The Process Gravel Seal
1. First, asphalt is mixed with about 30% water.This emulsified mixture is then applied to the road using a specialized spray truck. As soon as this liquid asphalt meets the road surface the water begins to evaporate.
2. Immediately after spraying this asphalt, a layer of crushed gravel is applied by a specialized spreader.This gravel is produced according to the Ministry specifications. Most often, the gravel has a maximum size of 16mm (5/8”-1/2”).
3. Next, the gravel is compacted and embedded into the asphalt by rubber tired rollers. Despite the high pressure rollers, some gravel will not become embedded in the asphalt.
4. The newly seal coated surface can require up to two days to cure properly. Hot, dry summer days help speed this process in which all of the remaining water in the emulsion evaporates and the asphalt hardens.Traffic can pass over this surface at reduced speeds during the curing process.
5. After curing, loose gravel is swept off the surface.This may take several sweepings.