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dc.contributor.authorAlhawat, Musab
dc.contributor.authorAshour, Ashraf F.
dc.date.accessioned2019-11-08T12:42:59Z
dc.date.accessioned2019-11-26T14:34:10Z
dc.date.available2019-11-08T12:42:59Z
dc.date.available2019-11-26T14:34:10Z
dc.date.issued2019
dc.identifier.citationAlhawat M and Ashour AF (2019) Bond strength between corroded steel and recycled aggregate concrete incorporating nano silica. Construction and Building Materials. Accepted for Publication.en_US
dc.identifier.urihttp://hdl.handle.net/10454/17507
dc.descriptionYesen_US
dc.description.abstractLimited information related to the application of nano silica in recycled aggregate concretes has been available in the literature. However, investigations on the effect of nano silica on the bond performance of reinforcement embedment length in recycled aggregate concrete have not been conducted yet. Therefore, the present study aimed at investigating the bond strength for recycled aggregate concretes incorporating nano silica under different levels of corrosive environments. The experimental work consisted of testing 180 pull-out specimens prepared from different mixtures. The main parameters studied were the amount of recycled aggregate (i.e. 0%, 25%, 50% and 100%), nano silica (1.5% and 3%), embedment length (5 and 13Ø) as well as reinforcement diameter (12 and 20mm). Different levels of corrosion were electrochemically induced by applying impressed voltage technique for 2, 5, 10 and 15 days. Finally, the experimental results were compared with the existing models. Experimental results showed that the bond performance between un-corroded steel and RCA concrete slightly reduced, while a significant degradation was observed after being exposed to corrosive conditions, in comparison to normal concrete. On the other hand, the use of a small quantity of NS (1.5%) showed between 8 and 21% bond enhancement with both normal and RCA concretes under normal conditions. However, much better influence was observed with the increase of corrosion periods, reflecting the improvement in corrosion resistance. NS particles showed a more effective role with RCA concretes rather than conventional concretes in terms of enhancing bond and corrosion resistance. Therefore, it was superbly effective in recovering the poor performance in bond for RCA concretes. By doubling the content of NS (3%), the bond resistance slightly enhanced for non-corroded samples, while its influence becomes more pronounced with increasing RCA content as well as exposure time to corrosion.en_US
dc.language.isoenen_US
dc.subjectBond strengthen_US
dc.subjectRecycled aggregate concreteen_US
dc.subjectNano silicaen_US
dc.subjectCorrosion rateen_US
dc.subjectPull-out testen_US
dc.titleBond strength between corroded steel and recycled aggregate concrete incorporating nano silicaen_US
dc.status.refereedYesen_US
dc.typeArticleen_US
dc.type.versionAccepted manuscripten_US
dc.description.publicnotesThe full-text of this article will be released for public view at the end of the publisher embargo - 12 months after publication.en_US
dc.date.updated2019-11-08T12:43:02Z
refterms.dateFOA2019-11-26T14:34:38Z


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