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Influence of Rice Husks Ashes on Air-Drie dearth Bricks Characteristics

Author Affiliations

  • 1High National School of Engineers, University of Lome, 01 BP 1515, Lome 01, Togo
  • 2High National School of Engineers, University of Lome, 01 BP 1515, Lome 01, Togo
  • 3High National School of Engineers, University of Lome, 01 BP 1515, Lome 01, Togo
  • 4High National School of Engineers, University of Lome, 01 BP 1515, Lome 01, Togo

Res. J. Recent Sci., Volume 9, Issue (3), Pages 6-11, July,2 (2020)

Abstract

The objective of this article is to study rice husk ash (RHA) adding effect on the compressive strength, density and shrinkage of air-dried earth bricks. Two clay soils with different clay rates (one containing 60.6% clay and the other 41%) are mixed with RHA at rates ranging from 0 to 14% to make bricks. These bricks are subjected to density, shrinkage and compressive strength tests at different ages. The obtained results show that RHA increases the compressive strength and reduces the shrinkage of the bricks. This effect is optimal for a dosage of 8% RHA for bricks made with very clay soil and 4% RHA for those obtained with less clay soil. The best resistances are those of the bricks of the most clayey earth which, on the other hand, present a significant shrinkage.

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