Advances in concrete construction

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Effect of different binders on cold-bonded artificial lightweight aggregate properties

  • Vali, Kolimi Shaiksha (Department of Structural and Geotechnical Engineering, School of Civil Engineering, Vellore Institute of Technology) ;
  • Murugan, S. Bala (Department of Structural and Geotechnical Engineering, School of Civil Engineering, Vellore Institute of Technology)
  • Received : 2018.10.14
  • Accepted : 2019.12.27
  • Published : 2020.02.25
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Abstract

The present investigation is to identify an optimum mix combination amongst 28 different types of artificial lightweight aggregates by pelletization method with aggregate properties. Artificial aggregates with different combinations were manufactured from fly ash, cement, hydrated lime, ground granulated blast furnace slag (GGBFS), silica fume, metakaolin, sodium bentonite and calcium bentonite, at a standard 17 minutes pelletization time, with 28% of water content on a weight basis. Further, the artificial aggregates were air-dried for 24 hours, followed by hardening through the cold-bonding (water curing) process for 28 days and then testing with different physical and mechanical properties. The results found the lowest impact strength value of 16.5% with a cement-hydrated lime (FCH) mix combination. Moreover, the lowest water absorption of 16.5% and highest individual pellet crushing strength of 36.7 MPa for 12 mm aggregate with a hydrated lime-GGBFS (FHG) mix combination. The results, attained from different binder materials, could be helpful for manufacturing high strength artificial aggregates.

Keywords

References

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