7/26/2019 Catalogue of Defects

1/3

Catalogue of

Defects Description Causes Examples

Longitudinal

Crack

The direction of

crack is parallel to

the flow of traffic.

Fatigue pavement, unstable base and poor

construction.

Transverse

Crack

The asphaltperpendicular to the

pavements

centerline.

Temperature drop significantly, shrinkage of thehot mix asphalt !"#$ surface due to low

temperature of asphalt binder hardening,

reflective crack caused by cracks beneath the

surface of !"# layer

Crocodile Crack

%nterconnecting or

interlaced cracking

in the asphalt layer.

The cell si&e can

vary in si&e up to

'(( mm.

#sphalt pavement distress instigated by sub)base

failure, poor drainage and repeated

overloading.

7/26/2019 Catalogue of Defects

2/3

*lock Crack

%nterconnected

crack that divided

the pavement into

rectangular piece.

The block range

si&e can range from

(.+ mto -m.

!ot mix asphalt shrinkage and temperature

cycling are the maor cause of the block

cracking. The asphalt binder was unable to

expand can contract due to asphalt binderaging and poor choice of asphalt binder in the

mix of design.

/aveling

The progressive

disintegration of the

hot mix asphalt

layer !"#$ as a

result of

dislodgement of

aggregate particles.

Loss of bonding between aggregate particles and

the asphalt binder as a result of coating on

dusty aggregate, aggregate segregation,

inade0uate compaction during construction

and mechanical dislodging by certain types of

traffic.

1elamination

/espected roads

was loss large

discrete area of the

wearing coarse

layer, usually this

failure is

conunction with aclear delineation of

the wearing coarse

from the layer

below.

%nade0uate cleaning during constructing the road

%nade0uate tack coat before placing upper layer

2eepage of water through asphalt resulting in the

breaking of the bind between surface and layer

below

#dhesion of surface binder to the tires of

vehicles

7/26/2019 Catalogue of Defects

3/3

3otholes

!ole break of road

pavement. 3othole

usually accompany

with crocodile

crack.

The presence of the water in the underlying soil

structure and the presence of traffic passing

over the affected area. 4hen the water was

introduced into the underlying soil structure it

will weaken the supporting soil. #fter this area

has been affected traffic flow will break the

poorly supported asphalt surface. Continued

traffic action will eects both asphalt and the

underlying soil material to create a hole in the

pavement.

3atch

# portion of new

hot mix asphalt

overlay an oldpavement. 5ormally

this is due to

treating distress in

locali&ed area

Treating the local distress on the pavement.1uring the treating process the cold mix

asphalt was introduce to repair the distress on

the pavement.