Types of Failures in Rigid Pavements Joint Spalling in Rigid Pavements. Excessive compressive stress causes deterioration in the joints,... Faulting in Rigid Pavements. The difference in elevation between the joints is called as faulting. Polished Aggregate in Rigid Pavements. The repeated traffic ... rigid pavement pdf rigid pavement and flexible pavement rigid pavement design rigid pavement construction flexible pavement versus rigid pavement aashto rigid pavement design aashto rigid pavement calculator rigid pavement pdf rigid pavement and flexible pavement rigid pavement design rigid pavement construction flexible pavement versus rigid pavement aashto rigid pavement design

1. FAILURES IN RIGID PAVEMENT
PESENTED BY
GAYATHRY SATHEESAN
TYPESOFFAILURESINRIGIDPAVEMENTS
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2. FAILURES OF RIGID PAVEMENT
 Failure in rigid pavement (or cement concrete pavement)
can be identified by formation of cracks on the pavement
surface.
 The two prime factors responsible for rigid pavement
failure are
1. Use of poor quality material
2. Inadequate stability of the pavement structure
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3. 1. Poor quality of material consist of following items
 Using soft aggregate
 Poor quality of sub-grade soil
 Poor joint filler R sealer materials
2. Inadequate stability of the pavement structure can be due to
following reason
 Inadequate pavement thickness
 Lack of sub-grade support
 Improper compaction of sub-grade
 Improper spacing of joints
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4. TYPES OF FAILURE IN RIGID PAVEMENT
 Scaling of cement concrete
 Shrinkage cracks
 Joint spalling
 Warping cracks
 Pumping
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5. 1. SCALING OF CEMENT CONCRETE
 It is the peeling off or flaking off of the top layer or skin of the
concrete surface.
This may be due to the following reasons
 Improper mix design
 Excessive vibration during compaction of concrete
 Laitance of concrete
 Performing finishing operation while bleed water is on surface
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Fig;scaling of cement concrete
Source;https://i1.wp.com/civilblog.org/wpc
ontent/uploads/2016/01/Scaling.jpg

7. 2. SHRINKAGE CRACKS
 Formation of hairline shallow cracks on concrete slab is the
indication of shrinkage cracks.
 Shrinkage cracks develop on concrete surface during the
setting & curing operation. These cracks may form in
longitudinal as well as in transverse direction.
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Img;shrinkage images
Source:https:///civilblog.org/wpcontent/uploadshrinkage-
cracking.jpg

9. 3. JOINT SPALLING
 It is the breakdown of the slab near edge of the joint.
 Normally it occurs within 0.5 m of the joints.
The common reasons for this defect are
 Faulty alignment of incompressible material below concrete
slab.
 Insufficient strength of concrete slab near joints.
 Freeze-thaw cycle.
 Excessive stress at joint due to wheel load.
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Fig.: Joint Spalling in Rigid Pavement Slabs
https://theconstructor.org/wpcontent/uploads/2017/03/joint-
spalling-rigid-pavementa.jpg

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Img ;joint spalling
Source: https://theconstructor.org/wp-
content/uploads/2017/03/failures-in-rigid-pavements.jpg

12. 4. WARPING CRACKS
 When joints are not designed properly against hot weather, it
prevents expansion of concrete slab and therefore results in
development of excessive stress.
 This stress cause formation of warping cracks of the concrete slab
near the joint edge.
 This type of crack can be prevented by providing proper
reinforcement at the longitudinal and transverse joints.
 Hinge joints are generally used to relieve the stress due to
warping
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Img: warping cracks
Source: https://theconstructor.org/wp-
content/uploads/2017/03/durability-cracking-failure-in-rigid-
pavements.jpg

14. 5. PUMPING
 When material present below the road slab ejects out through the
joints or cracks, it is called pumping.
 When soil slurry comes out it is called mud pumping.
The common reasons for this defect are
 Infiltration of water through the joints, cracks or edge of the
pavement forms soil slurry
 When there is void space between slab and the underlying base
of sub-grade layer.
 Poor joint sealer allowing infiltration of water
 Repeated wheel loading causing erosion of underlying material14
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Img : pumbing failure
Source:https://theconstructor.u
ploadspumping-effect.jpg
Img: pumbing failure
Source:https://civilblog.org/wp-
content/uploadsPumping.jpg

16. THANK YOU 
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