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  • 1.
    Andersson-Sköld, Yvonne
    et al.
    Statens Geotekniska Institut.
    Andersson, Karin
    Chalmers Tekniska Högskola.
    Lind, Bo
    Statens Geotekniska Institut.
    Claesson, Anna (Nystrom)
    Chalmers Tekniska Högskola.
    Larsson, Lennart
    Statens Geotekniska Institut.
    Suer, Pascal
    Statens Geotekniska Institut.
    Jacobson, Torbjom
    Coal tar-containing asphalt: Resource or hazardous waste?2007In: Journal of Industrial Ecology, ISSN 1088-1980, E-ISSN 1530-9290, Vol. 11, no 4, p. 99-116Article in journal (Refereed)
    Abstract [en]

    Coal tar was used in Sweden for the production of asphalt and for the drenching of stabilization gravel until 1973. The tar has high concentrations of polycyclic aromatic hydrocarbons (PAH), some of which may be strongly carcinogenic. Approximately 20 million tonnes of tar-containing asphalt is present in the public roads in Sweden. Used asphalt from rebuilding can be classified as hazardous waste according to the Swedish Waste Act. The cost of treating the material removed as hazardous waste can be very high due to the large amount that has to be treated, and the total environmental benefit is unclear. The transport of used asphalt to landfill or combustion will affect other environmental targets. The present project, based on three case studies of road projects in Sweden, evaluates the consequences of four scenarios for handling the material: reuse, landfill, biological treatment, and incineration. The results show that reuse of the coal tar-containing materials in new road construction is the most favorable alternative in terms of cost, material use, land use, energy consumption, and air emissions.

  • 2. Arm, Maria
    et al.
    Suer, Pascal
    Arvidsson, Håkan
    Swedish National Road and Transport Research Institute.
    Lindqvist, Jan-Erik
    Frogner-Kockum, Paul
    Larsson, Lennart
    Toomväli, Cecilia
    Förutsägelse av långtidsegenskaper hos restprodukter: teknik och miljö i vägar2009Report (Other academic)
    Abstract [en]

    In Sweden, use of industrial by-products is still hindered by concern for their long-term properties. This report describes a three-year research project aiming to identify the key processes of ageing related to the usefulness of by-products in roads; investigate the consequences of these processes for technical and environmental properties of the by-products, and propose a method for accelerated ageing to predict long-term properties. The project has compared naturally aged samples of two by-products used as sub-bases in existing asphalt paved roads with samples of fresh by-products from producers' piles. Steel slag of electric arc furnace type and municipal solid waste incinerator (MSWI) bottom ash were chosen. The samples were thoroughly characterized in order to identify which ageing processes had been crucial. The working hypothesis was that ageing processes lead to changes in pH, effective particle size and mineralogy, which in turn determine leaching, stiffness and stability of the material. One of the conclusions from the project is that the test results confirmed that the pavement edge material is ageing faster than the road centre material is.

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  • 3.
    Arvidsson, Håkan
    et al.
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Hellman, Fredrik
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Jämförelse mellan mekaniska egenskaper och nedbrytning av hjullast: del 22015Report (Other academic)
    Abstract [en]

