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Utförandets inverkan på hållbarhet för beläggningslager
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0002-6308-7487
Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.ORCID iD: 0000-0002-9893-0067
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0002-5871-7587
Swedish National Road and Transport Research Institute, Infrastructure, Measurement technology and engineering workshop.
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2019 (Swedish)Report (Other academic)Alternative title
The impact of quality of work execution on asphalt concrete durability (English)
Abstract [sv]

Utförandet av en vägbeläggning har stor betydelse för hållbarheten. Separation i massabeläggningar leder till kortare livslängd på asfaltbeläggningar och för tidigt uppkomna skador har ofta ett direkt samband med hur väl utfört beläggningsarbetet är. Svårigheten med separationsproblemet ligger i att det saknas lätthanterliga och objektiva praktiska metoder för bestämning av separationsgrad och dess effekt på hållbarheten. Under senare år har vägytemätbilar använts för mätning av makrotextur med måttet MPD (Mean Profile Depth). Korrelationen mellan MPD-värden och styvhetsmodul antyder att MPD-mätvärden skulle kunna vara en praktisk och snabb metod för utvärdering av kvaliteten hos utfört arbete. Ett begränsat antal fallviktsmätningar utfördes på positioner med olika separationsgrad i AG-lagret (Asfaltbundet Grus). Det konstaterades en tendens till inverkan av separation i AG-lagret på fallviktsdata även om det fanns en variation i data. I denna studie presenteras ett tillvägagångssätt för detektering av ytor med hög makrostruktur. Fast MPD-värden bara beskriver ytans textur, kan det användas för en snabb skanning av separerade ytor i det översta beläggningslagret. Begränsad och riktad provtagning kan därefter utvärderas för mer exakt bestämning av separationsgrad och dess effekt på livslängden/ hållbarheten.

Abstract [en]

Non-destructive testing in quantifying the asphalt pavement layers homogeneity can be used for the quality assurance in paving contracts. This paper summarizes the findings from a field study on segregation in bituminous pavement mixes that relates pavement layer surface texture to the homogeneity of the paved bituminous layer by distinguishing mix segregated area. The mean profile depth (MPD) values of paved layer were measured. Based on these values three locations on the road were identified having low, intermediate and high MPD values. Thereafter, cored samples were tested for stiffness modulus before and after moisture conditioning by performing the moisture induced sensitivity test (MIST). Results clearly showed that the samples from the locations with high MPD values were mostly affected by the moisture conditioning for which the stiffness moduli were significantly reduced. The samples with high MPD values had the highest air voids as well. Thus, this study demonstrated that construction quality described by segregation in the paved asphalt mix has a significant impact on the moisture sensitive performance of pavements. A limited number of falling weight deflectometer (FWD) measurements were performed at positions with different degree of separation in the road base layer. There was a tendency for the effect of separation in the road base layer on FWD even though there was a variation in data. The strong correlation between the MPD values and change in stiffness modulus also suggests that the measurements of the MPD values can be a reliable and non-destructive method for evaluating the construction quality of a pavement and in developing the quality assurance criteria based on pavement performance that can be used in paving contracts.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2019. , p. 27
Series
VTI rapport, ISSN 0347-6030 ; 998
Keywords [en]
Surfacing, Bituminous mixture, Segregation (mater), Lifetime, Durability, Surface texture, Falling weight deflectometer, Performance
National Category
Infrastructure Engineering
Research subject
30 Road: Highway design, 33 Road: Surfacing; 30 Road: Highway design, 33 Road: Surfacing
Identifiers
URN: urn:nbn:se:vti:diva-13701OAI: oai:DiVA.org:vti-13701DiVA, id: diva2:1299826
Available from: 2019-03-28 Created: 2019-03-28 Last updated: 2019-06-11Bibliographically approved

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File name FULLTEXT01.pdfFile size 1721 kBChecksum SHA-512
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Authority records BETA

Said, Safwat F.Lundberg, ThomasRahman, ShafiqurCarlsson, HåkanMcGarvey, TerenceAhmed, Abubeker

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Said, Safwat F.Lundberg, ThomasRahman, ShafiqurCarlsson, HåkanMcGarvey, TerenceAhmed, Abubeker
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