Computers and Concrete

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Influence of plastic viscosity of mix on Self-Compacting Concrete with river and crushed sand

  • Rama, J.S. Kalyana (Department of Civil Engineering, BITS Pilani, Hyderabad Campus) ;
  • Sivakumar, M.V.N. (Department of Civil Engineering, National Institute of Technology) ;
  • Kubair, K. Sai (Department of Civil Engineering, BITS Pilani, Hyderabad Campus) ;
  • Vasan, A. (Department of Civil Engineering, BITS Pilani, Hyderabad Campus)
  • Received : 2018.06.01
  • Accepted : 2019.01.22
  • Published : 2019.01.25
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Abstract

In view of the increasing utility of concrete as a construction material, the major challenge is to improve the quality of construction. Nowadays the common problem faced by many of the concrete plants is the shortage of river sand as fine aggregate material. This led to the utilization of locally available materials from quarries as fine aggregate. With the percentage of fines present in Crushed Rock Fines (CRF)or crushed sand is more compared to river sand, it shows a better performance in terms of fresh properties. The present study deals with the formulation of SCC mix design based on the chosen plastic viscosity of the mix and the measured plastic viscosity of cement pastes incorporating supplementary cementitious materials with CRF and river sand as a fine aggregate. Four different combinations including two binary and one ternary mix are adopted for the current study. Influence of plastic viscosity of the mix on the fresh and hardened properties are investigated for SCC mixes with varying water to cement ratios. It is observed that for an increasing plastic viscosity of the mix, slump flow, T500 and J-ring spread increased but V-funnel and L-box decreased. Compressive, split tensile and flexural strengths decreased with the increase in plastic viscosity.

Keywords

References

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