    To study the correlation between the degradation of unbound base layer and mechanical properties (primarily Los Angeles test but also micro Deval test) a number of materials has been exposed by wheel load of VTI’s Heavy Vehicle Simulator (HVS). The first round was performed during the winter 2010–2011 and the second round during the following winter. In each round there were five materials tested. In the second round there were four new materials and one “old” as reference material. In this report results from round II will be presented, as well as some common results from both of the rounds, I and II. The results from round 1 are presented in VTI notat 4-2011. (Håkan Arvidsson: Comparison between the Los Angeles value and degradation from traffic load).The degradation has been defined as the difference in grain size distribution before and after HVS test. The degradation can be described in several ways. One way is as the difference in the area under the grain size distribution curve, another way is to sum the difference in percentage passing for all sieves or a few, e.g. the increase of fines by using results from the sieves 0.063–0.125 mm. The rutting has been measured by laser. The rutting is inversed proportional to the increase of fines. The increase of fines probably increases the stability in this quite coarse base layer grading. The materials with less increasing of fines have most of the hard minerals (quarts and plagioclase). The conclusion of these two tests on unbound base layer materials is that you partly can explain the degradation (change of grain size distribution) with mechanical properties (like Los Angeles and micro Deval). The correlations confirm this explanation and depend partly on an extreme material. Hellman et al (2013) show that degradation and crushing of the aggregates during compaction have a correlation with mechanical properties by studying microstructure and degree of crushing in microscope. Therefor the conclusion is that there is a degradation and crushing of aggregates in unbound base layer materials exposed by compaction and heavy traffic load.

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  • 4.
    Asp, Kenneth
    Swedish National Road and Transport Research Institute.
    Transportforum 2001: sammanställning av konferensföredrag vid forskardagarna i Linköping 10-11 januari 20012001Conference proceedings (editor) (Other academic)
  • 5.
    Asp, Kenneth
    Swedish National Road and Transport Research Institute.
    Transportforum 2002: sammanställning av konferensföredrag vid forskardagarna i Linköping 9-10 januari 20022002Conference proceedings (editor) (Other academic)
  • 6.
    Asp, Kenneth
    Swedish National Road and Transport Research Institute.
    VTI:s och KFB:s forskardagar: del 6. Rapportsammanställning av föredrag vid forskardagarna i Linköping 1999-01-13--14 beträffande: aktuell geoteknisk FoU inom infrastrukturen - fordonssäkerhet - väginformatik - avståndshållning i landsvägstrafik - geoteknisk riskvärdering - vad hände i Vagnhärad? - funktionshindrade och tafik1999Conference proceedings (editor) (Other academic)
  • 7.
    Carlsson, Håkan
    Swedish National Road and Transport Research Institute.
    Vägavsnitt med hyttsten och hyttsand: inventering genom provbelastning2008Report (Other academic)
    Abstract [sv]

    Under många år har hyttsten och hyttsand använts som fullgoda alternativa byggnadsmaterial i vägar som bär- och förstärkningslager, eller som lättfyllning i underbyggnad. Egenskaperna för de här materialen har tidigare undersökts i laboratorier och i begränsad omfattning i fält och då uppvisat goda resultat. Syftet med det här projektet är i första hand att genom provbelastning med FWD på ett flertal vägobjekt i Sörmland, som har uppbyggnader med lager som består av hyttsten eller hyttsand, undersöka materialens egenskaper och funktion i vägen. Detta kan sedan ligga till grund för dimensioneringen av vägar med lager av hyttsten och hyttsand. För undersökningen valdes fem vägavsnitt ut samt ett avsnitt på en gång- och cykelbana, samtliga belägna i Sörmland. De utvalda avsnitten har hyttsten eller hyttsand i konstruktionen. I notatet redovisas även resultat från tidigare undersökningar som gjorts på Rv 52:01 Katrineholm och som är väldokumenterade. För att jämföra de olika sträckorna är det önskvärt att kunna beräkna de olika lagrens styvhet (E-modul). Då uppgifter om lagertjocklekar saknades på flertalet av sträckorna är det inte möjligt att beräkna styvheten, varför andra beräknade mått får användas. De beräknade bärighetsmått som används i jämförelsen är "Uppskattad undergrundsmodul" och "Uppskattad beläggningstöjning" enligt Vägverkets metodbeskrivning 114:2000.

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  • 8.
    Colldin, Ylva
    Swedish National Road and Transport Research Institute.
    En laboratoriestudie av uppvärmningens betydelse för termoplastmassors slitageegenskaper1987Report (Other academic)
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  • 9.
    Djärf, Lennart
    Swedish National Road and Transport Research Institute.
    Asfalttöjningskriterium baserat på fältstudier1994Report (Other academic)
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  • 10.
    Erlingsson, Sigurdur
    et al.
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Ahmed, Abubeker
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    The Svappavaara road test sections: field coring and laboratory tests2015Report (Other academic)
    Abstract [en]

    This report describes laboratory testing of specimens taken from four new instrumented test road sections that have been built on E45 close to the Svappavaara municipality in Norrbotten County in Northern Sweden. The structures are located about 100 km north of the Arctic Circle in a climate that is characterized by long cold winters and short mild summers. The four test sections were built in a conventional manner. Each structure is about 200–250-metre-long with a central 100-metre-long part defined as the actual test section. All structures are in total 60 centimetres in thickness resting on top of a 70-centimetre-thick old existing road. The bitumen bound part of all the four structures consists of four layers; a thin surface course layer, two binder layers and a road base layer. All structures have the same wearing course, TSK 16 with a standard 160/220 penetration grade bitumen. The main difference between the structures lies in the binder as well as the two road base layers. As a part of the monitoring programme drilled asphalt specimens were taken in 2013 from the road structure and tested at VTI's material testing laboratory in Linköping. Furthermore, samples were taken from the unbound base course and tested. This report presents the test results for asphalt bound layers as well as for the unbound base course. For the bound layers the testing procedure included volumetric properties, stiffness modulus and fatigue tests for the different types of conventional and polymer modified asphalt mixtures. The tests were conducted in accordance with the Swedish or the equivalent European standards. For the unbound base course fundamental properties were estimated as well as stiffness and permanent deformation properties for different moisture contents.

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  • 11.
    Goubert, Luc
    et al.
    Belgian Road Research Centre (BRRC).
    Lundkvist, Sven-Olof
    Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.
    Report of the first round robin test for mobile reflectometers: research carried out in the frame of the activities of CEN/TC 226/WG22011Report (Other academic)
    Abstract [en]

    Mobile reflectometers for measurement of road marking retroreflectivity have been commercially available since the late 1990’s. It has been speculated that measurement errors are larger for these mobile instruments than for the traditional hand-held reflectometers. In order to get basic data for a new standard, CEN/TC 226/WG2 asked the Expert Panel to investigate measurement accuracy of mobile reflectometers. This investigation was carried out in a round robin test, in which the three most commonly used instruments in Europe participated: Ecodyn 30, LTL-M and Zehntner ZDR 6020. Two instruments of type Ecodyn were tested and one of each of the other two instruments; thus four reflectometers participated in the test. These instruments were denoted No. 1–4.

    A test route of 19 edge lines and 2 lane lines was defined. All edge lines were continuous, plane or profiled, while the lane lines were plane, 3 metres long with a gap of 9 metres. At each test site a section of 200 metres was measured, twice with each instrument. As reference, a hand-held reflectometer of type LTL-2000 was used. At each test site, a number of 32–38 readings were taken with this instrument.

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  • 12.
    Gustafson, Kent
    Swedish National Road and Transport Research Institute.
    EPAM 2012: Malmö, Sweden, 5-–7 September: 4th European pavement and asset management conference2012Conference proceedings (editor) (Other academic)
    Abstract [en]

    The aim of the conference is to meet and discuss and get more knowledge of the challenges of road infrastructure asset management. The effects of increasing traffic, climate change and need of safety as well as the need of well-being has to be met by even more effective road management. A holistic approach covering a lifetime view of road keeping (e.g. LCA) and preserving the assets is essential. The challenge Europe is facing is to use environmental friendly materials and technologies providing a sustainable and safe road infrastructure system. The conference covers all aspects of the road infrastructure including assets such as pavements, engineering structures and road equipment.

  • 13.
    Gustafson, Kent
    Swedish National Road and Transport Research Institute.
    Inverkan av halkbekämningsmedel på betong: Fältförsök vid VTI1987Report (Other academic)
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  • 14.
    Hellman, Fredrik
    et al.
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Arm, Maria
    SGI.
    Återvinning av vägmaterial: ett europeiskt samarbetsprojekt2012In: Åter vinnare för industrin 2012, Stockholm: Rekord Media och Produktion AB , 2012, p. 68-74Chapter in book (Other academic)
  • 15.
    Hermansson, Åke
    Swedish National Road and Transport Research Institute.
    Test av VTI:s Prallutrustning med accelerometer2011Report (Other academic)
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  • 16.
    Hjalmarsson, Sven-Olof
    Swedish National Road and Transport Research Institute.
    Prov med Merolitbärlager på väg 195, Bankeryd -81: Lägesrapport 19851986Report (Other academic)
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  • 17.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Artificial aggregates1987Report (Other academic)
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  • 18.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Beurteilungskriterien und Qualitätsanforderungen an Strassenbaugesteine: Ergebnisse einiger schwedischer Untersuchungen1975Report (Other academic)
  • 19.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Egenskaper hos bärlagergrus och makadam enligt laboratorieforskningar: En litteraturstudie1987Report (Other academic)
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  • 20.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Nedbrytning av bärlagergrus - en problemöversikt1987Report (Other academic)
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  • 21.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Nedbrytning av bärlagergrus: Diskussion av testmetoder, utvecklade vid VTI1987Report (Other academic)
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  • 22.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Nötningsegenskaper1987Report (Other academic)
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  • 23.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Nötningsegenskaper: Samband mellan laboratorie- och fältförsök1987Report (Other academic)
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  • 24.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Stabilisering och modifiering av överbyggnad hos svaga vägöverbyggnader genom infräsning av bindemedel: Val av bindemedel1987Report (Other academic)
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  • 25.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Stabilization of marginal aggregates with hydraulic and puzzolanic binders based on waste materials1987Report (Other academic)
    Abstract [en]

    Natural sand deposits and waste screenings from gravel pits and quarries are abundant in parts of Sweden. Investigations have been made to stabilize such materials with binders based on waste materials. Both laboratory work and test roads have been performed. In the latter case, mainly secondary roads have been strengthened with a plant-mixed bases. Good results have been achieved with a binder made of milled granulated blast furnace slag, activated with lime or especially with both lime and waste gypsum. Sand and screenings from gravel often contain organic material, deleterous with the binders studied. In such cases, the gypsum addition also seems to counteract the negative effect of the organic material. Fly ash has recently been available in Sweden. Tests made with fly ash-lime, as often used for stabilization abroad,have shown too slow binding for a rather cold climate. Addition of waste gypsum, calcium chloride, alkali-salts or use of an alkali-rich cement kiln dust instead of commercial lime can improve the binding properties. Different fly ashes, however, react in different ways. It is often more suitable to use fly ash-cement as a binder, especially with poorly graded aggregates. The fly ash, added in an optimum amount, work as a filler and high immediate stabilities can be achieved at a correct water content. The puzzolanic properties of the fly ash, at the same time, makes it possible to reduce the cement content considerably in comparison with the case when only portland cement is used as a binder. Promising laboratory work has also been done with binders consisting of condensed silica fume or ash from fluidized bed coal combustion, both in combination with lime.

