Wikipedia said:Cold mix asphalt concrete is produced by emulsifying the asphalt in water with (essentially) soap prior to mixing with the aggregate. While in its emulsified state the asphalt is less viscous and the mixture is easy to work and compact. The emulsion will break after enough water evaporates and the cold mix will, ideally, take on the properties of cold HMAC. Cold mix is commonly used as a patching material and on lesser trafficked service roads.
Cold asphalt is made with a different type of binder than hot asphalt. It uses emulsified or cutback asphalt, which can be mixed and applied at lower temperatures compared to hot asphalt, which uses heated asphalt cement.
Cold asphalt hardens through a process called curing, which involves the evaporation of water from the emulsion or cutback asphalt. As the water evaporates, the asphalt particles come closer together and the mixture becomes more solid and durable.
The recommended temperature for applying cold asphalt is between 50-60°F (10-15°C). This temperature range allows for optimal curing of the asphalt and ensures a strong and durable pavement surface.
The curing time for cold asphalt can vary depending on factors such as temperature, humidity, and thickness of the layer applied. Generally, it can take anywhere from a few hours to a few days for cold asphalt to fully cure and reach its maximum strength.
Yes, cold asphalt can be used to repair potholes in winter. Its ability to be mixed and applied at lower temperatures makes it a suitable option for winter repairs. However, it is important to follow the manufacturer's instructions and ensure that the pothole is clean and dry before applying the cold asphalt.