Optimal Timing of Pavement Preventive Maintenance Treatment Applications (2004) / Chapter Skim
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From page 7... ...
and Iowa (9) have constructed test sections to evaluate the performance of certain preventive maintenance treatments; Michigan, New York, and California have well-established preventive maintenance programs which are documented in comprehensive manuals.
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From page 8... ...
. Concrete-Surfaced Pavements Bituminous-Surfaced Pavements Full depth concrete pavement repair Joint resealing Crack sealing Joint and surface spall repair Dowel bar retrofit Diamond grinding Underdrain outlet repair and cleaning Concrete pavement restoration Bituminous shoulder ribbons Bituminous overlay Surface milling and bituminous overlay Ultrathin bituminous overlay Crack treatment Overband crack filling Microsurfacing Chip seals Bituminous shoulder ribbons Shoulder seals Paver placed surface seals Hot in-place bituminous recycling TABLE 1 Treatments included in MDOT's 1999 and 2000 Capital Preventive Maintenance program (11)
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From page 9... ...
Some treatments may serve several purposes; a slurry seal can protect an HMA surface from environmental effects, improve surface friction, or seal minor cracks in the pavement surface. Any treatment considered for a preventive maintenance program should address one or more specific purposes so that the conditions of its use are clear.
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From page 10... ...
Maintenance of Drainage Features EVALUATION FACTORS CRACK FILLING AND CRACK SEALING Climate Traffic Conditions Addressed Contraindications Description: These treatments are intended primarily to prevent the intrusion of moisture through existing cracks. Crack sealing refers to a sealant operation that addresses "working" cracks, i.e., those that open and close with changes in temperature.
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From page 11... ...
TABLE 4 Characteristics of fog seals EVALUATION FACTORS SLURRY SEALS Climate Traffic Conditions Addressed Contraindications Description: A mixture of well-graded aggregate (fine sand and mineral filler) and asphalt emulsion that is spread over the entire pavement surface with either a squeegee or spreader box attached to the back of a truck.
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From page 12... ...
. TABLE 6 Characteristics of scrub seals EVALUATION FACTORS MICROSURFACING Climate Traffic Conditions Addressed Contraindications Description: Microsurfacing consists of a mixture of polymer-modified emulsified asphalt, mineral aggregate, mineral filler, water, and additives applied in a process similar to slurry seals.
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From page 13... ...
. TABLE 8 Characteristics of chip seals EVALUATION FACTORS THIN HOT-MIX ASPHALT OVERLAYS Climate Traffic Conditions Addressed Contraindications Description: Plant-mixed combinations of asphalt cement and aggregate applied to the pavement in thicknesses between about 19 and 38 mm (0.75 and 1.50 in.)
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From page 14... ...
. TABLE 10 Characteristics of ultrathin friction courses EVALUATION FACTORS JOINT RESEALING AND CRACK SEALING Climate Traffic Conditions Addressed Contraindications Description: Resealing of transverse joints and sealing of cracks in PCC pavements is intended to minimize the infiltration of surface water into the underlying pavement structure and to prevent the intrusion of incompressibles into the joint.
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TABLE 12 Characteristics of diamond grinding EVALUATION FACTORS UNDERSEALING Climate Traffic Conditions Addressed Contraindications Description: Undersealing is the pressure insertion of a flowable material beneath a PCC slab to fill voids between the slab and base, thereby reducing deflections and, consequently, deflection-related distresses such as pumping or faulting. It is most often performed at areas where pumping and loss of support occur, such as beneath transverse joints and deteriorated cracks.
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From page 16... ...
Additional Information Repetitive applications will impart some structural benefit to the pavement in the form of additional load-carrying capability. TABLE 14 Characteristics of load transfer restoration EVALUATION FACTORS MAINTENANCE OF DRAINAGE FEATURES Climate Traffic Conditions Addressed Contraindications Description The following activities are used as needed to improve or enhance the drainage capabilities of the existing pavement: ■ Install/maintain reference markers at outlet locations.
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From page 17... ...
Important attributes of preventive maintenance treatments may be considered for selecting treatments to be included in a preventive maintenance program and for determining when such treatments should be applied.
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