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Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS)


Article Title: Mechanical Properties of Guarea Thompsonii Sawdust Modified Concrete
by O. U. Orie and P. Osamede

Timber waste has continued to be generated in large quantities contributing to environmental depletion. The work investigated the feasibility of the use of sawdust from Guarea Thompsonii as an admixture in concrete. It finds its importance in showing the effect of using sawdust of a hard wood of known properties, on some mechanical properties of concrete. It applied the laboratory investigative technique. The content of the sawdust in a standard 1:2:4:0.55 concrete mix representing; cement; fine aggregate, coarse aggregate and water respectively was varied in the order; 0%, 2%, 4%, 6% 8% and 10%. Guarea Thompsonii sawdust gave a specific density of 1.29. The addition of the sawdust increased the setting time of ordinary Portland cement from 4.33hrs to 5.07hrs for 2%, 6.00hrs for 4%, 6.15hrs for 6%, 7.06hrs for 8%, and 7.17hrs for 10%. It produced a decrease in the compressive strength and density of the concrete increasing its plasticity. It showed best performance of compressive strength and density at 6% addition with 28.83 N/mm2 -a decrease of 14.75% and 2.53 x 10-3kg/m3 respectively with a slump of 10mm. The work concludes that Guarea Thompsonii sawdust is an ideal filler material to produce light weight concrete which can be used for permanent form work floor panels, wall panels, paving blocks, noise barriers and load/Non-load bearing walls. The reuse of otherwise waste materials in the construction industry will no doubt contribute to efforts at conserving the Earths available energy.
Keywords: imber, waste, Admixtures, Concrete and Compressive Strength.
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ISSN: 2141-7016

Editor in Chief.

Prof. Gui Yun Tian
Professor of Sensor Technologies
School of Electrical, Electronic and Computer Engineering
University of Newcastle
United Kingdom



Copyright © Journal of Emerging Trends in Engineering and Applied Sciences 2010