Please use this identifier to cite or link to this item:
http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/10043
Title: | Behaviour of concrete specimens retrofitted with bio-based polyurethane coatings under dynamic loads |
Authors: | Somarathna, H.M.C.C. Raman, S.N. Mohotti, D. Mutalib, A.A. Badrie, K.H. |
Keywords: | Bio-based Polyurethane elastomer;Coating thickness :Concrete;Dynamic loading;Retrofitting |
Issue Date: | 2021 |
Publisher: | Elsevier |
Abstract: | Experimental investigationwasconductedusingconcretespecimenstoassesstheeffectivenessofbiobasedpolyurethane(PU)coatingsynthesizedfrompalmkerneloilinenhancingthedynamicmechanical responseofconcretespecimensunderquasi-staticanddynamicloads.Thedynamicloadingcondition wassimulatedbyconductingthree-pointbendingtestsatastrainrateof0.067s 1,andsimultaneously, under quasi-static loading(strainrateof0.00033s 1)conditions .The application of PU layer(s)(either on the impact face, reface ,or on both faces of the concrete specimens)increases the dynamic resistance of theconcreteelement,whichcanbeenhancedbyincreasingcoatingthicknessoneitherfaceoftheconcreteelement.Underdynamicconditions,with10%of total coating thickness compared to the beam depth, strainduringultimatefailure,andstrainenergydensitywereenhancedsignificantlywithmarginalenhancementintheultimateflexuralstrength.PUcoatingdoesnotdebondduringultimatefailure of the test specimens which implies good adhesion characteristics, and even with minimum coating thickness(2.5%),drasticfragmentationeffectscanbereduced.Bio-basedPUisagreenmaterialandapplicationof PU coating provides available and sustainable technique for protecting concrete structures against dynamic loads. |
URI: | http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/10043 |
DOI: | https://doi.org/10.1016/j.conbuildmat.2020.121860 |
Appears in Collections: | Civil Engineering |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Behaviourofconcretespecimensretrofittedwithbio-based polyurethanecoatingsunderdynamicloads.pdf | 4.15 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.