Using Isothermal Calorimetry to Assess the Water Absorbed by Fine LWA during Mixing

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dc.contributor.authorCastro, Javier
dc.contributor.authorDe la Varga, Igor
dc.contributor.authorWeiss, Jason
dc.date.accessioned2024-01-10T12:10:39Z
dc.date.available2024-01-10T12:10:39Z
dc.date.issued2012
dc.description.abstractFine lightweight aggregate (LWA) is being increasingly used for the manufacture of internally cured concrete. Internally cured concrete can be viewed as a concrete that contains fluid (water) in the pores of the LWA (or other porous inclusions) that can be released to the paste after setting. Most research performed on internally cured concrete assumes the LWA has been prewetted for some time before mixing (generally lab studies use 24-h soaking, whereas this value varies in practice). The research described in this paper investigated the potential for using aggregate that begins the mixing process from a different moisture state (i.e., not 24-h prewetting). Specifically, this paper considers oven-dry aggregate as a worst-case scenario to determine how much water would be absorbed by the LWA during the mixing and placement processes. To determine the amount of water absorbed by the LWA, isothermal calorimetry was used. Two different mixing scenarios were investigated, showing that 56-71% of the 24-h water absorption could be achieved using the worst-case scenario of oven-dry aggregates. Although the use of oven-dry aggregate would be extremely rare for a field application (except for possible application to bagged products), this approach could be extended to include fine LWA with other initial moisture conditions. DOI: 10.1061/(ASCE)MT.1943-5533.0000496. (C) 2012 American Society of Civil Engineers.
dc.description.funderExpanded Shale, Clay and Slate Institute (ESCSI)
dc.description.funderJoint Transportation Research Program
dc.description.funderPurdue University
dc.fechaingreso.objetodigital2024-04-25
dc.format.extent10 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1061/(ASCE)MT.1943-5533.0000496
dc.identifier.eissn1943-5533
dc.identifier.issn0899-1561
dc.identifier.urihttps://doi.org/10.1061/(ASCE)MT.1943-5533.0000496
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76594
dc.identifier.wosidWOS:000311387900007
dc.information.autorucIngeniería;Castro J;S/I;15224
dc.issue.numero8
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final1005
dc.pagina.inicio996
dc.publisherASCE-AMER SOC CIVIL ENGINEERS
dc.revistaJOURNAL OF MATERIALS IN CIVIL ENGINEERING
dc.rightsacceso restringido
dc.subjectLightweight aggregate
dc.subjectInternal curing
dc.subjectLWA absorption capacity
dc.subjectCalorimetry
dc.subjectCement hydration
dc.subjectLIGHTWEIGHT AGGREGATE
dc.subjectABSORPTION
dc.subjectHYDRATION
dc.subjectCONCRETE
dc.subject.ods12 Responsible Consumption and Production
dc.subject.odspa12 Producción y consumo responsable
dc.titleUsing Isothermal Calorimetry to Assess the Water Absorbed by Fine LWA during Mixing
dc.typeartículo
dc.volumen24
sipa.codpersvinculados15224
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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