REPAIR OF CEMENT CONCRETE ROAD: - The
maintenance of cement concrete roads consists of:
[1]
Sealing of Joints and Cracks: - Joints
and cracks will allow water to percolate to the base and sub grade. Prevention
of infiltration of surface water to reach sub grade under pavement and
collection of water in cracks and joints, will help in improving the life of
the road. It is for t his reason that the joints and cracks should be properly
sealed and filled. Before filling the joints, the joint should be cleaned.
Sometimes compressed air is used to clean the joints before filling or sealing.
For better and proper sealing, the old sealing material should be removed. The
sealing material consists of bitumen and sand, cork, impregnatedfibre board or a ready-made
sealing compound.
[2]
Patching of Damaged areas: - Patching
of damaged concrete surface is a very difficult job and cannot be done
satisfactorily. Small patches and holes are usually filled with bituminous
materials or synthetic resins, grit mix like Araldite etc.