See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/331471758 Sustainable Pavement Maintenance and Microsurfacing presentation TRB 2010 Presentation · January 2012 CITATIONS READS 0 36 2 authors: Douglas D. Gransberg Susan Tighe Gransberg & Associates Inc. University of Waterloo 393 PUBLICATIONS 1,877 CITATIONS 369 PUBLICATIONS 2,234 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: AASHTO Partnering Handbook, Second Edition View project Long Term Pavement Performance Program View project All content following this page was uploaded by Douglas D. Gransberg on 02 March 2019. The user has requested enhancement of the downloaded file.
Douglas D Gransberg, PhD, PE Iowa State University & Susan Tighe, PhD, PEng University of Waterloo
Project selection is the most important step in the microsurfacing design process. ◦ Don’t use on structurally deficient pavement ◦ Best used for rutting, oxidation, loss of friction. The majority of the respondents require the contractor to develop the job mix formula (i.e. the mix design) Most said qualified competition was inadequate: ◦ Most did not advertise a consistent amount of work ◦ Most did not prequalify micro contractors
Evaluate the differences in microsurfacing costs and performance in the eight US states that require a warranty versus a similar number and geographical distribution of those that do not. Investigate and quantify the environmental benefits of microsurfacing and provide hard, factual justification for picking micro over a lower priced option if all other technical considerations were equal.
There are no rigorous field tests based on a rational quantification of measurable microsurfacing properties ◦ develop a suite of field tests that allow an inspector to test the microsurfacing mix after it has been laid ◦ tests to identify when the mix has cured to a sufficient degree to open it to traffic without fear of damaging it.
Environmental sustainability research that is related specifically to post-construction operations is an emerging field. Quantification of sustainability with pavement preservation and maintenance programs is not commonly practiced in the US and Canada. An assessment tool to quantify sustainability in the pavement preservation and maintenance context is both missing and required.
The case studies showed sustainability can be incorporated into pavement preservation and maintenance practices. Environmental sustainability metrics should be developed and integrated into pavement preservation and maintenance treatment programming.
Develop fundamental data on the relative environmental sustainability of common pavement preservation and maintenance treatments. Develop pavement preservation and maintenance-specific life cycle assessment and cost analysis method that includes values for: ◦ Carbon sequestration, resource renewability, and other salient elements of sustainability ◦ Furnish a rational approach to treatment selection.
Develop training and information that quantifies the importance of preservation and maintenance treatments in the sustainability impact factor areas. Research to adapt recycled and alternate materials for use in pavement preservation and maintenance treatments. Research to develop appropriate noise standards for pavement preservation and maintenance and life cycle assessment.
Quantify the contribution that crack sealing makes to the sustainability of all types of pavement surfaces to demonstrate its importance in sustainable pavement preservation and maintenance.
View publication stats View publication stats “Best practices” cannot be developed by syntheses…. TRB policy Most valuable contribution is to identify the gaps in the body of knowledge that require future research to fill. Pavement preservation and maintenance research needs to stimulate a focus beyond design and construction. Lack of real field performance data on pavement preservation and maintenance treatments is scary.
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