Publisher’s version / Version de l'éditeur:
Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la
première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n’arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.
Questions? Contact the NRC Publications Archive team at
PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information.
https://publications-cnrc.canada.ca/fra/droits
L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB.
Building Science Insight 2006: Sustainable Infrastructure [Proceedings], pp. 1-32, 2007-05-10
READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.
https://nrc-publications.canada.ca/eng/copyright
NRC Publications Archive Record / Notice des Archives des publications du CNRC :
https://nrc-publications.canada.ca/eng/view/object/?id=d393a8ad-78bb-4097-aed5-a7392c4376ad https://publications-cnrc.canada.ca/fra/voir/objet/?id=d393a8ad-78bb-4097-aed5-a7392c4376ad
NRC Publications Archive
Archives des publications du CNRC
This publication could be one of several versions: author’s original, accepted manuscript or the publisher’s version. / La version de cette publication peut être l’une des suivantes : la version prépublication de l’auteur, la version acceptée du manuscrit ou la version de l’éditeur.
Access and use of this website and the material on it are subject to the Terms and Conditions set forth at
Pavement management: InfraGuide's best practices on pavement maintenance and pavement research at NRC
Pavement Management: InfraGuide’s Best
Practices on Pavement Maintenance and
Pavement Research at NRC
Presentation Outline
• InfraGuide overview
• Preventive maintenance
• Best practice on crack sealing and filling for asphalt pavements
• Research update on fillers at NRC-IRC • Summary and status of InfraGuide
Responding to
T
Best Practice Development
Stakeholder & peer comment invited
Working Group formed Environmental scan, solicit & evaluate topics
Distribution & Website publishing
E-Learning Tools
• Managing infrastructure assets
• Developing a water distribution system renewal plan
• An integrated approach to assessment and evaluation of municipal road, sewer and water networks
Roads Best Practices
• Timely preventive maintenance
• Construction of utility boxes in pavements
• Restoration and repair of utility boxes in pavements
• Guidelines for sealing and filling cracks in asphalt pavements
• Rut mitigation techniques for intersections
• Priority planning and budgeting process for pavement maintenance
and rehabilitation
• Road drainage, design alternatives and maintenance
• Sidewalk design, construction and maintenance
• Preservation of bituminous pavements using thin-surface restoration
techniques
• Dust control for unpaved roads
Timely Preventive Maintenance
What is preventive maintenance? • “…the planned strategy of
cost-effective treatments to an
existing roadway system and
its appurtenances that preserves the system, retards future
deterioration, and maintains or improves the functional
conditions of the system (without increasing structural capacity)”
Pavement Management
System
Components of a Preventive
Maintenance Program
• The right pavement • The right time
Possible Treatments
• Machine patching
• Sealing of cracks or joints • Slurry seal
• Slab stitching • Micro-surfacing • Surface treatment • Thin hot mix overlay
Summary
• Importance of the preventive pavement maintenance
• Slowing the rate of deterioration = increase useful life of pavement
• Preventive maintenance is cost-effective • Applicable on flexible and rigid pavements
• Cost-effective preventive maintenance = right treatment to the right pavement at the right time
• Importance of life cycle cost analysis • Timing
Crack Sealing and Filling
• Preventive maintenance
– extend service life
– maximize use of funds
Crack Treatments
• Crack sealing = Routing and sealing • Crack filling = Sealing without routing
Crack Sealing
• Used on active cracks
– open in winter – close in summer – typically ≥ 3mm in summer
– rout width to depth ratio ≥ 1
Thermal
Contraction/expansion
Seasonal Factors
F il l F il l F il lCrack Filling
• Cracks show no movement over time
– no routing – cleaning
– filled with hot sealant (overband) – or filled with cold emulsion (flush)
• Highways
– longitudinal = filled – transverse = sealed
Technical
• Routing and rout geometry
• Good performance: 30 by 15, 25 by 12 and 12 by 12 [W (mm) x D (mm)]
Pavement Selection
• Crack sealing is preventive maintenance applicable to
pavements with:
a) sufficient structural strength to meet current needs and those in the foreseeable future
Management Issues
• Training
– most workers are unfamiliar with equipment and the importance of doing it right
– traffic control and worker safety
• Technical
– rout geometry & routing – cleaning & hot air lance – application
Sealant Application
• Sealants degrade with heat – use low setting • Start your day with an empty melter
Quality Control Check List
• Climatic conditions • Routing • Material preparation • Cleaning • Sealant application• Overbanding (if applicable) • Sealant protection
Research Update
• Sealants fail prematurely
– 2 to 7 years
• We need 8 to 13 years • Better specs are needed
– installation – materials
Solution # 2
New Sealant Specs
• Performance specification
– based on fundamental material science – account for aging
– local conditions
• temperature • aggregate
– availability: < 1 year
NRC Addresses Your Needs
• Your most pressing needs?
– crack re-sealing – better pothole fixes – pavement markings – chip seals
NRC and InfraGuide
Continue to Deliver
• Increasingly accepted by municipalities throughout Canada as subject authority
• Up to date information and methodologies for infrastructure management
• Involvement of the consulting engineering community in Canada
• Involvement of Canadian industry leaders in subject matter • Involvement of practitioners and stakeholders