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  • 26.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Undersökning av slitstyrkan hos brobanebetong, vägbetong, asfaltbetong och gjutasfalt enligt Trögerprovning1987Report (Other academic)
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  • 27.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    Upgrading of aggregates1987Report (Other academic)
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  • 28.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    VTI:s expertseminarium: beständiga asfaltbeläggningar den 3-4 februari 19981998Report (Other academic)
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  • 29.
    Höbeda, Peet
    Swedish National Road and Transport Research Institute.
    VTI:s expertseminarium: beständiga asfaltbeläggningar den 3-4 februari 1998: bilaga1998Report (Other academic)
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  • 30.
    Höbeda, Peet
    et al.
    Swedish National Road and Transport Research Institute.
    Chytla, Jerzy
    Swedish National Road and Transport Research Institute.
    Samband mellan Flakiness och Shape Index samt flisighetstal: resultat från VTI:s deltagande i europeisk M & T ringanalys1996Report (Other academic)
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  • 31.
    Höbeda, Peet
    et al.
    Swedish National Road and Transport Research Institute.
    Chytla, Jerzy
    Swedish National Road and Transport Research Institute.
    Undersökning av asfaltmassa HAB12T och HAB12Ö, framställd på laboratorium genom modifierad blandning (KGO III) och konventionell blandning1997Report (Other academic)
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  • 32.
    Höbeda, Peet
    et al.
    Swedish National Road and Transport Research Institute.
    Djärf, Lennart
    Swedish National Road and Transport Research Institute.
    Said, Safwat
    Swedish National Road and Transport Research Institute.
    Viman, Leif
    Swedish National Road and Transport Research Institute.
    Provningar av obundna material genom cykliska triaxialförsök och andra undersökningar1987Report (Other academic)
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  • 33.
    Höbeda, Peet
    et al.
    Swedish National Road and Transport Research Institute.
    Jacobson, Torbjörn
    Swedish National Road and Transport Research Institute.
    Viman, Leif
    Swedish National Road and Transport Research Institute.
    Egenskaper hos Merolit: En uppföljning av olika byggnadsprojekt fram till år 19841987Report (Other academic)
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  • 34.
    Höbeda, Peet
    et al.
    Swedish National Road and Transport Research Institute.
    Jacobson, Torbjörn
    Viman, Leif
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Erfarenheter med Wanderrostslagg från Händelöverken, Norrköping: laboratorieförsök och uppföljning av provsträckor1987Report (Other academic)
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  • 35.
    Höbeda, Peet
    et al.
    Swedish National Road and Transport Research Institute.
    Viman, Leif
    Swedish National Road and Transport Research Institute.
    Orienterande MTS-försök med makadam och bärlagergrus i liten styv provcylinder1987Report (Other academic)
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  • 36.
    Isacsson, Ulf
    Swedish National Road and Transport Research Institute.
    Komponentanalys av bitumen med HPLC-teknik - några inledande försök1987Report (Other academic)
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  • 37.
    Isacsson, Ulf
    Swedish National Road and Transport Research Institute.
    Kvalitetsuppföljning av bituminösa bindemedel: 1986 års prover. Lägesrapport1987Report (Other academic)
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  • 38.
    Isacsson, Ulf
    Swedish National Road and Transport Research Institute.
    Minnesanteckningar från rundresa i USA hösten 19841987Report (Other academic)
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  • 39.
    Isacsson, Ulf
    Swedish National Road and Transport Research Institute.
    Provsträckor med mjukbitumen vid Långträsk i BD-län 19851987Report (Other academic)
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  • 40.
    Isacsson, Ulf
    Swedish National Road and Transport Research Institute.
    Tillverkning av filler-bitumenblandningar enligt VTI:s metodik samt analys av blandningens mjukpunkt och/eller penetration1987Report (Other academic)
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  • 41.
    Isacsson, Ulf
    et al.
    Swedish National Road and Transport Research Institute.
    Bengtsson, Thomas
    Swedish National Road and Transport Research Institute.
    Provsträckor av mjuk asfaltbetong MA 1500-16 i BD-län 19841987Report (Other academic)
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  • 42.
    Jacobson, Torbjörn
    Swedish National Road and Transport Research Institute.
    Återvinning av schaktmassor från Stockholm: laboratorieprovning2001Report (Other academic)
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  • 43.
    Jacobson, Torbjörn
    et al.
    Swedish National Road and Transport Research Institute.
    Hornwall, Fredrik
    Swedish National Road and Transport Research Institute.
    Dubbavnötning på provplattor i Norge: slutrapport1998Report (Other academic)
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  • 44.
    Jacobson, Torbjörn
    et al.
    Swedish National Road and Transport Research Institute.
    Hornwall, Fredrik
    Swedish National Road and Transport Research Institute.
    Försök med polymermodifierade bindemedel i skelettasfalt och tät asfaltbetong: provvägsförsök E18/E20, Örebro-Arboga. Slutrapport 19991999Report (Other academic)
    Abstract [sv]

