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Terrasstabilisering i nordiskt klimat
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0003-1935-1743
Technical University Braunschweig, Germany.
2018 (Swedish)In: / [ed] Swedish Geotechnical Society, 2018Conference paper, Published paper (Refereed)
Abstract [sv]

Terrasstabilisering används fortfarande lite i Sverige, trots att idén är gammal och användningen är stor runt om i världen. Osäkerheten om frostpåverkan på stabiliserat jordmaterial är en huvudanledning för detta. Det här forsknings-projektet riktar sig mot att studera frost-stabiliteten av stabiliserad jord i de fall där stabiliseringen har skett med hydrauliska bindemedel, alltså kalk, cement, eller industriella restprodukter med liknande egenskaper, som t.ex. flygaska eller slagg. Resultat från labb-försök visar att en hållfasthetstillväxt sker även vid låga temperaturer och att hållfastheten direkt efter frys-tö-påverkan fortfarande är högre än hos det ursprungliga ostabiliserade materialet. Även en viss efter-härdning verkar ske. Generella slutsatsen är att terrasstabilisering kan löna sig även i nordiskt klimat.

Abstract [en]

Subsoil stabilisation is only seldom applied in Sweden in spite of the fact that the idea is already old and used all over the world. One main reason for this is the uncertainty about the frost-stability of the stabilised soil material. This research project focusses on frost-resistance of soil stabilised with hydraulic binder, meaning lime, cement or industrial residual products, e.g. fly-ash or slag. Lab experiments showed increasing strength even at low temperature. Moreover, the strength directly after freeze-thaw still exceeds the non-stabilised soil. In addition, the experiments indicate a hardening process even after freeze-thaw cycles. The general conclusion is that subsoil stabilisation can be worthwhile even in Nordic climate.

Place, publisher, year, edition, pages
2018.
Keywords [en]
subsoil, stabilization, hydraulic binder, clay, freeze/thaw, cold climate
Keywords [sv]
jordstabilisering, hydraulisk bindemedel, lera, frysning/tining, frys/tö
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-77436OAI: oai:DiVA.org:ltu-77436DiVA, id: diva2:1386022
Conference
Grundläggningsdagen 2018, Stockholm, march 15, 2018
Funder
Swedish Research Council FormasSwedish Transport AdministrationAvailable from: 2020-01-16 Created: 2020-01-16 Last updated: 2020-01-17
In thesis
1. Near-surface soil stabilisation to reduce the frost susceptibility of soft soils
Open this publication in new window or tab >>Near-surface soil stabilisation to reduce the frost susceptibility of soft soils
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Alternative title[sv]
Ytstabilisering av terass för att minska påverkan av frysning
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2018
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-71219 (URN)978-91-7790-230-0 (ISBN)978-91-7790-231-7 (ISBN)
Presentation
2018-12-11, F 1031, Laboratorievägen 16, Luleå, 13:00 (English)
Supervisors
Funder
Swedish Transport Administration
Available from: 2018-10-16 Created: 2018-10-16 Last updated: 2020-01-16Bibliographically approved

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