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Effects of Periwinkle Shell Ash on Lime-Stabilized Lateritic Soil
NNOCHIRI, EMEKA SEGUN
Abstract
This study assesses the effects of periwinkle shell ash (PSA) on lime-stabilized lateritic soil.
Preliminary tests were carried out on the natural soil sample for the purposes of identification and classification. The
soil sample was classified as A-7-5. Thereafter, the soil sample was mixed with lime at percentages of 2, 4, 6, 8 and
10. These were later subjected to atterberg limit tests to get the optimum amount of lime, which was 10% because the
least value of plasticity index was recorded at this state. PSA was added to the lime-treated soil sample at varying
proportions of 2, 4, 6, 8 and 10%. The mixes were subjected to compaction, California bearing ratio (CBR), atterberg
limits and unconfined compressive strength (UCS) tests, in so doing, the values of the CBR and UCS increased
considerably. It can be concluded that the PSA performs satisfactorily as a cheap complement for lime in soil
stabilization.
Keywords
atterberg limits; lateritic soil; lime stabilization; periwinkle shell ash; soil stabilization
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