What Does Final Asphalt Mean?
Final asphalt is the last stage of road paving that marks the end of the paving process. As the popularity of trenchless construction and rehabilitation techniques rises, the need to break asphalt roads has decreased considerably.
Trenchless construction methods such as directional drilling and pipe ramming only require two excavations, one at the launch site and one at the point of pipe exit.
Trenchless rehabilitation techniques such as cured-in-place pipe (CIPP), thermoformed pipe and sliplining can be carried out from manholes. However; asphalt has to be broken at manhole locations and sometimes in order to rehabilitate the manhole itself.
Trenchlesspedia Explains Final Asphalt
The paving process for asphalt road begins with the demolition and removal of the existing surface. Since asphalt roads require proper drainage, instruments are used to measure and grade the surface. Soft spots on the surface are packed via undercutting to prevent the sinking of the surface later.
This base is then overlaid with a binder layer consisting of aggregate and oil for allowing the final asphalt layer to adhere firmly to the surface. Finally, asphalt is laid, compacted with a roller and allowed to cure. Where existing manholes are lower, they are raised to match the final asphalt surface before the manholes are covered with lids.