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Article: Heat loss compensation in semi-adiabatic curing test of concrete

TitleHeat loss compensation in semi-adiabatic curing test of concrete
Authors
KeywordsAdiabatic curing test
Early thermal cracking
Semi-adiabatic curing test
Issue Date2008
PublisherAmerican Concrete Institute. The Journal's web site is located at http://www.concrete.org/PUBS/JOURNALS/MJHOME.ASP
Citation
Aci Materials Journal, 2008, v. 105 n. 1, p. 52-61 How to Cite?
AbstractTo alleviate early thermal cracking of concrete, a maximum limit is often imposed on the adiabatic temperature rise, which has to be measured by an adiabatic curing test using a specially designed curing chamber. In practice, for convenience and simplicity, the curing tests conducted on site are not truly adiabatic and thus should be regarded as semi-adiabatic. In a semi-adiabatic curing test, due to heat loss, the measured temperature rise is lower than .the adiabatic temperature rise by an error dependent on the specimen size and the heat insulation provided. Herein, to minimize such error, a heat loss compensation method of estimating the heat loss from the spatial and time variations of the measured temperature and compensating for the heat loss, accordingly, is proposed. Ten laboratory-made concrete mixtures were tested to verify the applicability of the method. In addition, two batches of ready mixed concrete, each cast into 0.5 and 1.0 m (1.64 and 3.28 ft) cubes, were tested to demonstrate how a semi-adiabatic curing test could become independent of specimen size and much less affected by imperfect insulation after heat loss compensation. With the proposed heat loss compensation applied, the errors in the adiabatic temperature rise were all within ±1.3 °C (±2.3 °F). Copyright © 2008, American Concrete Institute. All rights reserved,.
Persistent Identifierhttp://hdl.handle.net/10722/71712
ISSN
2015 Impact Factor: 1.154
2015 SCImago Journal Rankings: 1.430
References

 

DC FieldValueLanguage
dc.contributor.authorNg, PLen_HK
dc.contributor.authorNg, IYTen_HK
dc.contributor.authorKwan, AKHen_HK
dc.date.accessioned2010-09-06T06:34:29Z-
dc.date.available2010-09-06T06:34:29Z-
dc.date.issued2008en_HK
dc.identifier.citationAci Materials Journal, 2008, v. 105 n. 1, p. 52-61en_HK
dc.identifier.issn0889-325Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/71712-
dc.description.abstractTo alleviate early thermal cracking of concrete, a maximum limit is often imposed on the adiabatic temperature rise, which has to be measured by an adiabatic curing test using a specially designed curing chamber. In practice, for convenience and simplicity, the curing tests conducted on site are not truly adiabatic and thus should be regarded as semi-adiabatic. In a semi-adiabatic curing test, due to heat loss, the measured temperature rise is lower than .the adiabatic temperature rise by an error dependent on the specimen size and the heat insulation provided. Herein, to minimize such error, a heat loss compensation method of estimating the heat loss from the spatial and time variations of the measured temperature and compensating for the heat loss, accordingly, is proposed. Ten laboratory-made concrete mixtures were tested to verify the applicability of the method. In addition, two batches of ready mixed concrete, each cast into 0.5 and 1.0 m (1.64 and 3.28 ft) cubes, were tested to demonstrate how a semi-adiabatic curing test could become independent of specimen size and much less affected by imperfect insulation after heat loss compensation. With the proposed heat loss compensation applied, the errors in the adiabatic temperature rise were all within ±1.3 °C (±2.3 °F). Copyright © 2008, American Concrete Institute. All rights reserved,.en_HK
dc.languageengen_HK
dc.publisherAmerican Concrete Institute. The Journal's web site is located at http://www.concrete.org/PUBS/JOURNALS/MJHOME.ASPen_HK
dc.relation.ispartofACI Materials Journalen_HK
dc.subjectAdiabatic curing testen_HK
dc.subjectEarly thermal crackingen_HK
dc.subjectSemi-adiabatic curing testen_HK
dc.titleHeat loss compensation in semi-adiabatic curing test of concreteen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0889-325X&volume=105&issue=1&spage=52&epage=61&date=2008&atitle=Heat+loss+compensation+in+semi-adiabatic+curing+test+of+concreteen_HK
dc.identifier.emailNg, IYT: ivanytng@graduate.hku.hken_HK
dc.identifier.emailKwan, AKH: khkwan@hkucc.hku.hken_HK
dc.identifier.authorityNg, IYT=rp00156en_HK
dc.identifier.authorityKwan, AKH=rp00127en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-39749099495en_HK
dc.identifier.hkuros152077en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-39749099495&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume105en_HK
dc.identifier.issue1en_HK
dc.identifier.spage52en_HK
dc.identifier.epage61en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridNg, PL=15045284100en_HK
dc.identifier.scopusauthoridNg, IYT=12243904600en_HK
dc.identifier.scopusauthoridKwan, AKH=7101738204en_HK

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