BMC to conduct first ever audit of repaired potholes....Mumbai Mirror, 27th November 2012.
I have observed currently the practice of the contractor is to take huge bits of rock say 1 inch cubes and mix them in a hot tar and lay it on the ground. Run a Road Roller and claim to have the work done.
This to me is Grossly Incorrect.
What we need to do is first have the base earth well compacted to a level of hardness pre-determined.
Next we need is have a mix of rock say 30% 1 inch cube + 40% 0.5 inch cube + 30% 0.25 inch cube.
This will ensure the space between two 1 inch cubes are well occupied by 0.5 inch cube, and the space between two 0.5 inch cube is well occupied by 0.25 inch cube.
This will be leveled by a road Roller, leaving a depth of 1 inch for the Top layer.
The Top layer will be a coat of fines and rock size less than 0.25 inch cube. This will ensure the smoothness of the road, and not start giving way to weathering or dislodge of filled rock.
The Top layer will be a coat of fines and rock size less than 0.25 inch cube. This will ensure the smoothness of the road, and not start giving way to weathering or dislodge of filled rock.
This to me is the way ahead for Tar roads.
Also today many roads have kerbs with interlock blocks. Due to movements of the earth or shoddy installation these blocks become a major cause for tripping while pedestrians walk. The better way is to simply lay a minimal coat of tar over these displaced blocks so that the road/street is convenient until the next overhaul.
Also today many roads have kerbs with interlock blocks. Due to movements of the earth or shoddy installation these blocks become a major cause for tripping while pedestrians walk. The better way is to simply lay a minimal coat of tar over these displaced blocks so that the road/street is convenient until the next overhaul.
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