Concrete roads in South-Korea: state of the art & new developments

1. Concrete roads in South-Korea: state of the art & new developments Luc Rens FEBELCEM

2. Content of my presentation • The South-Korean Road network • TC D2 Road Pavements • WG3 Reducing the carbon footprint • References to concrete pavements : 2-layered concrete roads • Technical Visit to Seoul Beltway including the Sapaesan Tunnel • Workshop on concrete pavements for Korean experts BUT ALSO... • The Korean War • Buddhist temples • Conflict resolution • ...

3. The Korean War, 1950-1953 • Between North- and South-Korea • 22 countries united under United Nations • 3171 Belgian and Luxemburg soldiers went to Korea • Losses in the Belgium-Luxemburg Batallion (including South-Korean soldiers) : • Killed in action: 101 Belgians - 2 Luxemburgers and 9 S-Korean soldiers • Missing in action : 5 Belgians • Wounded : 478 Belgians • ...the development of the South-Korean road network started mainly after the war

4. The South-Korean road network • Source : presentation during PIARC seminar in 2009 by :

5. The South-Korean road network • Comparison of pavement types

6. The South-Korean road network • Construction practice for concrete roads

7. TC D2 Road Pavements • WG3 : Reducing carbon footprint of pavements • Contributions from concrete pavements : • Use of blended cements (BE : CEM III/A) • 2-layered concrete with recycled aggregates in the lower layer • BUT : - only gain in CO2 is from reduced transport - only for JPCP (concrete slabs), bad experience with CRCP+recycled aggregates

8. TC D2 Road Pavements • Presentation by Mr. Mario Krmek from ASFINAG, