As the development of the technology, crack sealing machine has attracted more people to use because of its good features with saving labor resources and materials. However, it is important to have some knowledge to select asphalt.
(1)Selection of asphalt with good performance at high and low temperature performance, anti-aging properties, low wax content, high-viscosity high-quality homemade or imported asphalt. Where conditions permit, various types of modifiers may be incorporated into the asphalt to improve the base performance.
(2）Selection of aggregates should be used rough surface, hard stone, wear resistance, embedded crowded role, and good adhesion properties of asphalt aggregate. If the aggregate is acidic, it should be added to a number of anti-stripping agent or lime powder, to ensure that the mixture of anti-peeling performance, and should minimize the water content of aggregate.
(3）Determination of mixture gradation High temperature stability and fatigue performance of asphalt mixture, low temperature crack resistance, pavement surface characteristics and durability are two contradictory, mutual restraint, take care of one aspect of performance, may reduce performance on the other hand .
