a. Asphalt Pavement common diseases are: cracks ruts, broken, weeping, loose, water damage and pits, subsidence, mound.
b. From the crack manifestations can be divided into transverse cracks, longitudinal cracks and cracks in three kinds of mesh
c. The main factors affecting the cracks are: variety and grade asphalt, asphalt mixture composition, the surface layer thickness of base material shrinkage, soil and climatic conditions and other groups.
d. The main reason for the formation of longitudinal cracks are: reason foundation, roadbed construction reasons, water infiltration and sabotage.
e. The main reason for the formation of transverse cracks are: material shrinkage, temperature shrinkage of concrete and asphalt, differential settlement.
f. The main reason Rut are: asphalt aggregate ratio is too large, excessive surface wear, rain Invasive internal asphalt concrete, grass-roots containing unstable mezzanine leading to the formation of the waveform Sideway push rut.
g. Asphalt Pavement Water Damage major failure modes are: network crack, pothole, slurry pump, Rut.
h. The formation of pits can be attributed to water damage and damage to two main aspects of oil
i. Currently pit road repair method according Pavement repair equipment is divided into two kinds: cold fill and hot fill method.
j. Cause weeping: Mixture composition poorly designed, mixing the mixture control is lax, sticky layer of oil consumption inappropriate, poor quality of construction, water damage.
