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IMAGE 2.3
IMAGE 2.3
IMAGE 2.4
IMAGE 2.4
IMAGE 2.3& IMAGE 2.4: The Abutment wall made of brick has moderate to a significant depth of pointing loss and brick spalling. It can be seen from the pictures that it has a poor drainage system to drain out the deck water which is penetrating the walls and damaging the bricks and joineries.
IMAGE 2.3& IMAGE 2.4: The Abutment wall made of brick has moderate to a significant depth of pointing loss and brick spalling. It can be seen from the pictures that it has a poor drainage system to drain out the deck water which is penetrating the walls and damaging the bricks and joineries.
It could be caused by the degradation of masonry units due to salt and frost damage, which is aggravated by prolonged wetness or continuous rainfall through flow.
It could be caused by the degradation of masonry units due to salt and frost damage, which is aggravated by prolonged wetness or continuous rainfall through flow.
IMAGE 2.5
IMAGE 2.5
Decolouration of bricks, binder loss
The drainage of the substructure has a moderate blockage of weep holes and outlets so cleaning of weep holes and vegetation removal can avoid leakages.
Mortar analysis to be done efficiently to determine the degree of binder deficiency.
Also, the DPC layer is to be checked for waterproofing.
IMAGE 2.6
IMAGE 2.6
The columns in between two arches have a moderate loss of bricks because of improper drainage.
The application of mortar or grout with a pressure gun to penetrate as far as possible into the joints
IMAGE 2.7
IMAGE 2.7
A Transverse crack can be seen on the Arch barrel at its end edges also longitudinal cracks on spandrel walls and may be caused by live load like traffic overload creating shear stress on the inner part of the bridge.
Impact echo can be used to determine the thickness of the masonry unit. Impact echo can also be used to find cracks, delaminations, voids, or other deficiencies in the masonry structure that can help in repairing or maintenance .
IMAGE 2.8
IMAGE 2.8
The half joint has a diagonal crack which needs to be checked and filled. It may occur because of the joint gap and joining of two different material types(stone masonry& old brick masonry)
IMAGE 2.9
IMAGE 2.9
There is decolorisation of the parapet and spandrel wall, forming of white stains and edges, and the efflorescence of the arch barrel.
IMAGE 2.10
IMAGE 2.10
There is no foundation fault visible affecting any substructures but underwater inspection techniques shall be used to confirm the condition and identify defects, including scour .
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