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LTPP pavement maintenance materials : PCC partial-depth spall repair experiment, final report.
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1999-10-01
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[PDF-28.47 MB]
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Edition:Final report; Oct. 1993-June 1999.
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Abstract:The Strategic Highway Research Program (SHRP) H-106 maintenance experiment and the Federal Highway Administration
(FHWA) Long-Term Monitoring (LTM) of Pavement Maintenance Materials Test Sites project studied the repair of partialdepth
spalls in concrete pavements. The purpose of partial-depth spall repair is to restore a pavement's structural integrity,
improve its ride quality, and extend its serviceable life.
Highway agencies spend a large amount of time and money annually performing partial-depth spall repairs, both as temporary
and permanent fixes. Frequently, the repairs are not made as efficiently as desired or do not perform as long as intended. The
primary consequences are added disruption to traffic, more exposure of patching crews to traffic, and additional maintenance
expenditures. The purpose of this study, then, was to address the merits and deficiencies of current spall repair materials,
designs, and practices. The study evaluated the relative performance of selected patching materials, as well as the effect of
selected repair methods. The study also examined repair material properties and tests that correlate well with field performance.
This report documents the entire portland cement concrete (PCC) partial-depth spall repair study, including the installation of 30
unique repair types (i.e., combinations of patching material and patching method) at 4 different test sites, the laboratory testing
of experimental repair materials, and the 7-year performance monitoring of the various partial-depth repairs. It also discusses
the results of comprehensive statistical analyses conducted on material performance and laboratory testing data. The results of a
detailed cost-effectiveness analysis are also presented.
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