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Title: Influence of thixotropy determined by different test methods on formwork pressure of self-consolidating concrete
Authors: Tuyan, Murat
Ahari, Reza Saleh
Erdem, Tahir Kemal
Andiç Çakır, Özge
Ramyar, Kambiz
Keywords: Formwork pressure
Self-consolidating concrete
Thixotropy methods
Concrete mixtures
Publisher: Elsevier Ltd.
Source: Tuyan, M., Ahari, R. S., Erdem, T. K., Andiç Çakır, Ö., and Ramyar, K. (2018). Influence of thixotropy determined by different test methods on formwork pressure of self-consolidating concrete. Construction and Building Materials, 173, 189-200. doi:10.1016/j.conbuildmat.2018.04.046
Abstract: In this experimental study, the influence of thixotropy determined by different test methods on the formwork pressure of self-consolidating concrete (SCC) with varying compositions was investigated. In order to determine the effect of water/binder (w/b) ratio, slump flow diameter and coarse aggregate/total aggregate (CA/TA) ratio on thixotropy and formwork pressure of SCC, fifteen concrete mixtures were prepared. Four different test methods i.e., “structural break-down area” (SBDA), “break-down percentage” (BDP), “drop in apparent viscosity” (DAV) and “yield value at rest” (YVR) were performed to determine the thixotropy of the SCC mixtures. Test results showed that the SBDA, DAV and YVR methods were more appropriate to evaluate the thixotropy of SCC than the BDP method. A strong correlation between thixotropy and formwork pressure was found using SBDA, DAV and YVR methods in SCC mixtures having low w/b ratio. There was a strong relationship between thixotropy determined by SBDA, BDP and DAV methods and formwork pressure in low slump flow SCC mixtures, while thixotropy determined by the YVR method showed good correlation with the formwork pressure in SCC mixtures having high slump flow values. Finally, new models were developed to estimate the formwork pressure of all kinds of mixtures as a function of thixotropy and time. The models were found to be successful for each of the thixotropy measurement method.
ISSN: 0950-0618
Appears in Collections:Civil Engineering / İnşaat Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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