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Asphaltic Joint Plug
Asphaltic plug joint (APJ) is a type of asphalt-filled bridge expansion joint, it is ideal for small to medium-span bridges. For spans with 20mm-40mm expansion. It involves melting asphalitc joint plug, pouring it into heated crushed stones, forming the joint. Crushed stones support loads, and it meets expansion requirements at 25°C to 60°C.
Why Choose Our Asphaltic Joint Plug
Temperature Resilience
Maintains integrity in diverse temperatures, resisting softening or cracking.
Strong Adhesion
Ensures robust bonding to bridge structures, accommodating movements.
Cost-Effective
Competitive pricing with superior quality compared to European and American brands.
Exceptional Elasticity
Seamlessly integrates joints with minimal noise during movement.
Application & Structure
1. Application range
It is suitable for highway bridges, urban overpasses, and viaducts with an expansion range below 50mm, designed for regions with temperatures ranging from -25°C to 60°C.
- Small and medium bridges with movement less than 4cm (±2cm)
- Medium bridge with the span of 30m-100m
- Small bridges with the span of 8m-30m
- The slope of the bridge deck is less than 30 degrees (if the traffic volume is not large, the slope can reach 45 degrees)
- Bridgehead
2. Structural Dimensions
| Movement △B | Slot width B | Slot depth H | Gap b2 | Steel plate b1xh |
|---|---|---|---|---|
| 10 | 200 | 60 | 20 | 120×6 |
| 20 | 300 | 60 | 20 | 140×6 |
| 30 | 400 | 60 | 30 | 160×6 |
| 40 | 500 | 60 | 40 | 180×6 |
| 45 | 600 | 60 | 40 | 200×6 |
| 50 | 700 | 60 | 40 | 220×6 |
| Movimiento(mm) | Brecha LxH (mm) | Cantidad por metro lineal | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cubierta de acero (mm) | Piedra(m2) | APJ (kg) | Adhesivo (kg) | Placa de espuma (pcs) | Clavos(pcs) | Ancla (m) | Perno de expansión (pcs) | ||
| 10 | 200×60 | 120×6 | 0.012 | 7.92 | 0.10 | 1000 | 4 | 2 | 8 |
| 20 | 300×60 | 140×6 | 0.018 | 11.88 | 0.13 | 1000 | 4 | 2 | 8 |
| 30 | 400×60 | 160×6 | 0.032 | 21.12 | 0.17 | 1000 | 4 | 2 | 8 |
| 40 | 500×60 | 180×6 | 0.040 | 26.40 | 0.20 | 1000 | 4 | 2 | 8 |
| 45 | 600×60 | 220×6 | 0.048 | 31.68 | 0.23 | 1000 | 4 | 2 | 8 |
| 50 | 700×60 | 220×6 | 0.056 | 36.96 | 0.26 | 1000 | 4 | 2 | 8 |
Material Performance Parameters
1. Elastomeric Binder
The modified elastomeric binder shall meet or exceed the requirements of ASTM-3405 and ASTM-1190.
| PROPERTIES | STANDARD | REQUIREMENTS |
|---|---|---|
| Softening point, min | ASTM D36 | 100℃ |
| Tensile adhesion, min. | ASTM D5329 | 700% |
| Ductility min. at 25°C | ASTM D113 | 400mm |
| Penetration, max. at 25°C 150g, 5s | ASTM D5329 | 75mm |
| Low temperature penetration, min. at -18°C 200g, 60s | 9.1 | 1.0mm |
| Flow, max. 5h at 60°C | ASTM D5329 | 3.0mm |
| Resiliency, min. – max. at 25°C | ASTM D5329 | 40-60% |
| Asphalt compatibility | ASTM D5329 | Pass |
| Recommended application heating temperature range | ASTM D5329 | 180℃-230℃ |
| Bond 3 Cycles at -7°C 100% Elongation | ASTM D405 | Pass |
| Flexibility, at -23°C | ASTM D5329 | Pass |
2. Aggregate
The stone material should be angular and consist of hard crushed limestone gravel with good embeddability, with a maximum crushing value of 30%. Flat and elongated stone content should be less than 15%-20%. The stones must undergo heating at temperatures between 100°C and 150°C.
Stone Specifications:
Stone Specifications:
- Base Layer: 20mm-40mm
- Surface Layer: 5mm-10mm
Feature
- Seamless bridges offer stable, comfortable driving with easy maintenance.
- Simple joint construction allows rapid traffic opening within hours of cooling.
- Elastic joints absorb vibrations and deformation for versatile use, reducing bridge load by 20%.
- Integrated joints provide excellent sealing and corrosion resistance, ensuring a lifespan of over 30 years.
- Partial construction during joint replacement minimizes traffic disruption, reducing closure time by 50%.
- Cost-effective, with a 30% lower initial cost, and offer significant long-term benefits.
Accessories & Package
Accessories include: Location Pins, Foam, Steel Plate cover, Binder
Package: 20kg carton on pallets, or customized
Package: 20kg carton on pallets, or customized
Installation
1. Cut, groove, and clean the slot according to the design dimensions.
2. Backfill the slot with steel fiber concrete, compact, and level it.
3. After concrete strength reaches 70% of the design strength, embed anchor screws in drilled holes at 250mm intervals. Install a longitudinal connecting steel bar and fit the joint cover plates.
4. Thoroughly clean the slot of sand, debris, and dust. Dry the slot.
5. Ensure complete dryness in the slot area, cover both sides of the pavement with isolation film, and uniformly apply Asphaltic Joint Plug-specific adhesive to the slot’s bottom and sides.
6. Clean and heat stones, preferably using a flame jet in a stone heating machine, at a temperature of 130°C to 150°C.
7. Heat the Asphaltic Joint Plug-specific adhesive to a temperature of 190°C to 210°C, quickly mix it in the correct proportion, and pour it into the heated and dried stones, stirring evenly.
8. Quickly place the heated and stirred Asphaltic Joint Plug crushed stone adhesive in the slot and immediately flatten it with a special milling plate.
9. After flattening, evenly spray a layer of Asphaltic Joint Plug-specific bonding solution on the surface of the crushed stone, quickly scrape it flat, meeting smoothness requirements.
10. Clean the construction site and close traffic.
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