Common asphalt pavement distresses treatments 02272013 eng
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Common asphalt pavement distresses treatments 02272013 eng

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  • The name reflection cracking indicates that the crack is initiated by action in the underlying layers that produce stresses in the asphalt pavement surface which exceed the strength of the materials. The textbook definition of reflection cracking at joints is “ cracks in asphalt concrete overlay surfaces that occur over joints in concrete pavements. ” But a more general definition of reflection cracking is: Cracks in the asphalt overlay that reflect the crack pattern in the pavement structure underneath
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  • Bleeding or flushing, as it is sometimes called, is most often caused by too much asphalt in one or more of the pavement layers. A surface treatment that had too high an application rate, or that has lost its cover aggregate may also be responsible. Spillage of oils on the pavement can force the asphalt to the surface, as well.
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Common asphalt pavement distresses treatments 02272013 eng Common asphalt pavement distresses treatments 02272013 eng Presentation Transcript

  • 沥青路面常见病害处治方案Common Asphalt Pavement Distresses Treatments 西安达刚路面机械股份有限公 司 XI’AN DAGANG ROAD MACHINERY CO. LTD. Tel: 0086 29 88327462 E-mail: sales@xadagang.cn Website: www.xadagang.cn www.dgroadmachinery.com
  • 沥青路面常见病害 Common Asphalt Pavement Distresses 裂 缝 Cracking 表面变形 Surface Deformation 表面缺陷 Surface Defects 填补病害和坑槽 Patching and Potholes 其它病害 Miscellaneous Distresses
  • 裂缝 Cracking 裂缝类型 Types  疲劳裂缝 Fatigue Crack  温缩 / 横向裂缝 Thermal/Transverse Crack  块状裂缝 Block crack  边缘裂缝 / 啃边 Edge crack  纵向裂缝 Longitudinal crack  反射裂缝 Reflection crack  滑移裂缝 Slippage crack
  • 疲劳裂缝 / 龟裂 Fatigue cracking/ AlligatorCracking
  • 疲劳裂缝 / 龟裂 Fatigue cracking/ AlligatorCracking 可能的原因 Possible Causes  路面结构强度不足 Insufficient pavement structural strength  路面寿命终结 End of pavement life  路面负荷太重 Too heavy of loads
  • 疲劳裂缝 / 龟裂 Fatigue cracking/ AlligatorCracking  病害处治 Cures  局部修补 Localized patching  碎石封层 Chip seal or seal coat  铣刨和重铺罩面 Mill and overlay
  • 温缩 / 横向裂缝Thermal/Transverse Cracking
  • 温缩 / 横向裂缝Thermal/Transverse Cracking 可能的原因 Possible Causes  温度变化造成的路面收缩与膨胀 Contraction and Expansion of Pavement with Changing Temperatures
  • 温缩 / 横向裂缝Thermal/Transverse Cracking 病害处治 Cures  封缝或灌缝 Crack sealing or Crack filling  局部修补 Localized patching  全深式裂缝维修 Full-depth crack repair  碎石封层 Chip seal or seal coat  全深式再生 Full-Depth Reclamation
  • 块状裂缝 Block Cracking
  • 块状裂缝 Block Cracking 可能的原因 Possible Causes  高空隙率 High Void Content  沥青混凝土氧化硬化 Oxidative Hardening of the AC  温缩裂缝 Thermal Cracking
  • 块状裂缝 Block Cracking 病害处治 Cures  封缝或灌缝 Crack sealing or Crack filling  局部修补 Localized patching  碎石封层 Chip seal or seal coat  热拌沥青混合料薄层罩面 Thin hot-mix overlay  全深式再生 Full-Depth Reclamation
  • 边缘裂缝 Edge cracking
  • 边缘裂缝 Edge cracking 可能的原因 Possible Causes  路面下的土移动 Soil Movement Beneath Pavement 病害处治 Cures  封缝或灌缝 Crack sealing or Crack filling  局部修补 Localized patching  全深式再生 Full-Depth Reclamation
  • 纵向裂缝 Longitudinal cracking
  • 纵向裂缝 Longitudinal cracking 可能的原因 Possible Causes  低温 Low temperature  重载交通 Overload traffic  施工接缝 longitudinal joint  路基移动 Road base movement 病害处治 Cure  封缝或灌缝 Crack sealing or Crack filling  局部修补 Localized patching  全深式裂缝维修 Full-depth crack repair
  • 反射裂缝 Reflection cracking
  • 反射裂缝 Reflection cracking 可能的原因 Possible Causes  下层结构的裂缝或接缝反射 Reflection of existing cracks or joints in the underlying structure  水泥混凝土基层移动 Concrete slab movements 病害处治 Cure  封缝或灌缝 Crack sealing or Crack filling  局部修补 Localized patching  热拌沥青混合料薄层罩面 Thin hot-mix overlay
  • 滑移裂缝 Slippage cracking
