Results 211 to 220 of about 705,997 (241)

The suitability of periwinkle shells as coarse aggregate for structural concrete

Matériaux et Constructions, 1974
The results of an exploratory investigation on the suitability of periwinkle shells as coarse aggregate for concrete are reported. The tests show that the strength of concrete made with periwinkle shells are limited by the strength of the shells but high enough for structural concrete.
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Strength Characteristics of Periwinkle Shell Ash Blended Cement Concrete

International Journal of Architecture, Engineering and Construction, 2012
The study investigated the eect of periwinkle shell ash (PSA) as cement substitute on the strengths of concrete. Specimens were prepared from a mix of designed strength 25N=mm 2 and the replacement of cement with PSA was from 0% up to 40%. A total of 180 specimens were cast and tested for compressive and tensile splitting strength at 7 and up to 180 ...
Kolapo O. Olusola, Akaninyene A. Umoh
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Stimulated Biodegradation of Crude Oil in Soil Amended with Periwinkle Shells

Environmentalist, 2003
The potential of periwinkle shell (PS) in enhancing the microbial break down of crude oil spilled in soil were studied. The results revealed that the counts of crude oil degrading bacteria in oil-polluted soil fortified with PS were higher than the counts in unfortified soil.
U.J.J. Ijah, M. Ndana
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Effect of periwinkle shell on the physical and mechanical properties of sandcrete block

Nigerian Journal of Technological Research, 2022
Periwinkle shells are waste products derived from Periwinkles. They can be recycled and processed either as fine aggregate, coarse aggregate, filler, or cement replacement. This study investigates crushed periwinkle shells' suitability as an alternate material for natural sand in sandcrete hollow blocks for sustainable infrastructure.
Davies, Iyinoluwa E. E., Adigio, Emmanuel M.   +1 more
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Multi-Response Optimization of Stir Casting Parameter of New Nanocomposites Formulation of Al-Si-Mg Alloy Reinforced with Synthesis Carbon Nanotube and Periwinkle Shell Nanoparticles via Taguchi-Grey Approach

International Journal of Science and Engineering Invention
The optimal parameter settings for stir casting of the A-Si-Mg alloy reinforced with carbon nanotubes synthesized from rice husk (CNTs -derived RH) and periwinkle shell nanoparticle (PWSnp) nanocomposites were determined using the Taguchi-grey relational
V. C. Ezechukwu, Tamunonimim Kelsy Braide, C. C. Nwobi-Okoye   +2 more
semanticscholar   +1 more source

Biomaterials from Periwinkle Shells: Composition and Functional Properties

2007
The study evaluated the composition and functional properties of chitosan from the shells of two species of periwinkle L. punctata and N. natalensis. The chitosan samples from both species had a moisture content of 7–8%, ash 86–87% and crude fibre of 4%.
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Production of concrete using laterite, periwinkle shell and river stone

International Journal of Natural and Applied Sciences, 2013
This paper presents the success recorded in producing concrete using laterite, periwinkle shell and river stone. Laterite was used to replace 100% of sand. Periwinkle shell replaces 50% by volume of the total coarse aggregate, while river stone made up the rest 50%.
Ibearugbulem, OM, Ettu, LO, Ezeh, JC
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Shell Growth in the Periwinkle, Littorina litorea

The American Naturalist, 1932
Green, C V, Green, S K
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Characteristics of concrete produced with periwinkle and palm kernel shells as aggregates

FUTY Journal of the Environment, 2019
We assess the suitability of palm kernel shell (PKS) and periwinkle shell (PS) as partial or full replacement of fine and coarse aggregates respectively, in concrete production. First, the physical properties of PKS and PS were determined. Then concrete was produced using varying percentage replacements of 0%, 25%, 50% and 100% of fine and coarse ...
Dahiru, D, Yusuf, U.S., Paul, N.J.
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Unveiling high-performance carburized mild steel using coconut shell ash and CaCO_3 nanoparticles derived from periwinkle shell

The International Journal of Advanced Manufacturing Technology, 2023
O. Adedipe, V. Aigbodion, N. Agbo, S. A. Lawal, Oyebola AkanniWahab Oyeladun, J. Mokwa, E. Dauda   +6 more
semanticscholar   +1 more source