Load spreading in ultra‑thin high-strength steel-fibre-reinforced concrete pavements

dc.contributor.authorSmit, Martha Sophia
dc.contributor.authorKearsley, Elsabe P.
dc.contributor.emailelsabe.kearsley@up.ac.zaen_US
dc.date.accessioned2022-09-07T10:24:55Z
dc.date.available2022-09-07T10:24:55Z
dc.date.issued2021-12
dc.description.abstractUltra-Thin Continuously Reinforced Concrete Pavement (UTCRCP) consists of a 50 mm thin High- Strength Steel-Fibre-Reinforced Concrete (HS-SFRC) overlay placed on existing pavements as rehabilitation or used as part of new pavements. Difficulties have been experienced with the construction of UTCRCP. Additionally, the thin HS-SFRC has superior fatigue properties, but poor load-spreading ability compared to conventional concrete pavements due to its reduced thickness. This results in high deflections when the pavement is loaded. The substructure of UTCRCP plays an important role in its performance. Cement-stabilised granular materials can be used to ensure gradual load spreading with depth, but its behaviour under flexible concrete layers is not yet well understood. In this study the effect of increasing the HS-SFRC layer thickness and the effect of incorporating cement-stabilised base layers were investigated using linear elastic finite element modelling. From stress levels calculated, it was found that C1 and C2 materials perform well underneath a 50 mm HS-SFRC layer subjected to standard axle loads of 80 kN, while C3 and C4 would deteriorate faster. Stabilised layers placed below a thin, flexible concrete layer may however crack, resulting in increased damage to supporting layers. It is recommended that the response of UTCRCP should be investigated using advanced material models for the cement-stabilised base and other substructure layers.en_US
dc.description.departmentCivil Engineeringen_US
dc.description.librarianam2022en_US
dc.description.urihttp://www.journals.co.za/ej/ejour_civileng.htmlen_US
dc.identifier.citationSmit, M.S. & Kearsley, E.P. Load spreading in ultra-thin high-strength steel-fibre-reinforced concrete pavements. Journal of the South African Institution of Civil Engineering 2021:63(4), Art. #1168, 8 pages. http://dx.DOI.org/10.17159/2309-8775/2021/v63n4a5.en_US
dc.identifier.issn1021-2019 (online)
dc.identifier.other10.17159/2309-8775/2021/v63n4a5
dc.identifier.urihttps://repository.up.ac.za/handle/2263/87104
dc.language.isoenen_US
dc.publisherSouth African Institution of Civil Engineeringen_US
dc.rightsSouth African Institution of Civil Engineeringen_US
dc.subjectUltra-thin concrete pavementsen_US
dc.subjectCement-stabilised basesen_US
dc.subjectFinite element modellingen_US
dc.subjectLoad spreadingen_US
dc.subjectUltra-thin continuously reinforced concrete pavement (UTCRCP)en_US
dc.subjectHigh-strength steel-fibre-reinforced concrete (HS-SFRC)en_US
dc.titleLoad spreading in ultra‑thin high-strength steel-fibre-reinforced concrete pavementsen_US
dc.typeArticleen_US

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Smit_Load_2021.pdf
Size:
327.93 KB
Format:
Adobe Portable Document Format
Description:
Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description: