Expansive fracture agent behaviour for concrete cracking

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dc.contributor.author Laefer, Debra F.
dc.contributor.author Ceribasi, Seyit
dc.contributor.author Wortman, John
dc.contributor.author Abrozevitch-Cooper, Nicole
dc.contributor.author Huynh, Minh-Phuoc
dc.contributor.author Midgette, J.
dc.date.accessioned 2012-01-19T17:20:01Z
dc.date.available 2012-01-19T17:20:01Z
dc.date.copyright 2010 Thomas Telford Ltd en
dc.date.issued 2010-06
dc.identifier.citation Magazine of Concrete Research en
dc.identifier.issn 0024-9831
dc.identifier.issn 1751-763X
dc.identifier.uri http://hdl.handle.net/10197/3441
dc.description.abstract Increasing concerns regarding litigation and terrorism provide a strong dual motivation to decrease high explosives usage in the construction industry. This paper provides parameter considerations and initial guidelines for the application of expansive fracture agents, typically used for concrete and soft rock removal. This approach may be especially appropriate near environmentally and historically sensitive sites. Thirty-three unreinforced blocks (approximately a cubic meter each) of varying strengths composed of sand, cement, and flyash were tested under various temperature environments, with differing expansive agents, confinement levels, and post-cracking treatments. Cracking characteristics such as crack initiation and crack expansion were analyzed. Although the performance of expansive cement was dependent upon a highly complex set of variable interactions, higher ambient temperatures, higher agent mixture temperatures, and chemical configuration designed for colder temperatures decreased the time to first crack and hastened the extent of cracking. Conversely, higher strength material required more time to first crack, as well as an extended time to achieve a 25.4 mm wide crack. Manual interference with the normal material volume expansion slowed the cracking process but did not truncate it, while the manufacturer’s recommendation to introduce water post-cracking actually reduced and slowed the extent of cracking. en
dc.description.sponsorship Irish Research Council for Science, Engineering and Technology en
dc.description.uri Journal website en
dc.description.uri www.concrete-research.com en
dc.format.extent 1019271 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Institution of Civil Engineers/Thomas Telford Publishing en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.subject Soundless chemical demolition agents (SCDAs) en
dc.subject Demolition en
dc.subject Concrete en
dc.subject Cracking en
dc.subject.lcsh Wrecking en
dc.subject.lcsh Expansive concrete en
dc.subject.lcsh Concrete--Cracking en
dc.subject.lcsh Chemicals en
dc.title Expansive fracture agent behaviour for concrete cracking en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions http://dx.doi.org/10.1680/macr.2010.62.6.443 en
dc.status Peer reviewed en
dc.identifier.volume 62 en
dc.identifier.issue 6 en
dc.identifier.startpage 443 en
dc.identifier.endpage 452 en
dc.identifier.doi 10.1680/macr.2010.62.00.1
dc.neeo.contributor Laefer|Debra F.|aut| en
dc.neeo.contributor Ceribasi|Seyit|aut| en
dc.neeo.contributor Wortman|John|aut| en
dc.neeo.contributor Abrozevitch-Cooper|Nicole|aut| en
dc.neeo.contributor Huynh|Minh-Phuoc|aut| en
dc.neeo.contributor Midgette|J.|aut| en
dc.description.admin Link to journal page www.concrete-research.com is a publisher requirement - AV 25/11/2011 au, ti, - kpw13/1/12 en

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