Thermo-mechanical assessment of concrete microcracking damage due to early-age temperature rise

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dc.contributor.authorZunino, Franco
dc.contributor.authorCastro, Javier
dc.contributor.authorLópez, Mauricio
dc.date.accessioned2016-08-10T21:34:04Z
dc.date.available2016-08-10T21:34:04Z
dc.date.issued2015
dc.description.abstractThe pursuit of high early-age strength concrete has led to mixtures with higher heat of hydration rates at early ages which produces higher temperatures and an overall increased risk of cracking. This study uses a two-phase micromechanical model to compute thermal stresses based on both coefficient of thermal expansion (CTE) and elastic Young's modulus (E) mismatches between aggregates and the cementitious matrix. Concrete specimens were prepared using four types of coarse aggregates (different CTE and E), and subjected to temperature cycles to generate thermal cracking. Fluorescence microscopy, compressive strength, dynamic elastic Young's modulus, and electrical resistivity were used to characterize the effect of this induced thermal cracking. Experimental results were in agreement with the two-phase model and it was concluded that the interaction pressure (P) between phases could be used to estimate the impact on the mechanical and transportation properties of a temperature gradient at early age. (c) 2015 Elsevier Ltd. All rights reserved.
dc.identifier.citationFranco Zunino, Javier Castro, Mauricio Lopez. Thermo-mechanical assessment of concrete microcracking damage due to early-age temperature rise. Construction and Building Materials, and Building Materials, 2015, vol. 81, p. 140-153
dc.identifier.urihttp://hdl.handle.net/11447/727
dc.identifier.urihttp://dx.doi.org/10.1016/j.conbuildmat.2014.12.126
dc.language.isoen_US
dc.titleThermo-mechanical assessment of concrete microcracking damage due to early-age temperature rise
dc.typeArtículo

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