Study on properties of rice husk ash and its use as cement replacement material
AUTOR(ES)
Habeeb, Ghassan Abood, Mahmud, Hilmi Bin
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2010-06
RESUMO
This paper investigates the properties of rice husk ash (RHA) produced by using a ferro-cement furnace. The effect of grinding on the particle size and the surface area was first investigated, then the XRD analysis was conducted to verify the presence of amorphous silica in the ash. Furthermore, the effect of RHA average particle size and percentage on concrete workability, fresh density, superplasticizer (SP) content and the compressive strength were also investigated. Although grinding RHA would reduce its average particle size (APS), it was not the main factor controlling the surface area and it is thus resulted from RHA's multilayered, angular and microporous surface. Incorporation of RHA in concrete increased water demand. RHA concrete gave excellent improvement in strength for 10% replacement (30.8% increment compared to the control mix), and up to 20% of cement could be valuably replaced with RHA without adversely affecting the strength. Increasing RHA fineness enhanced the strength of blended concrete compared to coarser RHA and control OPC mixtures.
Documentos Relacionados
- Study of peanut husk ashes properties to promote its use as supplementary material in cement mortars
- Mechanical Behavior of Concrete Modified by Replacement of Cement by Rice Husk Ash
- Properties of silica from rice husk and rice husk ash and their utilization for zeolite y synthesis
- Rice Husk Ash as Raw Material for the Synthesis of Silicon and Potassium Slow-Release Fertilizer
- Replacement of Commercial Silica by Rice Husk Ash in Epoxy Composites: A Comparative Analysis