  • 滑移裂缝 Slippage cracking 病害描述 Description  在刹车、转弯、加速路段出现的的 U 型开裂 U-shaped cracks in areas of braking, turning, accelerating. 可能的原因 Possible Causes  沥青表面层与其下卧层间的粘结力差 Poor bond between asphalt surface and underlying layer 病害处治 Cures 局部修补 Localized patching
  • 表面变形 Surface Deformation 类型 Types  车辙 Rutting  推挤 / 拥包 Shoving and Corrugation
  • 车辙 Rutting
  • 车辙 Rutting 可能的原因 Possible Causes  施工过程中沥青混合料压实不足 Insufficient compaction of HMA layers during construction. (If it is not compacted enough initially, HMA pavement may continue to densify under traffic loads.)  路面承载不足致使路基出现车辙 Subgrade rutting (e.g., as a result of inadequate pavement structure)  沥青混合料设计或生产不正确 (如沥青含量过高、粉料过多 、规则集料量不足) Improper mix design or manufacture (e.g., excessively high asphalt content, excessive mineral filler, insufficient amount of angular aggregate particles)
  • 车辙 Rutting 病害处治 Cures 局部修补 Localized patching 微表处 Micro Surfacing 热拌沥青混合料薄层罩面 Thin hot-mix overlay
  • 推挤 / 拥包 Shoving and Corrugation
  • 推挤 / 拥包 Shoving and Corrugation 可能的原因 Possible Causes  不稳定的沥青混合料层 An unstable (i.e. low stiffness) HMA layer (caused by mix contamination, poor mix design, poor HMA manufacturing, or lack of aeration of liquid asphalt emulsions)  路基湿度过大 Excessive moisture in the subgrade  层间移动滑移 Slippage between layers
  • 推挤 / 拥包 Shoving and Corrugation 病害处治 Cures 局部修补 ( 挖除和填补 ) Localized patching ( Remove the distorted pavement and patch )  铣刨和重铺 Milling and Overlay ( Remove the damaged pavement and overlay )
  • 表面缺陷 Surface Defects 类型 Types  泛油 Bleeding  骨料磨光 Polished Aggregate  松散 Raveling
  • 泛油 Bleeding
  • 泛油 Bleeding 可能的原因 Possible Causes  沥青混合料沥青含量过高 ( 沥青混凝土路面) Excessive asphalt binder in the HMA (either due to mix design or manufacturing)  沥青洒布量过大 (沥青表处路面) Excessive application of asphalt binder during BST application  沥青混合料孔隙率过低 Low HMA air void content (e.g., not enough room for the asphalt to expand into during hot weather)
  • 泛油 Bleeding 病害处治 Cures  碎石封层 Seal coat or Double chip seal  稀浆封层 Slurry seal  微表处 Micro Surfacing  热拌沥青混合料薄层罩面 Thin hot-mix overlay
  • 骨料磨光 Polished Aggregate
  • 骨料磨光 Polished Aggregate 可能的原因 Possible Causes  软骨料 Soft aggregate  重载交通 Heavy traffic 病害处治 Cures  碎石封层 Seal coat or Double chip seal  稀浆封层 Slurry seal  微表处 Micro Surfacing  热拌沥青混合料薄层罩面 Thin hot-mix overlay
  • 松散 Raveling
  • 松散 Raveling 可能的原因 Possible Causes  骨料颗粒和沥青之间缺乏粘结力(原因:骨料含尘 量大、骨料离析、施工过程中压实不够) Loss of bond between aggregate particles and the asphalt binder as a result of:  A dust coating on the aggregate particles that forces the asphalt binder to bond with the dust rather than the aggregate.  Aggregate Segregation.  Inadequate compaction during construction.
  • 松散 Raveling 病害处治 Cures  局部修补(挖除和修补 ) Localized patching (Remove the raveled pavement and patch)  雾封层 Fog seal  碎石封层 Seal coat or Double chip seal  稀浆封层 Slurry seal  微表处 Micro Surfacing  热拌沥青混合料薄层罩面 Thin hot-mix overlay
  • 填补病害和坑槽 Patching and Potholes 类型 Types  填补恶化 Patch Deterioration  坑槽 Potholes
  • 填补恶化 Patch Deterioration
  • 填补恶化 Patch Deterioration 可能的原因 Possible Causes  填补材料与原路面粘结差 Poor bonding to existing pavement  不正确的压实 Improper compaction  填补材料差 Poor patching materials  原始病害的蔓延 Propagation of original distress 病害处治 Cures  修补(挖除和修补 ) Patching (Remove and patch)
  • 坑槽 Potholes
  • 坑槽 Potholes 可能的原因 Possible Causes  裂缝松散 Raveling of cracks  水损害 Moisture damage  冻融 Freeze-thaw  强度不足 Insufficient strength 病害处治 Cures  修补 Patching
  • 其它病害 Miscellaneous Distresses 类型 Types  行车道至路肩部分下沉 Lane-to-Shoulder Dropoff  泛水和唧浆 Water Bleeding and Pumping
  • 行车道至路肩下沉 Lane-to-Shoulder Dropoff
  • 行车道至路肩下沉 Lane-to-Shoulder Dropoff 可能的原因 Possible Causes  行车道和路肩的材料有差别 Differences in materials used for lane and shoulder .  不均匀沉降 Differential settlement  基层压实不足 Insufficient compaction of base 病害处治 Cures  铺设调平层 leveling overlay  微表处 Micro-surfacing
  • 泛水和唧浆 Water Bleeding and Pumping
  • 泛水和唧浆 Water Bleeding and Pumping 可能的原因 Possible Causes  裂缝 Cracks  排水不足 Inadequate drainage 病害处治 Cures  全深式修补 Full-depth patch  裂缝填封 Crack seal
  • Thank You 13909265848 l.tj@163.com Sun Jianxi