Effects of Elevated Temperature on Concrete with Recycled Coarse Aggregates

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dc.contributor.authorSalau, M. O
dc.contributor.authorOseafiana, O. J
dc.contributor.authorOyegoke, T. O
dc.date.accessioned2017-10-31T16:42:54Z
dc.date.available2017-10-31T16:42:54Z
dc.date.issued2015
dc.descriptionConference Paperen_US
dc.description.abstractThis paper discusses the effects of heating temperatures of 200°C, 400°C and 600°C each for 2 hours at a heating rate of 2.5°C/min on concrete with the content of Natural Coarse Aggregates (NCA) partially replaced with Recycled Coarse Aggregates (RCA), obtained from demolished building in the ratio of 0%, 15% and 30%. There was an initial drop in strength from 100°C to 200°C which is suspected to be due to the relatively weak interfacial bond between the RCA and the hardened paste within the concrete matrix;a gradual increase in strength continued from 200°C to 450°C and steady drop occurred again as it approached 600°C.With replacement proportion of 0%, 15% and 30% of NCA and exposure to peak temperature of 600°C, a relative concrete strength of 23.6MPa, 25.3MPa and 22.2MPa respectively can be achieved for 28 days curing age. Furthermore, RAC with 15% NCA replacement when exposed to optimum temperature of 450°C yielded high compressive strength comparable to that of control specimen (normal concrete). In addition, for all concrete samples only slight surface hairline cracks were noticed as the temperature approached 400°C. Thus, the RAC demonstrated behavior just like normal concrete and may be considered fit for structural use.en_US
dc.identifier.citationSalau, M. O; Oseafiana, O. J, Oyegoke, T. O (2017) Effects of Elevated Temperature on Concrete with Recycled Coarse Aggregates. Being a paper presented at the 2nd International Conference on Innovative Materials, Structures and Technologies.en_US
dc.identifier.uriiopscience.iop.org/article/10.1088/1757-899X/96/1/012078/meta
dc.identifier.urihttp://ir.unilag.edu.ng:8080/xmlui/handle/123456789/2691
dc.language.isoenen_US
dc.relation.ispartofseriesConference Paper;
dc.subjectElevated Temperatureen_US
dc.subjectRecycled Coarse Aggregatesen_US
dc.titleEffects of Elevated Temperature on Concrete with Recycled Coarse Aggregatesen_US
dc.typePresentationen_US
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