In order to reduce health hazards, the level of asphalt (bitumen) fumes can be reduced by recycling the existing asphalt on the spot which lowers he demand for new fresh asphalt and diminishes the need to cut away old asphalt that releases cancerous silica dust.
To reduce the traffic congestion and risk of run overs and back overs, the speed and productivity of construction work has to increase. Minimizing the number of tools and workers required will reduce the area of construction zone resulting in less traffic, blind spots and chances of causing accidents.
Spray injection pothole patchers are also new to the market. These systems do a great job at spraying separate coats of liquid binder and granular asphalt evenly which fills up the cracks and potholes quickly. However, the finished repairs look messy, uneven and they deteriorate quickly because hot asphalt is sprayed on cooler pavement surface creating a weak bond. Also, there is no compaction done for this method, leaving the asphalt loose. The spray injection method uses a blower at about 4 psi pressure to suck out granular asphalt and liquid binder from their separate tanks and sprays them evenly in order starting from liquid binder first, and finishing with a coat of granular asphalt on top.
There are two types of mid-size hand operated compactors: walk behind compactor rollers and reversible compactor plates. Walk behind compactor rollers use a drum to roll over and create compaction while reversible compactor plates use just an iron plate and two heavy duty counterweight motors attached to the plate which in turn create vibration and compaction force. As a result, they can output the same performance for a smaller size as they save space using just a plate instead of a drum roller.