Pavement Distresses

Stripping

Stripping
Description The loss of bond between aggregates and asphalt binder that...

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Rutting

Rutting
Description Surface depression in the wheelpath. Pavement uplift (shearing) may occur...

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Alkali-Aggregate Reaction

Alkali-Aggregate Reaction
Figure 1. Map/Pattern Cracking Resulting from an Alkali-Aggregate Reaction Alkali-aggregate reaction...

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De-Bonding of HMA Pavements

De-Bonding of HMA Pavements
De-Bonding Study Recent evidence in Washington State indicates that de-bonding of...

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De-Bonding of HMA Pavements/Case Studies

De-Bonding of HMA Pavements/Case Studies
Case Studies Case studies on three different projects were conducted in...

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De-Bonding of HMA Pavements/Construction Observations

De-Bonding of HMA Pavements/Construction Observations
Construction Observations of Some Washington State Projects The following section presents...

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De-Bonding of HMA Pavements/Core Logs

De-Bonding of HMA Pavements/Core Logs
Core Logs A set of core logs was obtained from the...

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Longitudinal Cracking

Longitudinal Cracking
Description Cracks parallel to the pavement's centerline or laydown direction. Can...

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Surface Waves

Surface Waves
Description Surface waves can appear in several different forms: Washboarding. Small...

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Top-Down Cracking

Top-Down Cracking
Top down cracking appears to be a common mode of HMA...

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Mat Shoving

Mat Shoving
Description Displacement of the HMA mixture in a longitudinal direction while...

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Mat Tearing

Mat Tearing
Description Mat tearing, or streaks in the mat, can be caused...

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Microcracking

Microcracking
Description Short transverse cracks usually 25 - 75 mm (1 -...

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Corrugation and Shoving

Corrugation and Shoving
Description A form of plastic movement typified by ripples (corrugation) or...

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Fat Spots

Fat Spots
Description Isolated areas in the mat where excess asphalt binder is...

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Popouts

Popouts
Description Small pieces of PCC that break loose from the surface...

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Depression

Depression
Description Localized pavement surface areas with slightly lower elevations than the...

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Reactive Aggregate Distress

Reactive Aggregate Distress
Description Pattern or map cracking (crazing) on the PCC slab surface...

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Fatigue Cracking

Fatigue Cracking
Description Series of interconnected cracks caused by fatigue failure of the...

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Reflection Cracking

Reflection Cracking
Description Cracks in a flexible overlay over an existing crack or...

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Roller Marks

Roller Marks
Description Indentations that remain in the mat surface after rolling operations...

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Joint Load Transfer System Deterioration

Joint Load Transfer System Deterioration
Description Transverse crack or corner break developed as a result of...

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Slippage Cracking

Slippage Cracking
Description Crescent or half-moon shaped cracks generally having two ends pointed...

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Transverse Cracking

Transverse Cracking
Description Cracks perpendicular to the pavement's centerline or laydown direction. Usually...

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Linear Cracking

Linear Cracking
Description Linear cracks not associated with corner breaks or blowups that...

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Transverse Screed Marks

Transverse Screed Marks
Description Transverse indentations in the mat surface across the width of...

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Water Bleeding and Pumping

Water Bleeding and Pumping
Description Water bleeding (left two photos) occurs when water seeps out...

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Non-Uniform Texture

Non-Uniform Texture
Description Differences in appearance within the mat surface. Extreme differences in...

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Pumping

Pumping
Description Movement of material underneath the slab or ejection of material...

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Punchout

Punchout
Description Localized slab portion broken into several pieces. Typically a concern...

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Raveling

Raveling
Description The progressive disintegration of an HMA layer from the surface...

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Shrinkage Cracking

Shrinkage Cracking
Description Hairline cracks formed during PCC setting and curing that are...

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Pavement Distress

Pavement Distress
Properly designed and maintained HMA pavements can provide many years of...

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Block Cracking

Block Cracking
Description Interconnected cracks that divide the pavement up into rectangular pieces....

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Potholes

Potholes
Description Small, bowl-shaped depressions in the pavement surface that penetrate all...

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Bleeding

Bleeding
Description A film of asphalt binder on the pavement surface. It...

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Faulting

Faulting
Description A difference in elevation across a joint or crack usually...

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Spalling

Spalling
Description Cracking, breaking or chipping of joint/crack edges. Usually occurs within...

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General Guidance

General Guidance
Figure 1: US 101 in Washington state. Figure 2: A two-lane...

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De-Bonding of HMA Pavements/Layer Bonding

De-Bonding of HMA Pavements/Layer Bonding
Major Themes From Past Tack Coat Studies This section attempts to...

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Blowup

Blowup
Description A localized upward slab movement and shattering at a joint...

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Corner Break

Corner Break
Description A crack that intersects the PCC slab joints near the...

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Durability Cracking

Durability Cracking
Description Series of closely spaced, crescent-shaped cracks near a joint, corner...

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Joint Problems

Joint Problems
Description Bumps, elevation differences, a lack of mix or low density...

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Polished Aggregate

Polished Aggregate
Description Areas of pavement (either PCC or HMA) where the portion...

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