The role of moisture transport mechanisms on the performance of lightweight aggregates in internal curing

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dc.coverageDOI: 10.1016/j.conbuildmat.2020.121191
dc.creatorPaul, Alvaro
dc.creatorMurgadas, Sofía
dc.creatorDelpiano, José
dc.creatorMoreno-Casas, Patricio A.
dc.creatorWalczak, Magdalena
dc.creatorLopez, Mauricio
dc.date2021
dc.date.accessioned2025-11-18T19:46:51Z
dc.date.available2025-11-18T19:46:51Z
dc.description<p>Internal curing (IC) of concrete by pre-wetted lightweight aggregate (LWA) is an established technology to assist cement hydration and reduce shrinkage and cracking in concrete. However, the current understanding in what makes a certain LWA effective for IC gives opportunities to improve the technique. The aim of this article is to identify the moisture transport mechanisms within an LWA that govern IC performance. Results on LWA of different internal structures (natural, manufactured), and different size distributions (fine, coarse), pre-soaked with either pure water or water containing shrinkage reducing admixtures (SRA), indicate that there are different mechanisms involved in water uptake and release: one controlled by capillary action, and one controlled by air diffusion into the pore water. It is concluded that it is the internal structure, geometry, and particle size distribution of the LWA that determine the effect of SRA and the overall LWA impact on the IC performance. By using 3D micro-CT images LWAs are studied in order to determine which characteristics (pore size, pore connectivity, pore distribution) are better suited for improving IC. This contribution to understanding water transport in LWAs may help to engineer the characteristics of LWA optimized for IC applications.</p>eng
dc.identifierhttps://investigadores.uandes.cl/en/publications/221f5d39-b1b2-4a01-9088-494c6dac332b
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/54725
dc.languageeng
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.sourcevol.268 (2021) date: 2021-01-25
dc.subjectAbsorption
dc.subjectCT scan
dc.subjectDesorption
dc.subjectDiffusion
dc.subjectInternal curing
dc.subjectLightweight aggregate
dc.subjectPorosity
dc.titleThe role of moisture transport mechanisms on the performance of lightweight aggregates in internal curingeng
dc.typeArticleeng
dc.typeArtículospa
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