Asphalt Pavement Maintenance knowledge
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1, asphalt pavement common diseases are: cracks ruts, broken, weeping, loose, water damage and pits, subsidence, pro package.
2, from the crack manifestations can be divided into transverse cracks, longitudinal cracks and mesh three kinds of cracks. 3, 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. 4, the main reason for the formation of longitudinal cracks are: reason foundation, roadbed construction reasons, water infiltration and sabotage. 5, the main reason for the formation of transverse cracks are: material shrinks, asphalt and concrete temperature shrinkage, differential settlement. 6, the main reason for the 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. 7, asphalt pavement water damage to the main forms of damage are: network crack, pothole, slurry pump, Rut. 8, the formation of pits can be attributed to two main aspects of water damage and damage to oil. 9, the current repair method according to pit road Pavement repair equipment is divided into two that cold fill and hot fill method. 10, causes weeping: Mixture composition poorly designed, mixing the mixture control is lax, sticky layer of oil consumption inappropriate, poor quality of construction, water damage. 11, excessive use of asphalt is the most important reason to produce asphalt surface weeping. 12, the transverse cracks caused by the reflection of base cracking and asphalt concrete cracks caused by shrinkage temperature of at treatment method? A: For the base cracking caused by reflection cracks of asphalt and concrete temperature shrinkage caused by transverse cracks As small slit width can not be processed, such as the width of 3mm or more, the gap may be brushing clean with compressed air After blowing dust, the use of hot asphalt or emulsified asphalt crack filling material spreading method closure. As the slit width 5mm or more, can be seam debris removal, after the cracks along with compressed air or blowing slot, use sand or fine-grain material type hot mix asphalt filler tamping, and sealed with a soldering iron. 13, and the passage of rutting Treatment Methods? A: 1, for a continuous length does not exceed 30m, tread groove depth is less than 8mm, the feeling of driving a small swing, By baking pavement, harrowing, after adding appropriate new material can be compacted. 2, when the asphalt surface Wear layers, lateral passes, should be cleared unstable layer with milling machine galling, heavy paving layer. 3, when the base or subgrade instability, treatment should be reinforced, and then repair the surface. 4, for rutting due to poor construction quality caused by the grass-roots, goes in line before re-paving the surface layer to handle weak grassroots. 14, loose asphalt produced the main reason? A: 1, the local and grass-roots roadbed uneven settlement caused road damage; 2, weathered gravel containing particles after water intrusion caused by asphalt peeling; 3, with the increase in the use of time, combined with asphalt adhesive properties of the material itself decreases, prompting the asphalt surface in contact with the tire wear parts, resulting in reduction of asphalt content, fine aggregate loss; 4, mechanical damage or oil contamination. Related Sites: Tank Volume Asphalt Road Crack? Stihl Equipment For Sale cold asphalt in bags Inspection Camera and Vibratory Roller |
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