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Accelerated load testing of pavements: HVS-NORDIC tests at VTI Sweden 2003-2004
Swedish National Road and Transport Research Institute.
2006 (English)Report (Other academic)
Abstract [sv]

Under åren 2003 och 2004 genomfördes två tester med accelererad provning i VTI:s provhallar i Linköping, (SE05 och SE06).

Syftet med testet SE05 var att jämföra deformationsegenskaperna hos två olika bärlagermaterial. Två vägkonstruktioner byggdes parallellt i en av VTI:s provhallar. Den ena med bärlager av naturmaterial (Olivehult) och den andra med krossat berg (Skärlunda). Båda konstruktionerna kunde på detta sätt provas samtidigt. Syftet med testet SE06 var att utgöra det tredje testet i en serie med tre vägkonstruktioner med successivt ökad bärighet. De två tidigare testerna är SE01 och SE02. I testet med olika bärlagermaterial, SE05, blev spårbildningen/spårtillväxten på ytan större på konstruktionen med krossat berg i bärlagret, speciellt i fuktigt tillstånd med grundvattenyta i undergrunden. Detta resultat var oväntat och mer än hälften av skillnaden i spårbildning kunde hänföras till skillnad i deformation av bärlagren. En huvudorsak till det oväntade resultatet anses vara otillräcklig packning av det krossade bergbärlagret trots att det uppfyllde normenliga krav. Resultaten från testerna SE01, SE02 och SE06 kommer att studeras mer i detalj vid kommande analyser. En preliminär slutsats är dock att det tycks råda ett relativt starkt samband mellan spårutvecklingen på respektive konstruktion och resultatet från provbelastning med fallvikt (ytdeflektioner).

Abstract [en]

During 2003 and 2004 two accelerated load tests were performed at the VTI test facility in Sweden (SE05 and SE06). The objective of SE05 was to investigate the deformation behaviour of two different unbound base materials. Half of the test area was constructed with a base layer of natural granular material and the other half with a base layer of crushed rock aggregate. This means that the two structures were tested simultaneously. The objective of SE06 was to be the third test in a series of structural design tests with stepwise higher bearing capacity. The previous two tests in this series are SE01 and SE02. In the unbound base material test, SE05, the surface rut depth propagation during the accelerated load testing was greater on the crushed rock aggregate structure especially in wet condition. This was not expected and more than half of the difference in surface rut depth was found in the difference in the base layer deformations. One main reason for this unexpected behaviour is believed to be unsatisfactory compaction of the crushed rock aggregate. The performance of the pavement structures SE01, SE02 and SE06 during the accelerated load testing will be analysed in more detail in the future. One preliminary conclusion is that there seems to be a fairly strong correlation between the rut depth propagation in dry condition and surface deflections from falling weight deflectometer (FWD) measurement on these three structures with gradually increasing bearing capacity.

Place, publisher, year, edition, pages
Linköping: VTI , 2006. , 46 p.
Series
VTI rapport, ISSN 0347-6030 ; 554A
Keyword [en]
Unbound base, Accelerated, Test, Deformation, Deflection, Bearing capacity, Rutting (wheel)
Keyword [sv]
Obundet bärlager, Accelererad, Test, Deformation, Deflektion, Bärförmåga, Spårbildning
Research subject
Road: Highway design, Road: Pavement design
Identifiers
URN: urn:nbn:se:vti:diva-1834OAI: oai:DiVA.org:vti-1834DiVA: diva2:670625
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

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Wiman, Leif G
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