Evaluation of curing compound application time on concrete surface durability : [brief].
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2015-05-01
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Abstract:Roadways that are both durable and aesthetically pleasing are primary goals of Wisconsin
Department of Transportation (WisDOT) paving projects. Recently, Portland Cement Concrete
(PCC) pavement projects constructed by WisDOT have experienced increased amounts of
scaling within the first two years of service life. Scaling is a form of surface damage that can lead to
decreases in the aesthetic appeal, functionality and service life of a PCC pavement. Scaled pavements
typically demonstrate symptoms including surface roughness, exposed aggregates, collection of
loose scaled material on the surface and discontinuities in both the outward appearance and level of
the top layer of the pavement. Membrane-forming curing compounds (MFCCs) are used in paving
applications to properly ensure that the mix water within the mortar that comprises the top ¼ to ½
inch of the concrete pavement surface does not prematurely evaporate and inhibit hydration. However,
pavement projects using any one of several different WisDOT-approved curing compounds still
experienced scaling within a few years of construction.
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