2. Emulsified asphalt shall be used as prime coat or seal coat immediately after the semi-rigid base course is rolled or at the latest after the maintenance.
3. After the prime coat or adhesive coat is completed, the asphalt surface layer shall be paved as soon as possible.
Extended data
Asphalt pavement has the following important features:
1, asphalt pavement has high temperature stability.
High temperature stability is the ability of asphalt pavement to resist flow deformation. Because the strength and stiffness of asphalt pavement decrease significantly with the increase of temperature, in order to better ensure that asphalt pavement will not produce waves, movement, rutting, congestion and other diseases under the repeated action of driving load in high temperature season, asphalt pavement should have good high temperature stability.
2. Asphalt pavement has low temperature crack resistance.
Low temperature crack resistance refers to the ability of asphalt pavement to resist low temperature shrinkage cracks. With the decrease of asphalt pavement temperature, the stiffness increases and the expansion capacity decreases. Under the action of external load, part of the pressure is too late to relax, and the pressure gradually accumulates. When these accumulated stresses exceed the tensile strength of the material, cracks will occur, which will lead to the destruction of the pavement.
3. Asphalt pavement has water stability.
Water stability refers to the ability of asphalt pavement to resist the gradual peeling, falling off, loosening and pitting of asphalt film caused by water erosion. This is because the existence of moisture not only reduces the adhesion of asphalt itself, but also destroys the adhesion between asphalt and mineral aggregate in asphalt pavement, thus accelerating the peeling phenomenon and causing water damage to pavement.
4, asphalt pavement should have anti-fatigue performance.
Fatigue resistance refers to the ability of asphalt pavement to resist damage under repeated loads. It is due to the repeated action of wheel load during the use of asphalt pavement, which is in the state of stress and strain superposition for a long time, resulting in the gradual decline of pavement structural strength.
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