Tour de Pothole.. pg 8, Mumbai Mirror, 1st August 2013
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.
From the image it can be seen that the stone size is larger for a surface repair.
I had in an earlier blog written how it should be done which I copy below:
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.
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.... http://simplesolutionsforall.blogspot.in/2012/11/audit-of-repaired-potholes.html
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