Page 7 - EBS Pavement Protection System Brochure

™ ™ ™
PAVEMENT PROTECTION SYSTEM PAVEMENT PROTECTION SYSTEM AVEMENT PROTECTION SYSTEM
P
™ ™ ™
Cracks
Transverse Cracks - at approximately right angles to the centerline is a transverse crack. They
are often regularly spaced. The cause is movement due to temperature changes and hardening
of the asphalt with aging. Transverse cracks will initially be widely spaced (over 50 feet or 15
meters). Additional cracking will occur with aging until they are closely spaced (within several
feet or a meter). These usually begin as hairline or very narrow cracks, with aging they widen. If
not properly sealed and maintained, secondary or multiple cracks develop parallel to the initial
crack. The crack edges can further deteriorate by raveling and eroding the adjacent pavement.
Prevent water intrusion and damage by sealing cracks, which are more than 1/4" (6mm) wide.

Reflection cracks - cracks in overlays reflect the crack pattern in the pavement underneath.
Difficult to prevent and correct.
Solution: Thick Overlay with EBS mixed with soil, reconstruction of wearing course
layer usually required with a new EBS Seal on top.

Slippage Cracks - A crescent of rounded cracks in the direction of traffic, caused by slippage
between the overlay and underlying pavement, Slippage is most likely to occur at intersections
where traffic is stopping and starting.
Solution: Repair by removing the top surface, ensure compaction, and re-surfacing
using EBS overlay sealant.

Longitudinal Cracking - Cracks running in the direction of traffic, these centerline or lane
cracks are caused by inadequate bonding during construction and reflect cracks in underlying
pavement. Longitudinal cracks in the wheel path indicate fatigue from heavy vehicle loads;
cracks within one foot (30cm) of the edge are caused by insufficient shoulder support, poor
drainage, or frost. Cracks start as hairline and widen and erode with age. Without crack filling
they will “ravel”, develop multiple cracks, and become wide enough to require filling.
Solution: Filling and sealing cracks with EBS will reduce moisture penetration
and prevent further subgrade weakening. Multiple cracks in the wheel path
indicate a need for strengthening with an overlay or reconstruction
followed by an EBS surface seal.

S O I L S O L U T I O N SO I L S O L U T I O N SO I L S O L U T I O N S
S S ® ® ®
Consider it Solved.

™ ™ ™
In
Intelligent ™ ™ ™
Intelligent telligent telligent
In
R
R
Road Solutionsoad Solutionsoad Solutions Soil Solutions (International) Ltd. EBS – Pavement Protection System