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Wet casting of multiple mix horizontally layered concrete elements

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Brault, Andre 

Abstract

Functionally graded concrete, where multiple mixes are layered in structural elements, is a promising technology for minimising cement use. However, a challenge when fabricating wet-on-wet graded concrete is the control of the fresh state deformations of multiple mixes cast into the same mould. Horizontally cast elements with two different concrete mix layers were investigated to ascertain the influence of mix density, workability and layer sequence on the intended material placement. Horizontal layers were achievable unless the workability of the top layer was much stiffer than that of the bottom, or the top layer was denser and both mixes were fluid. The findings underpin opportunities for the exploitation of lower carbon materials and cement efficiency.

Description

Keywords

Concrete, Rheology, Slump, Functionally graded concrete, Multi-layered casting, Light weight aggregates, Cement

Journal Title

Construction and Building Materials

Conference Name

Journal ISSN

0950-0618
1879-0526

Volume Title

Publisher

Elsevier
Sponsorship
Engineering and Physical Sciences Research Council (EP/N017668/1)
EPSRC Established Career Fellowship “Tailored Reinforced Concrete Infrastructure: Boosting the Innate Response to Chemical and Mechanical Threats” [reference number: EP/N017668/1]
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