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On the viscosity of asphalt mastics
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. , vii, 17 p.
Series
Trita-TSC-LIC, ISSN 1653-445X ; 13-010
Keyword [en]
Asphalt mastics, viscosity, Filller, Filler properties, workability
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-138600ISBN: 978-91-87353-24-6 (print)OAI: oai:DiVA.org:kth-138600DiVA: diva2:681515
Presentation
2013-12-19, B25, KTH, Brinellvägen 23, Stockholm, 12:00
Opponent
Supervisors
Note

QC 20131220

Available from: 2013-12-20 Created: 2013-12-20Bibliographically approved
List of papers
1. An empirical framework for determining asphalt mastic viscosity as a function of mineral filler concentration
Open this publication in new window or tab >>An empirical framework for determining asphalt mastic viscosity as a function of mineral filler concentration
2012 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 35, 23-29 p.Article in journal (Refereed) Published
Abstract [en]

Sufficient coating, easy paving and good compaction are desirable parameters, which are approachable with the optimum viscosity of the mastic. In many studies, models have been developed for calculating the viscosity for different types of suspensions at various particle-to-fluid ratios. Unfortunately, none of them are applicable to asphalt mastics, since this material has a much wider range of mineral filler concentration from dilute to very concentrate. To give an overview of the existing viscosity models and to evaluate their range of applicability to asphalt mastics, an extensive literature review was performed. A new empirical framework was developed that removes some of the stipulated limitations of the existing theories.

Keyword
Asphalt mastic, Asphalt mixture, Filler concentration, Suspension, Viscosity
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:kth:diva-84101 (URN)10.1016/j.conbuildmat.2012.02.093 (DOI)000309493700004 ()2-s2.0-84865532590 (Scopus ID)
Note

QC 20121015. Updated from accepted to published.

Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2017-12-07Bibliographically approved
2. Evaluation of Environmental Susceptibility of Bituminous Mastic Viscosity as a Function of Mineral and Biomass Fillers:
Open this publication in new window or tab >>Evaluation of Environmental Susceptibility of Bituminous Mastic Viscosity as a Function of Mineral and Biomass Fillers:
2013 (English)In: Transportation Research Record, ISSN 0361-1981, E-ISSN 2169-4052, no 2371, 23-31 p.Article in journal (Refereed) Published
Abstract [en]

Bituminous mastics influence many other important asphalt mixture properties in addition to their own allowance for the load transfer in the aggregate skeleton. The influence of bituminous mastics extents to the overall stability of a mixture, air void distribution, bitumen draindown during transport, a mixture's workability during the laying process, and the overall in-time performance of the pavement. To understand the properties of asphalt mixtures and their resistance to environmentally induced failure mechanisms, it is paramount to study not only bitumen and the asphalt mixture but also the mastic itself. Current asphalt design procedures do not take mastic behavior into account, however; this omission leads to a significant flaw in the ability to design and predict asphalt concrete response. This paper presents the results of an ongoing research project to enhance the understanding of the mastic phase as well as to develop a new test protocol to characterize mastics. A description is given of the measurements of mastic viscosity for different types of mastics in which the bitumen source is kept as a constant but with varying fillers as well as concentrations. Environmental susceptibility was investigated by subjecting the samples to aging and moisture conditioning. Biomass fillers were included in some of the mastics, in addition to some of the traditional fillers, to show their impact on the viscosity under varying conditions. Results showed that the developed test protocol was able to identify clearly the impact of filler properties on the mastic viscosity. A critical filler concentration was identified beyond which the viscosity behavior became nonlinear. The results also showed that moisture and aging had significant effects on the viscosity of mastics.

Keyword
Aggregate skeletons, Critical filler concentration, Failure mechanism, Filler properties, Mixture properties, Moisture conditioning, Overall stabilities, Viscosity behavior
National Category
Other Civil Engineering
Identifiers
urn:nbn:se:kth:diva-107716 (URN)10.3141/2371-03 (DOI)000329411200004 ()2-s2.0-84890103165 (Scopus ID)
Note

QC 20140130. Updated from accepted to published.

Available from: 2012-12-17 Created: 2012-12-17 Last updated: 2017-12-06Bibliographically approved

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