Analysis of shear rate inside a concrete truck mixer

Wallevik, Jon Elvar; Wallevik, Olafur Haralds

dc.contributor	Háskólinn í Reykjavík
dc.contributor	Reykjavik University
dc.contributor.author	Wallevik, Jon Elvar
dc.contributor.author	Wallevik, Olafur Haralds
dc.date.accessioned	2020-03-12T13:17:59Z
dc.date.available	2020-03-12T13:17:59Z
dc.date.issued	2017-05
dc.identifier.citation	Wallevik, J. E., & Wallevik, O. H. (2017). Analysis of shear rate inside a concrete truck mixer. Cement and Concrete Research, 95, 9–17. https://doi.org/10.1016/j.cemconres.2017.02.007
dc.identifier.issn	0008-8846
dc.identifier.issn	1873-3948 (eISSN)
dc.identifier.uri	https://hdl.handle.net/20.500.11815/1591
dc.description.abstract	In addition to the mixing energy applied to the fresh concrete (i.e. shearing during mixing), the shear history after mixing is also important. This applies especially to binder rich concretes like the different types of high performance concrete (HPC). With this in mind, the shear rate is analyzed inside a drum of a concrete truck mixer. The objective is to better understand the effect of transport of fresh concrete, from the ready mix plant to the building site. The analysis reveals the effect of different drum charge volume and drum rotational speed. Also, the effect of yield stress and plastic viscosity is investigated. The work shows that the shear rate decreases in an exponential manner with increasing drum charge volume. It is also shown that for a given drum speed, the shear rate decreases both with increasing plastic viscosity and yield stress.
dc.description.sponsorship	This work has been funded by the Icelandic Centre for Research - RANNIS [grant numbers 163382-051, 1006100202], Norcem AS (Heidelberg Cement Group) and ReadyMix Abu Dhabi.
dc.format.extent	9-17
dc.language.iso	en
dc.publisher	Elsevier BV
dc.relation.ispartofseries	Cement and Concrete Research;95
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Truck mixer
dc.subject	Shear rate
dc.subject	Fresh concrete
dc.subject	Rheology
dc.subject	Finite volume method
dc.subject	Fluid mechanics
dc.subject	Fluid dynamics
dc.subject	Cement
dc.subject	Steinsteypa
dc.subject	Sement
dc.subject	Straumfræði
dc.subject	Hreyfifræði
dc.subject	Bútaaðferð
dc.title	Analysis of shear rate inside a concrete truck mixer
dc.type	info:eu-repo/semantics/article
dcterms.license	This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
dc.description.version	"Peer Reviewed"
dc.identifier.journal	Cement and Concrete Research
dc.identifier.doi	10.1016/j.cemconres.2017.02.007
dc.contributor.department	ICI Rheo Center (RU)
dc.contributor.school	Tækni- og verkfræðideild (HR)
dc.contributor.school	School of Science and Engineering (RU)