Epoxy Asphalt paving for long span bridges in China has been in use since 2000. ChemCo Systems Epoxy Asphalt has shown to be the most durable pavement on orthotropic steel decks which are typical design elements of long span bridges.
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Epoxy Asphalt Success in China on Long Span Bridges
1. 为何环氧沥青铺装技术
能够在中国成功?
For ORTHOTROPIC STEEL BRIDGE DECKS
正交异性钢桥面鋪裝工程
ChemCo Systems
2. ? NORTHERN EUROPE 1950
北欧 1950
? NORTH AMERICA 1964
北美 1964
? ASIA 1979
亚洲 1979
3. ? Paved with EA in 1967 1967年鋪裝
? Excellent condition after 46 Years 使用46年後依然完好
6. ? Most Severe in Hot Weather
? 鋪裝问题在炎热天气下最为严重
? Most Frequent = Cracks Over Longitudinal
Stiffeners
? 最常见的是纵向加勁肋表面的裂纹
? Cracks Lead to Dis-Bonding
? 裂纹导致鋪裝剥离
19. ? Asphalt, SMA, Gussasphalt are “Thermoplastics.”
Will Melt !
? 普通沥青、粗石膠泥沥青 (SMA)、澆注式幼石膠泥沥青
(Gussasphalt) 都屬於“热塑”性,在高温中會融化。
? Epoxy Asphalt is “Thermoset.”
? Will Not Melt !
? 环氧沥青為“热固化”物。
? 在極端高温中也不会融化。
20. ? Epoxy Asphalt has:
? Higher Strength/Stability
? Better Stiffness over Temperature Range
? Better Resistance to Creep/Flow
? Better Adhesion
? 环氧沥青擁有:
– 较高的强度和稳度
– 應用温度范围内較好的刚度
– 較好的抗蠕变和抗流動性能
– 較好的黏性
21. Higher Strength/Stability
较高的强度和稳度
? Greater than Four Times Stability of Asphalt
Concrete
与其他沥青混凝土相比环氧沥青拥有4倍以上的稳度
? Withstands Higher Overloads without Damage
可承受較高的超载量亦無损坏
? Does Not Rut or Shove
抗车辙或推挤
22. Flexural Flexural
Strength Modulus
弯曲强度 弯曲模量
MPa MPa
Modified Asphalt
改性沥青 5.95 563
SMA
粗石膠泥沥青 4.73 355
Epoxy Asphalt
环氧沥青 16.4 2574
HUANG Wei, QIAN Zhendong, CHEN Gang & YANG Jun
Chinese Science Bulletin 2003 Vol. 48 No. 21 23912394
23. Transition?Layer Surface?Layer Depth?– mm
过渡层 表层 深度‐mm
25?mm?Epoxy?Asphalt 25?mm?Epoxy?Asphalt 0.32
25 mm?环氧沥青 25 mm?环氧沥青
20‐25?mm?Gussasphalt 35‐40?mm?Epoxy?Asphalt 0.34
20‐25 mm 浇注式膠泥沥青 35‐40 mm?环氧沥青
25?mm?Epoxy?Asphalt 30‐40 mm SMA 0.74
25 mm?环氧沥青 30‐40 mm SMA(粗石膠泥沥
青)
30?mm?SMA 35?mm?SMA 1.05
30 mm?SMA(粗石膠泥沥 35 mm?SMA(粗石膠泥沥
青) 青)
20‐30?mm?Gussasphalt 35‐40?mm SMA 1.74
20‐30 mm?浇注式膠泥沥青 35‐40?mm SMA(粗石膠泥沥
青)
30?mm?Gussasphalt 40?mm?Gussasphalt 3.58
30 mm?浇注式膠泥沥青 40 mm 浇注式膠泥沥青
Li Xuelian, Zhou Zhigang, Key Laboratory of Highway Engineering, Changsha University of Science & Technology
24. Better Stiffness
較好的刚度
? Less Softening as Temperature Increases
? 温度升高时抗软化性能较高
? Reduces Deflection of Deck
– Increases Fatigue Life of Steel Deck System
? 减少桥板的负荷挠度
–提高钢桥面板系统的疲劳寿命
25. BETTER RESISTANCE TO CREEP/FLOW
优点:較佳的抗蠕变抗流動性能
? Much More Elastomeric
? Better Fatigue Life
? No Permanent Deformation under High Loads
– Reduced Damage by Slow Moving or Stopped
Overloaded Trucks
?較高的伸弹性
? 較佳的疲劳寿命
? 高负荷下不會引至永久的变形
–减少因慢速或停止的重载卡车荷压的破坏
27. ? Type V– Standard Epoxy Asphalt
V型环氧沥青是現代的廣用產品
? 12 mm Plate with 300 mm Wide Stiffeners on 600 mm
Centers
组合梁尺寸:鋼板厚12mm,加勁肋寬300mm,中綫間距為600mm
? Conducted at 0, 18, 60 deg C
实验环境氣温:0℃,18℃,60℃
? 10 Hz Frequency
荷载频率:10 赫兹
? Normal Load & Overload
正常和超载的条件下
? NO FAILURE @12 Million Cycles
在一千二百万次的重复周期後無破壞
28. ? Type IX – New Generation Epoxy Asphalt
IX型环氧沥青是新一代的改善品
? 12 mm Plate with 300 mm Wide Stiffeners on 600 mm
Centers
组合梁尺寸:鋼板厚12mm,加勁肋寬300mm,中綫間距為600mm
? Conducted at 21 deg C
实验环境氣温:21℃
? 10 Hz Frequency
荷载频率:10 赫兹
? Normal Load & Overload
正常和超载的条件下
? NO FAILURE @ >22 Million Cycles
在超過二千二百万次的重复周期後無破壞
30. ?ChemCo Bond Coat Type 1f
?Pull-Off Adhesion 2.4 MPa @ 70? C
?Negligible slippage at bond line assures
composite action
?No Delamination
?美國化学系统公司提供“1f”型膠黏塗层
?攝氏70度下的粘层拉断强度達 2.4兆帕
?膠黏层只有微不足道的滑移,确保综合行动
?無分层现象出現