ENUO EBJ 200 asphalt concrete building bridge expansion joint
1. Overview of ENUO EBJ 200 asphalt concrete building bridge expansion joint
ENUO EBJ 200 asphalt concrete building bridge expansion joint is an expansion installation set between two beam ends, the beam end and abutment, or on the joint position of bridge to meet the requirements of bridge deformation. Seamless bridge expansion joint is a kind of bitumen-filled joints originated in UK in the 1970s. The technology is to replace expansion installation by paving layer of high elastic asphalt mixture. This layer can absorb bridge deck displacement caused by temperature and traffic load, and meet expansion and contraction at seasons, ensuring the surface will not crack.
2. Bridge Expansion Joint Binder
A. Binder Introduction
ENUO self-developed EBJ-200 bridge expansion joint binders are to add special additives in the original TST bridge expansion joint binder, with performance greatly improved, such as high temperature rutting resistance, low temperature crack resistance, interfacial adhesion and low temperature stress relaxation.
B. Application
EBJ-200 bridge expansion joint binders are suitable for small and medium-sized bridges with less than 50mm expansion.
Horizontal expansion: ±25MM
Vertical expansion: ±3MM
C. Technical Specifications
|
Model |
EBJ-200R |
EBJ-200G |
EBJ-200B |
|
Softening point: ℃ |
≥85 |
≥83 |
≥83 |
|
Low temperature tensile |
-0℃ pass |
-7℃ pass |
-15℃ pass |
|
Cone penetration at 25℃: dmm |
≤40 |
≤75 |
≤100 |
|
Flow value(60℃, 5h/mm) |
≤3 |
≤3 |
≤5 |
|
Elastic recovery: mm |
30~50 |
40~70 |
≥50 |
|
Tensile adhesion: % |
≥300 |
≥700 |
≥800 |
|
Ductility: mm |
≥150 |
≥400 |
≥550 |
D. Features
High softening point, low flow value; no flow at 60 ℃, with strong rutting resistance at high temperatures.
Good ductility at high temperature is better for resisting the widening of bridge joints caused by low temperature contraction.
Good low temperature interfacial adhesion. Due to special additives, EBJ-200 binders offer better adhesion because of the physical riveting and chemical cross linking with bridge interfaces.
High elastic recovery can better meet the bridge expansion and contraction.
3. Construction Technology
A. Equipment
|
Equipments |
Usage |
|
Cutter |
Cut the parts to be slotted |
|
Melter |
Melt DB binders |
|
Fried stone machine |
Heat aggregate |
|
Generator |
Provide power to melter and fried stone machine |
|
Plate compactor |
Compact mixture |
|
Compressor |
Clear up dust and debris |
|
Heat lance |
Dry the slot |
|
Infrared digital thermometer |
Test the temperatures of procedures |
|
Hammer breaking |
Clear up bridge |
B. Materials
|
Materials |
Remarks |
|
Binders |
DB binders |
|
Aggregate |
Polygonal or cubic granite and basalt with diameter 15 to 20mm |
|
Carbon steel plate |
Thickness 3 to 12mm, length 1m, width 17.5 to 30cm, drill 4mm screw holes along the centerline every 30cm |
|
210 degree heat resistant rubber sponge backing strip |
210 degree heat resistant rubber sponge backing strip |
|
Nails |
Electroplating 16D common nails |
4. Technology advances
5.1 Maintenance-free: do not need regular clean of debris in joints like in steel joints, reduce maintenance cost;
5.2 Lane by lane application is available: avoid blocking traffic;
5.3 Nice and practical: integration with the road after the completion, smooth ride, no bump, no noise;
5.4 Good waterproof effect: can effectively prevent water-based salt damaging the joint;
5.5 Quick construction and fast traffic opening: 10 workers can complete 20 meter in eight hours; open to the traffic in 1 hours in cold area, and 2 hours in hot area;
5.6 Easy to maintain: only need to replace the damaged part of the bridge expansion joint;
5.7 Long service life: up to 5-8 years.
5 Notes
6.1 Ambient temperature for construction: must be higher than 10 ℃;
6.2 Base formation for construction must be dry and dust free;
6.3 Temperature of binders should be 180 to 195℃, and heat times cannot be more than 3 times.
Road Maintenance Material Customer Cases
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