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Effect of Immersion Medium on the Compressive Strength of Steel-Reinforced Concretes

Okeniyi, J. O. (2015) Effect of Immersion Medium on the Compressive Strength of Steel-Reinforced Concretes. In: International Conference on African Development Issues (CU-ICADI) 2015: Materials Technology Track, African Leadership Development Centre, Covenant University Canaanland, Ota Ogun State, Nigeria.

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F1·equent collapse of steel-1·einfo1·ced connete stmctm·es in 1·ecent times and the attendant safety I"isks of this to life and pmpe1·ties necessitates studying comp1·essive sh·ength of steel-1·einfo1·ced connete matel"ial in theii· se1-vice-envimnment. In the pape1·, effect of the ambient se1·vice-envimnments that were simulated as fom· different labonto1·y models of immei"Sion test-media, on the mechanical pmpe1·ty of comp1·essive sti·ength of steelI" einfm-ced connete specimens was investigated. These testmedia include 0.5 M H 2S04, 3.5% NaCl, distilled water and ambient ail· fo1· simulating diffe1·ent se1·vice-envimnments of steel-1·einfm-ced connetes. Fo1· the study, duplicated steelI" einfm-ced connete samples we1·e subjected to comp1·essive sh·ength testing and analyses, as per ASTM C39/C39M-03 and ASTM C267-01, of 124 days post-connete casting age, 96 of which the samples we1·e imme1·sed in theil" different test-medium. Results showed that out of the diffe1·ent media of concrete immei"Sion, comp1·essive sh·ength was lowest in the steel-1·einfm-ced concrete specimens that we1·e pa1·tially immei"Sed in the 0.5 M H 2S04 test-medium, simulating industl"ial/minobial envimnments. In contnst, optimal comp1·essive sti·ength impmvement was obse1·ved in the samples that we1·e pa1·tially immersed in distilled wate1·, fo1· simulating atmosphel"ic water, fmm nin. The 1·esults of comp1·essive sti·ength encounte1·ed in many of the samples studied, in theii· medium of test-immei"Sion, ba1·e implications on the need to fm-tify steel-1·einfo1·ced connetes designed fo1· the comp1·essive sh·ength 1·educing environments with comp1·essive sti·ength impmving admixtm·e fm· ensul"ing sustainable/stmctunl dunbility of connete sti·uctm·es.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Steel-1·einfm-ced connete matel"ial, comp1·essive sti·ength testing, comp1·essive sti·ength analyses, se1·vice-envimnments of consti·uction matel"ial
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 21 Jun 2015 23:46
Last Modified: 21 Jun 2015 23:46

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