    Försöket inriktades på att undersöka om polymermodifierade bindemedel (PmB) kunde förbättra egenskaperna hos slitlager av tät asfaltbetong (ABT16) och skelettasfalt (stenrik asfaltbetong, ABS16). VTI:s uppgift var att dokumentera utförandet av provvägen, att följa upp vägen långsiktigt och att utvärdera försöket. Uppföljningarna omfattade perioden 1989 fram till sommaren 1999 då vägen lades över på grund av motorvägsarbeten. Uppföljningen har bland annat omfattat dubbslitage, spårbildning, jämnhet, textur, friktion samt undersökningar av beläggningsprov (massa och borrkärnor) och bindemedel.

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  • 45.
    Jacobson, Torbjörn
    et al.
    Swedish National Road and Transport Research Institute.
    Nilsson, Fredrik
    Swedish National Road and Transport Research Institute.
    Dubbavnötning på provplattor i Norge vintrarna 1994/95, 1995/96 och 1996/97: lägesrapport1997Report (Other academic)
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  • 46.
    Karlsson, Emelie
    et al.
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Viman, Leif
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Ringanalys bitumen: viskositet2015Report (Other academic)
    Abstract [en]

    A round robin was carried out by seven different laboratories in Sweden for four different types of bituminous binders, two harder bitumen and two soft bitumen. The purpose of the round robin test was to compare the viscosity methods using capillaries against the new variant with a rotating spindle viscometer. Apart from these methods the aging characteristics was also tested but later not evaluated. Much data were collected from different variations on these analyzes and the focus has been on evaluating data from EN 13302, EN 12595 and EN 12596, which was the main purpose of the round robin. The evaluation has focused on the reproducibility for the various methods compared with the precision in the different standards. The variation in the result for the method SS-EN 13302 was generally lower in this round robin test compared to the precision in the standard while the variation for the SS-EN 12595 and SS-EN 12596 generally was higher.

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  • 47.
    Kuttah, Dina K
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Cold recycling of asphalt at a central plant: follow up of test roads in Halland, Södermanland and Gävleborg counties2014Report (Other academic)
    Abstract [en]

    Cold recycling of asphalt is a resource-saving technology because the materials do not need to be warmed up. Moreover, by using this technique, up to 100 per cent reclaimed asphalt concrete (RA) could be recycled. However, in order to achieve good results, the old RA should be processed in a proper manner. The report presents results of tests carried out on road N-714, part Vessigebro–Ätrafors and road N 530, part Såghuset–Skönhult in Halland in addition to road D-976, Strängnäs and road D-957, Vansö in Södermanland. Moreover, this report presents results of tests performed on road X-583, part Ljusne–Sandarne in Gävleborg. The mechanical properties have been investigated by indirect tensile strength and stiffness modulus for RA mixtures and drill cores. The tests results showed that part of the damage that may be encountered when using cold recycled asphalt coatings can be in the form of loss of surface materials, mechanical damage due to relatively soft road surfaces and unevenness of the road surface.

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  • 48.
    Kuttah, Dina K
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    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
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    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Hakim, Hassan
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Effect of Aggregate Composition and Freeze-Thaw Cycles on the Stiffness Modulus of Asphalt Concrete Mix2013Conference paper (Refereed)
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    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
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    fulltext
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