Very dramatic pictures Anthony.... But, Not of a Road.
The weight of a loaded 10 yard dump is approx. 30 tons, a belly dump twice that. Not forgetting the grinder and roller... And the Road Workers! All out there working "ON" a "Bowl of Soup"! If that is the case why repair it? why not just let is go? Sorry to say they got a bad batch. It's a do over..
The temperature of the mix on the base after it has passed through the laydown machine – not the mix or manufacturing temperature -- is the most important factor in determining the available time for compaction.
On paving and overlay projects, if the hot mix asphalt pavement cools too quickly, the entire surface will ravel leaving a rough, rocky surface in a short period of time.
The temperature of the mix on the base after it has passed through the laydown machine – not the mix or manufacturing temperature -- is the most important factor in determining the available time for compaction.
Ambient (air) temperatures, base (aggregate and existing asphalt) temperatures, and hot mixed asphalt temperatures are very critical to obtaining compaction and longevity of the newly paved surfaces and patches.
Hot mixed asphalt is manufactured at temperatures between 270°F and 325°F. Depending on the environmental conditions and the distance from the hot mix plant to the project, hot mix asphalt can lose between 5°F and 25°F.
The temperature of the mix on the base after it has passed through the laydown machine – not the mix or manufacturing temperature – is the most important factor in determining the available time for compaction. Hot mix asphalt pavement arrives at a project at temperatures between 275°F and 300°F and is installed on the existing base by mechanical methods (laydown machines).
If the air and base temperatures are colder than required or specified, then the asphalt pavement will cool too fast, causing it to set up and making it very difficult to obtain the required or specified compacted density.
Thin pavement layers will cool quicker than thicker layers, and should the base or ambient temperature be low, the hot mix asphalt will cool quicker, density won’t be achieved, and the patch will ravel and fall apart. On paving and overlay projects, if the hot mix asphalt pavement cools too quickly, the entire surface will ravel leaving a rough, rocky surface in a short period of time. This not only results in a poor surface, it results in a surface that will retain water, reducing the life of the pavement or the patch by accelerating the raveling process. It is very important to monitor all temperatures (ambient, base, and hot mix asphalt) and wind velocity during the paving process.
So again, No Worries...It's a Slow New Day for this mindless drivel to be aired by RT especially