Composition of abraded dust from asphalt pavement produced using ferrochromium smelter slag (OKTO-aggregate)

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Makowska, Michalina Leveinen, Jussi Pellinen, Terhi Marjamaa, Riikka 2015-02-25T10:00:30Z 2015-02-25T10:00:30Z 2015
dc.identifier.isbn 978-952-60-6104-7 (electronic)
dc.identifier.issn 1799-490X (electronic)
dc.identifier.issn 1799-4896 (ISSN-L)
dc.description.abstract This report describes an investigation that took place at Aalto University commissioned by the Finnish Transport Agency about asphalt dust containing OKTO-aggregate. In the fall of 2013, Finnish newspaper headlines began to raise the issue of the occurrence of damaged timing belts in the Oulu region. It seemed to only concern certain models and was found in the form of a dust. The press reasoned that this "mysterious" dust must have originated from the aggregates abraded from the local Oulu roads. More specifically, it was attributed to the OKTO-aggregate used in surface wearing course mixtures on high traffic volume roads. The OKTO-aggregate (OKTO-murske in Finnish) is a brand name for the man-made byproduct of the smelter slag from the Outokumpu Tornio ferrochromium plant. Natural rock aggregates are substituted by this material in high volume roads due to its excellent abrasion resistance against studded tire wear. The conclusion is that the possible contribution of OKTO-aggregate to the mechanical breakage or abrasion of car parts was considered insignificant compared with the other fragments, such as corundum, that were also detected in the car dust. Furthermore, OKTO-aggregate was found to be much less reactive with deicing salts than the rock aggregate used in the Oulu region. Therefore, the OKTO-aggregate does not significantly contribute to the chemical corrosion of car parts. en
dc.format.extent 46 + app. 9
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series SCIENCE + TECHNOLOGY en
dc.relation.ispartofseries 1/2015
dc.subject.other Civil engineering en
dc.title Composition of abraded dust from asphalt pavement produced using ferrochromium smelter slag (OKTO-aggregate) en
dc.type D4 Julkaistu kehittämis- tai tutkimusraportti tai -selvitys fi Insinööritieteiden korkeakoulu fi School of Engineering en
dc.contributor.department Yhdyskunta- ja ympäristötekniikan laitos fi
dc.contributor.department Department of Civil and Environmental Engineering en
dc.subject.keyword asphalt en
dc.subject.keyword ferrochromium en
dc.subject.keyword smelter slag en
dc.subject.keyword OKTO-aggregate en
dc.subject.keyword road dust en
dc.subject.keyword timing belt damages en
dc.subject.keyword SEM-ESD en
dc.identifier.urn URN:ISBN:978-952-60-6104-7
dc.type.dcmitype text en
dc.contributor.lab Highway Engineering en

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