NDLI: Behaviour of crushed rock aggregates used in asphalt surface layer exposed to cold climate conditions

Content Provider	Springer Nature Link
Author	Pérez Fortes, Ana Patricia Anastasio, Sara Kuznetsova, Elena Danielsen, Svein Willy
Copyright Year	2016
Abstract	Geological factors (mineralogy, structure, degree of weathering), processing method (crushing, sieving, washing, storing) and user technology for a specific area of use (e.g. asphalt pavements) should be the selecting criteria for crushed rocks used in the construction industry. While the last two criteria have been widely studied, the geological origin of the material has been less considered. Mechanical properties, shape, gradation of the stone material and affinity with the binder are considered the main discriminating factors in road construction. Although those properties are extremely relevant to avoid or milden difficult challenges for pavement surface layers, a deeper knowledge of the geological properties of materials exploited could lead to a general improvement of the overall resistance and durability of the road surface, especially in extreme weathering conditions. The purpose of this work is to investigate the influence of the rock materials properties (mineralogy, texture and porosity expressed by water absorption coefficient) in asphalt pavements. Different samples of aggregates and asphalt mixtures used in Norwegian and Spanish roads were tested with the Cantabro test after conditioning in sodium chloride and freeze–thaw cycles. Mineralogy, grain size, grains bonding, orientation and porosity (expressed by water absorption coefficient) could be related to the mechanical resistance of the aggregates and asphalt mixture behaviour. Even if just a qualitative analysis, the petrographic analysis of the rocks appeared to be a relevant tool to estimate the quality and the long-term durability of aggregates and asphalt mixtures already during the design phase.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	21
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-10-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aggregates Quarry Mechanical properties Petrography Freeze–thaw cycles Roads Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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