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Compare the asphalt and concrete pavements
Specification Asphalt pavement Concrete pavement
Cross-section Surface layer, interim layer, substratum, subbase Concrete slab / lean concrete / subbase
Structural feature - The pavement layer supports the transport load as a whole
- The pavement thickness is designed based on the transport load and road support
- Apply large stress to the substratum or subbase
- Sensitive to the repeated load and transport load by heavy vehicles
- Support the transport load and temperature change by the concrete slab itself
- To prevent the irregular slab crack
- Install the horizontal contraction joint for every 4 - 6 meters
- Load transfer among slabs through the aggregate engagement and dowel bar
Construction - Good for agility and simplicity
- Good for the phase construction
- Require the long cure
- A lot of construction processes like the joint installation and cure
Durability - Occur the plastic deformation on the road with a lot of heavy vehicles - Good adaptability for heavy vehicles
Maintenance - Easy for partial maintenance but inhibit the transportation due to frequent maintenance
- Quick maintenance
- Require regular maintenance of the joint
- Expensive maintenance
applied road
- Good flatness and ride comfort
- Low noise
- Roads with less traffic volume, downtown roads
- Poor comfort due to the joint
- Much noise
- Road with a lot of heavy vehicles
Ēš Frequent maintenance has occurred due to the plastic deformation, crack and pothole on the asphalt pavement but the application of the process extends the asphalt pavement life to 3 to 5 times.
Ēš The concrete pavement is good for the road with a lot of heavy vehicles but it is judged good to apply the process because the pavement is difficult to apply to roads in the downtown or with a lot of traffic volume due to complaints.
Background technology (problem in existing technologies)
Product issue
- Expensive product and higher extra charge than other materials due to a lot of lap joints.
- Performance against the price (insufficient compared to the price)
Construction issues
- A lot of possibilities for problems with the tire due to the asphalt impregnation →
No risk of rolling up for the film on the top
- Add the process of melting the film, extending the tack coat cure.
1. The technology may fundamentally solve major issues of the asphalt and is considered the most proper for the project on reducing potholes by metropolitan cities like Seoul.
2. The project supplies the asphalt rehabilitation with excellent performance (crack resistance, plastic deformation resistance, etc.) and low price to secure the comfort drive for roads nationwide.
3. Recently, highways have been mainly designed and constructed with the concrete for several years but the frequent asphalt maintenance largely increases the time and cost for the maintenance, shifting the trend to the asphalt construction with rapid constructibility and low price.
4. More than 400 billion KRW have been spent for the maintenance of pavement roads nationwide and the application of the process maintains or saves the maintenance cost.