Advances in concrete construction

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Influence of additives on leachate treatment with recycled coarse aggregate

  • T. Anstey Vathani (Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology) ;
  • J. Logeshwari (Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology)
  • Received : 2024.01.18
  • Accepted : 2024.04.24
  • Published : 2024.08.25
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Abstract

Waste of all kinds, including hazardous and non-hazardous waste, biodegradable and non-biodegradable waste, is disposed of in landfills. The separation of leachate and the use of covers to protect the ground from pollution are two of the most crucial factors that must be taken into account in a landfill. An adsorbent property is being investigated for recycled coarse aggregate (RCA), a byproduct of construction and demolition waste (C&D). Two different studies are conducted with various chemicals to determine the suitable adsorbent for RCA as filtrate material. The first study was conducted with 6 different chemicals which was observed for 20 days and the second was done for 45 days with the aid of adsorbents such sodium chloride, zeolite, and activated carbon at 3 g, 5 g and 7 g each which was shortlisted from the first study. Paper pulp, adsorbents, unfiltered leachate, and an RCA sample with a size range of 6 mm were used in a pilot experiment. It was observed that adding RCA to the mix enhanced its performance. The study's conclusions show that sodium chloride, zeolite, and activated carbon have all steadily improved over time. However, the sample's pH has moved from an acidic range to a basic range, and its color and turbidity show less responsiveness. Even if the color and turbidity show less responsiveness, this was detected to ascertain whether there have been any changes in the color or turbidity of the sample that has been taken, more investigation will be done in the future.

Keywords

References

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