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Advances in Concrete Construction
  Volume 9, Number 2, February 2020 , pages 139-147

Development of eco-friendly concrete produced with Rice Husk Ash (RHA) based geopolymer
Shalini Annadurai, Kumutha Rathinam and Vijai Kanagarajan

    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 25oC and 65+-5% relative humidity. Rice husk was incinerated at 800oC 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.
Key Words
    rice husk ash; microstructure; bond strength; strength; curing; carbonation
Shalini Annadurai: Department of Civil Engineering, Sona College of Technology, Salem-636005, Tamil Nadu, India
Kumutha Rathinam: Department of Civil Engineering, Sri Venkateswara College of Engineering, Sriperumbudur-602117, Tamil Nadu, India
Vijai Kanagarajan: Department of Civil Engineering, St. Joseph\'s College of Engineering, OMR, Chennai-600119, Tamil Nadu, India

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