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Development of eco-friendly concrete produced with Rice Husk Ash (RHA) based geopolymer

  • Annadurai, Shalini (Department of Civil Engineering, Sona College of Technology) ;
  • Rathinam, Kumutha (Department of Civil Engineering, Sri Venkateswara College of Engineering) ;
  • Kanagarajan, Vijai (Department of Civil Engineering, St. Joseph's College of Engineering)
  • Received : 2019.08.11
  • Accepted : 2019.11.27
  • Published : 2020.02.25
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Abstract

This paper reports the effect of Rice Husk Ash (RHA) in geopolymer concrete on strength, durability and microstructural properties under ambient curing at a room temperature of 25℃ and 65±5% relative humidity. Rice husk was incinerated at 800℃ in a hot air oven. and ground in a ball mill to achieve the required fineness. RHA was partially added in 10, 15, 20, 25, 30 and 35 percentages to fly ash with 10% of GGBS to produce geopolymer concrete. Test results exhibit that the substitution of RHA in geopolymer concrete resulted in reduced strength properties during initial curing. In the initial stage, workability of GPC mixes was affected by RHA particles due to the presence of dormant particles in it. It is evident from the microstructural study that the presence of RHA particles densifies the matrix reducing porosity in concrete. This is due to the presence of RHA in geopolymer concrete, which affects the ratio of silica and alumina, resulting in polycondensation reactions products. This study suggests that incorporation of rice husk ash in geopolymer concrete is the solution for effective utilization of waste materials and prevention of environmental pollution due to the dumping of industrial waste and to produce eco-friendly concrete.

Keywords

References

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