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Flexural strength of timber-lightweight concrete composite beam

Yeoh, David and Koh , Heng Boon and Zamzuri, Fazaliana (2005) Flexural strength of timber-lightweight concrete composite beam. In: Brunei international Conference on Engineering and Technology 20Q5 (BICET 2005), 15-17 August 2005, Brunei.

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The purpose of this paper is to investigate the flexural strength performance of timber-lightweight concrete composite beam. The study involves the determination of maximum load by experimental test, modes of failure of the beam and factors influencing the strength of beam. The species of timber that were used are Kempas (Koompassia Malaccensis) and Kapur (Dryobalanops spp) while the type of lightweight concrete applied is foamed concrete of a certain targeted density. Three types of beam section configuration were produced where each of them was designed with different position of timber at the beam. The flexural test is done by using mid-point loading method based on ASTM C78 and the modes of failure of the beam are observed. Comparison between the maximum load of lightweight concrete beam being the control beam and timber-lightweight concrete composite beam are made. The test results indicated that the control beam yielded a maximum load of 11.55 kN, and compared to the Kempas -lightweight concrete composite beam 1 and Kapur -lightweight concrete composite beam 1, it is found that these two composite beams contributed a 49.74 % and 32.57 % strength increment respectively. By comparison also, Kempas -lightweight concrete composite beam 2 achieved 74.34 % strength increment and 69.27 % for Kapur -lightweight concrete composite beam 2. Meanwhile, Kempas -lightweight concrete and Kapur - lightweight concrete composite beam 3 achieved 85.54 % dan 85.42 % strength increment from the control beam. From the results, it is found that each composite section is unique in that the timber acting as a permanent form contributed to the overall strength of the beam in varying percentage and played a different function (ie. restraining tensile, shear or compressive force) in the beam reaction. Theoretical calculations were established based on first principles, but nevertheless it is inconclusive and requires further studies.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: flexural strength; timber-lightweight concrete composite beam; Kempas; Kapur; foamed concrete
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA630-695 Structural engineering (General)
Divisions: Faculty of Civil and Environmental Engineering > Department of Structural and Material Engineering
Depositing User: Prof. Madya Dr David Yeoh Eng Chuan
Date Deposited: 24 Jul 2014 01:25
Last Modified: 12 Sep 2018 08:18
URI: http://eprints.uthm.edu.my/id/eprint/5732
Statistic Details: View Download Statistic

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