(3) Disintegration:
The
progressive breaking up of
the pavement into
small, loose pieces is
called
disintegration. If the is integration is not repaired in its early stages, complete reconstruction
of the pavement may be needed. The two most common types of disintegration are:
disintegration. If the is integration is not repaired in its early stages, complete reconstruction
of the pavement may be needed. The two most common types of disintegration are:
1. Potholes
2.
Patches
Potholes
are bowl-shaped holes similar to depressions. They are a progressive failure.
First, small fragments of the top layer are dislodged. Over time, the distress will progress
downward into the lower layers of the pavement. Potholes are often located in areas of poor
drainage, as seen in Figure. Potholes are formed when the pavement disintegrates under
traffic loading, due to inadequate strength in one or more layers of the pavement, usually
accompanied by the presence of water. Most potholes would not occur if the root cause was
repaired before development of the pothole. Repair by excavating and rebuilding. Area repairs
or reconstruction may be required for extensive potholes.
First, small fragments of the top layer are dislodged. Over time, the distress will progress
downward into the lower layers of the pavement. Potholes are often located in areas of poor
drainage, as seen in Figure. Potholes are formed when the pavement disintegrates under
traffic loading, due to inadequate strength in one or more layers of the pavement, usually
accompanied by the presence of water. Most potholes would not occur if the root cause was
repaired before development of the pothole. Repair by excavating and rebuilding. Area repairs
or reconstruction may be required for extensive potholes.
Ø Patches:
A
patch is defined as a portion of the pavement that has been removed and
replaced.
Patches are usually used to repair defects in a pavement or to cover a utility trench. Patch
failure can lead to a more widespread failure of the surrounding pavement. Some people do
not consider patches as a pavement defect. While this should be true for high quality patches
as is done in a semi permanent patch, the throw and roll patch is just a cover. The underlying
cause is still under the pothole. To repair a patch, a semi-permanent patch should be placed.
Extensive potholes may lead to area repairs or reclamation. Reconstruction is only needed if
base problems are the root source of the potholes.
Patches are usually used to repair defects in a pavement or to cover a utility trench. Patch
failure can lead to a more widespread failure of the surrounding pavement. Some people do
not consider patches as a pavement defect. While this should be true for high quality patches
as is done in a semi permanent patch, the throw and roll patch is just a cover. The underlying
cause is still under the pothole. To repair a patch, a semi-permanent patch should be placed.
Extensive potholes may lead to area repairs or reclamation. Reconstruction is only needed if
base problems are the root source of the potholes.
Comments
Post a Comment