United States Department of Transportation
[PDF-4.64 MB]
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Alternative Title:Project title: Synthesis of microsurfacing successes and failures
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Edition:Technical report; Sept. 2010-Aug. 2011.
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Abstract:Microsurfacing is a unique pavement preservation tool in the arsenal of maintenance agencies. It is known to
perform well when applied to the right pavement at the right time for the right distress. In order to ensure
microsurfacing performs well, an agency must know what constitutes the right road, right time and right
distress. Texas uses microsurfacing and wishes to answer these questions as well as uncover other factors
leading to successful use of this treatment.
This report describes the current state of practice of microsurfacing in Texas and compares it to best
practices extracted from existing literature. A survey of DOT personnel, contractors and emulsion suppliers
in Texas provides insight into the most crucial factors contributing to the success or failure of a
microsurfacing. From the results of the survey, literature reviews, case studies and site visits, the research
team analyzed material selection and mix design methods, construction practices, equipment practices and
performance measures for microsurfacings. It was concluded that project selection is the most important
contributor to a successful microsurfacing followed by construction practices. Reliance on contractors for
input into proper project selection places the agency in a vulnerable position. A certification course to
educate personnel is recommended.
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