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In situ observations and laboratory testing of shrinkage cracking in shotcrete on soft drains
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.
2015 (English)Conference paper (Refereed)
Abstract [en]

In Scandinavian traffic tunnels soft drains covered with shotcrete are often installed to lead away un-wanted water, giving little resistance to shotcrete shrinkage, which may cause severe cracking. Mapping of shrinkage cracks was done in situ, followed by analyses focused on stresses due to drying shrinkage and various time of waiting between turns of spraying, with or without water curing. The effect of dilatation joints has also been investigated. A recently developed laboratory test set-up with shotcrete on instrumented granite slabs represent shrinkage of shotcrete on soft drains. The test results indicate that addition of glass fibres could reduce the cracking problem.

Place, publisher, year, edition, pages
2015.
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-182574OAI: oai:DiVA.org:kth-182574DiVA: diva2:904789
Conference
Spritzbeton – Tagung, Alpbach, 2015
Note

QC 20160318

Available from: 2016-02-19 Created: 2016-02-19 Last updated: 2016-03-18Bibliographically approved

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Ansell, AndersBryne, Lars Elof
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ReferencesLink to record
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