Investigating the Performance of Palm Kernel Shells and Periwinkle Shells as Coarse Aggregates in Concrete
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Date
2020
Authors
Oladiran O.J.
Simeon D.R.
Olatunde O.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Ladoke Akintola University of Technology
Abstract
Excessive usage of materials is causing fast depletion of natural stone deposit. This study therefore
investigates the performance of palm kernel shells (PKS) and periwinkle shells (PS) as alternatives
coarse aggregates in concrete. Forty cubes and 40 cylinders each were produced with PKS and PS
as replacement materials for granite. Series of tests were conducted to determine their
performances. The results showed that, compressive and tensile strengths decrease as PKS and PS
content increases, which allow specific area to increase, thus requiring more cement paste to bond
effectively with the shells. The result also revealed that for all curing ages, palm kernel shell
concrete (PKSC) have lower compressive strength and tensile strength than periwinkle shell
concrete (PSC). The compressive strength and tensile strength of the 28-day PKSC with 100%
replacement were 4.33 N/mm2
and 3.68 N/mm2
respectively; that of PSC at 100% replacement were
5.89 N/mm2
and 4.95 N/mm2
respectively; and granite concrete without any replacement were 25.11
N/mm2
and 11.74 N/mm2 respectively. It is concluded that both PKSC and PSC satisfied the
compressive strength and tensile strength requirement of light weight concrete, although PS has
better gradation and bonding to cement than PKS. This implies that PS is best suited as replacement
for granite in lightweight concrete than PKS. It is recommended that the mix-ratio should be altered
to get higher values of compressive strength; and both PKS and PS should be used for lightweight
concretes.
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Citation
Oladiran, O.J., Simeon, D.R. & Olatunde, O.A. (2020). Investigating the performance of palm kernel shells and periwinkle shells as coarse aggregates in concrete. LAUTECH Journal of Civil and Environmental Studies, 4(1), 123 – 133.