Effect of aggregate size and proportion on strength properties of palm kernel shell concrete

Alengaram, Ubagaram Johnson and Mahmud, Hilmi and Jumaat, Mohd Zamin and Shirazi, S.M. (2010) Effect of aggregate size and proportion on strength properties of palm kernel shell concrete. International Journal of the Physical Sciences, 5 (12). pp. 1848-1856. ISSN 1992-1950,

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Abstract

This paper presents information on the physical and mechanical properties of different sizes of palm kernel shells (PKS) used here as lightweight aggregates (LWA) and their influence on mechanical properties of palm kernel shell concrete (PKSC). Silica fume and fly ash were used as cementitious materials and all mixes had 1 superplasticizer on cement weight. It has been found that PKS consists of about 65 to 70 of medium size particles in the range of 5 to 10 mm. The other two sizes, namely, small (0-5 mm) and large (10-15 mm) sizes were found to influence the mechanical properties of PKSC. The 28-day compressive strengths were found in the range of 21 to 26 MPa. The concrete mix that was made with medium size PKS only produced lower compressive strength of about 11 compared to the mix that contained all sizes of PKS. However, the exclusion of medium size particles didn't cause any segregation in the gap-graded aggregate concrete. The strength of PKS and bond governed the failure of PKSC. The flexural and splitting tensile strengths were found respectively 12 and 7 of the compressive strength. PKSC with about 70 of PKS of large size produced the highest modulus of elasticity of about 11 GPa.

Item Type: Article
Funders: UNSPECIFIED
Additional Information: 713JW Times Cited:3 Cited References Count:26
Uncontrolled Keywords: Palm kernel shells, fly ash, silica fume, mechanical properties, ops.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 09 May 2013 03:36
Last Modified: 05 Feb 2020 04:29
URI: http://eprints.um.edu.my/id/eprint/6067

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