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Texture influence on road dust load
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment. KTH.ORCID iD: 0000-0002-0138-0768
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0002-0124-04802
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0001-6600-3122
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0002-2679-2611
2017 (English)In: Proceedings of the 22nd International Transportation and Air Pollution Conferens, 2017, p. 14-Conference paper, Published paper (Refereed)
Abstract [en]

The objective of this study was to investigate the connection between pavement texture and the maximum dust load retention at a low speed. One of the main sources of PM (Particulate Matter) in the urban environment is the traffic. Traffic contributes not only to exhaust emissions, but also to direct emission from abrasion wear of pavements, tyres and brakes as well as emission from suspension of available road dust on the road surface. This dust is partially stored in the road surface macro texture. Dust accumulate on the surface due to several different mechanisms and transport phenomena’s. Examples of transport mechanisms affecting the road dust load and thus the storage in the texture include precipitation, evaporation, turbulence from traffic, wetting of the road surface binding particles to it, sanding and crushing of the sand etc.

Place, publisher, year, edition, pages
2017. p. 14-
Keywords [en]
Surface texture, Particulate matter, Dust, Macrotexture
National Category
Infrastructure Engineering
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment; 30 Road: Highway design, 33 Road: Surfacing
Identifiers
URN: urn:nbn:se:vti:diva-12783ISBN: 9783905594676 (electronic)OAI: oai:DiVA.org:vti-12783DiVA, id: diva2:1181652
Conference
TAP - Transportation and Air Pollution
Available from: 2018-02-09 Created: 2018-02-09 Last updated: 2018-05-17Bibliographically approved
In thesis
1. Non-Exhaust PM10 and Road Dust
Open this publication in new window or tab >>Non-Exhaust PM10 and Road Dust
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Non-exhaust PM10 is an issue in the urban environment linked to health issues. Emissions of non-exhaust PM10 is relatable to pavement properties. Also of importance is resuspension of road dust stored from surfaces. This depends on the traffic and metrological conditions. Given this, the purpose of the thesis was to give an overview limited to Sweden and the Nordic countries regarding non-exhaust PM10 emissions and road dust.

The overview includes how particles are related to human health. Also included is the principle of how particles are emitted from road surface and tyre interaction, both directly and through resuspension of road dust. This thesis also includes an overview of how the use of studded tyres impact on asphalt surfacings and how the properties of the materials used impact on the abrasion wear. This is then linked to the emissions of non-exhaust particles. Further described is how measurements can be done of ambient particles and road dust, followed on two major models for road abrasion wear and non-exhaust PM prediction. Also included is how road operation, e.g. traction sanding and dust binding, influence the particle emissions together with other options to reduce the emissions through, e.g. limiting the use of studded tyres.

One special issue discussed in this thesis is the lack of holistic view regarding the environmental problems in the urban environment with focus on particle emissions and road noise emissions, both from the road surface and tyre interaction. Currently the most problematic issue is prioritized and the resulting solution to that specific problem might increase other problems.

This thesis shows that much knowledge is available regarding non-exhaust PM10 emissions and road dust, but also that several knowledge gaps exists. Several suggestions on further studies is given together with a brief overview on the continued work forward from this thesis.

Abstract [sv]

Icke-avgasemissioner av PM10 är ett problem i urbana miljöer länkat till flera hälsoaspekter. Dessa emissioner kan relateras till beläggningars egenskaper. Även resuspension av vägdamm från ytor är av betydelse och beror på både trafiken och meterologin. Baserat på detta är syftet med denna avhandling att ge en översikt kring icke-avgas PM10 emissioner och vägdamm, begränsat till Sverige och de övriga nordiska länderna.

Denna översikt inkluderar hur partiklar relaterar till människans hälsa. Annat som inkluderas är hur partiklarna emitteras från vägyta-däckinteraktionen, både direkt och genom resuspension av vägdamm. Avhandlingen inkluderar även en översikt kring hur användandet av dubbdäck inverkar på vägbeläggningar och hur dess egenskaper inverkar på nötningsslitage. Detta länkas därefter till partikelemissioner. Vidare beskrivs även hur mätningar kan genomföras av partiklar samt vägdamm vilket följs upp av beskrivningar kring två större modeller kring prediktion av nötningsslitage och prediktion av icke-avgasemissioner. Även hur driftåtgärder inverkar på emissionerna tillsammans med alternativ för att minska emissionerna tas upp.

Ett särskilt problem som tas upp i avhandlingen är bristen på helhetssyn beträffande miljöproblem i den urbana miljön med fokus på partikel- och bulleremissioner från vägyta-däckinteraktionen. För närvarande brukar det värsta problemet prioriteras och lösningen till det detta problem kan i sin tur medföra att andra miljöproblem istället förvärras.

Denna avhandling visar på att mycket kunskap existerar kring icke-avgasemissioner av PM10 och kring vägdamm, men även att flertalet kunskapsluckor existerar. Flertalet förslag på vidare studier ges tillsammans med en överblick kring det fortsatta arbetet.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2018. p. 129
Series
TRITA-ABE-DLT-1802003
Keywords
Dust, Inhalable particle, Pavement, Tyre, Wear, Abrasion, Health
National Category
Civil Engineering
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment
Identifiers
urn:nbn:se:vti:diva-12781 (URN)978-91-7729-689-8 (ISBN)
Presentation
2018-03-01, F3, Lindstedtsvägen 26, Stockholm, 10:00 (English)
Opponent
Supervisors
Available from: 2018-02-09 Created: 2018-02-09 Last updated: 2018-05-17

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