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Off Topic / Pot holes, weather and road compounds
« on: July 03, 2012, 06:53:45 AM »
This question is for anyone who knows about how our roads get paved (GZire?). I've been to places like Tokyo, Connecticut, and just came back from a vacation that saw us in Vancouver, B.C. and Seattle where temperatures and weather conditions vary much more than they do here but yet it seems like the roads that I encountered had few if any potholes or bad cracks. As a Mechanical Engineer, my intuition tells me that if road surfaces are exposed to more temperature extremes (not just temperature but also wet seasons / dry seasons), then roads should be in worse condition. I'm guessing the mechanisms involve expansion and contraction cycles, viscosity changes in the asphalt, and erosion from rain - but I don't know for sure. So why is it that the roads suck more here? Are we using the same compounds but are unable to maintain it enough? Or are we using cheaper compound?