Irbid pavementsAugust 19, 2008
If you have ever wondered how many ways something simple can be screwed up, you can come to Irbid and observe our pavements. These clearly show how much zift zift-work can achieve.
The typical types of flaws include:
1. The longitudinal cracks. These seem to be the result of simple aging, resulting from loss of the more volatile components of the pavement material. This loss probably causes both shrinkage and lower elasticity in the material.
2. The pot holes. These features are probably the result of growth of small holes as cars break away at the edges. These do not seem to be comparable to other potholes in the US, which are explained by either picking away at material separated by the longitudinal cracks described above, or freeze-thaw features caused by differential expansion and shrinkage.
3. The differential settling. This is caused by poor compaction of the underlying base coarse. It is exasperated by sloppy recompaction after underground excavations are refilled and by broken water pipes.
4. I don’t know what to call these. They are deep curved cracks that extend to underlying, older pavements. The rounded curvatures around the edges seem to suggest that they are a result of almost fluid behavior. My guess it that the pavement material is too liquidy when it is placed. Presumably, it is easier to spread this way. Who cares if it busts people’s cars?
There are others, but these are the most interesting to me. Any professional feedback is welcome. (Thanks to Shabib, my photographer :)).