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Compressive strength and ductility of short concrete columns reinforced by bamboo

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Author(s): Satjapan Leelatanon | Suthon Srivaro | Nirundorn Matan

Journal: Songklanakarin Journal of Science and Technology
ISSN 0125-3395

Volume: 32;
Issue: 4;
Start page: 419;
Date: 2010;
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Keywords: concrete column | bamboo | compressive strength | ductility

ABSTRACT
The paper presents the structural and environmentally sustainable aspects of bamboo as a reinforcing material insteadof steel reinforcement in concrete columns. Seven small-scale short columns (125 mm x 125 mm x 600 mm) with different typeof reinforcements were tested under concentric loading to investigate strength capacity and ductility. The results showedthat the strength capacity of short columns reinforced by bamboo without surface treatment could resist the axial load asstructurally required by ACI318-05, but ductility was rather low especially the column that was reinforced by 1.6 percent ofreinforcing bamboo which showed brittle behavior similar to that of plain concrete column. This was thought to be an effectof water absorption and a loss of bonding strength between concrete and bamboo. On the other hand, columns reinforcedby bamboo treated with water-repellent substance, Sikadur-31CFN, showed higher strength and ductility than columnsreinforced by untreated bamboo. The result also showed that 1.6 % of steel reinforcement, in relation to the column crosssection,could be replaced by 3.2% of treated reinforcing bamboo, for similar behavior, strength and ductility.
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