Comparative Effect of Bio-waste Ashes on Strength Properties of Cement Mortar

DOI Web Site 参考文献36件
  • AJAY Goyal
    Department of Environmental Engineering, United Graduate School of Agricultural Sciences, Tottori University
  • HATTORI Kunio
    Faculty of Agriculture, Tottori University
  • OGATA Hidehiko
    Faculty of Agriculture, Tottori University
  • ASHRAF Muhammad
    Department of Environmental Engineering, United Graduate School of Agricultural Sciences, Tottori University
  • AHMED Mohamed Anwar
    Department of Environmental Engineering, United Graduate School of Agricultural Sciences, Tottori University

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Biomass fuels produce about 400 million tonnes of ashes as waste material. This paper discusses the pozzolanic character of bio-waste ashes obtained from dry tree leaves (AML), Korai grass (KRI) and Tifton grass (TFT). Ashes were obtained by control incineration of the wastes at 600°C for 5 hours and mortar specimens were prepared by substituting cement with 10, 20 and 30% ash. Strength development of ash-blended mortar specimens was evaluated by conducting destructive tests as well as non-destructive tests till 91 days. X-ray diffraction, scanning electron microscopic and thermo-gravimetric techniques were used to analyze the influence of ash substitution on strength properties of blended-mortar. Pozzolanic reactivity of AML- and KRI-ash was confirmed, but TFT-ash did not show enough reactivity. Overall results confirmed that up to 20% substitution of cement can be made with AML- or KRI-ash with strength approaching 90% of that of control.

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