Effect of Formwork, Wall Thickness, and Addition of Fly Ash on Concrete Hydration

dc.contributor.authorGupta, Rishien
dc.contributor.authorKatie, Kuderen
dc.date.accessioned2016-05-24T12:32:55Z
dc.date.available2016-05-24T12:32:55Z
dc.date.copyright2014en_US
dc.date.issued2014-08
dc.description.abstractThe use of different forming materials, insulating materials, and stripping times can significantly affect the maturity and hence the strength gain of concrete within forming systems. This information can be vital in determining the stripping time of scaffolding and formwork. In this project, maturity and compression tests were performed on specimens (simulating scaled-down walls) formed using a polyvinyl chloride stay-in-place (SIP) forming system with and without insulation. The findings were then compared to data obtained from walls formed by wood formwork, which is the material typically used in the field. The various parameters studied in this project were wall thickness, type of forming material, insulation, and addition of fly ash. The results indicate that with an increase in wall thickness, the peak temperature and the temperature development index (TDI) increased proportionally. TDI is defined as the area under the temperature-versus-time curve measured from the dormant temperature to the peak temperature. The data show that the proposed TDI was a good indicator of the extent of the hydration reaction, and with further research the relationship between temperature development and strength gain of concrete could be clearly identified. Increases in the peak temperature and TDI were noted in wood forming systems relative to SIP systems and in insulated systems relative to un-insulated systems. The use of fly ash in concrete resulted in a lower temperature peak and TDI and a delay in reaching peak temperature. However, the use of concrete containing fly ash in insulated SIP systems led to a higher TDI than a conventional concrete mix formed in wood forms, indicating better concrete maturity at the same age.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThe writers thank Octaform Systems Inc. for sponsoring this project and for providing the materials and technical expertise for this project. The writers also acknowledge the contributions of the Seattle University senior design team comprising Kristian Lowrie, David Sommer, and Nikki Wheeler.en_US
dc.identifier.citationGupta, R. & Kuder, K. (2014). Effect of formwork, wall thickness, and addition of fly ash on concrete hydration. Advances in Civil Engineering Materials, 3(1), 479-494.en_US
dc.identifier.urihttp://dx.doi.org/10.1520/ACEM20140015
dc.identifier.urihttp://hdl.handle.net/1828/7316
dc.language.isoenen_US
dc.publisherAdvances in Civil Engineering Materialsen_US
dc.subjectPVC SIP formworken_US
dc.subjectconcrete with fly ashen_US
dc.subjectinsulationen_US
dc.subjectmaturityen_US
dc.titleEffect of Formwork, Wall Thickness, and Addition of Fly Ash on Concrete Hydrationen_US
dc.typeArticleen_US

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