under monotonic loading. The joint regions of one of the RAC frame were casted with micro-concrete. A reference specimen was also prepared using natural aggregate concrete (NAC) and subjected to a similar loading condition. The RAC frame resulted in a brittle mode of failure as compared to NAC frame. However, the presence of a micro-concrete at the joint region of an RAC frame improved the damage tolerance and load resisting capacity. Seismic parameter such as energy dissipation, ductility and stiffness also improves. Conclusively, strengthening of joint region using micro-concrete is found to have a significant contribution in improving the seismic performance of an RAC frame.

Keywords

References

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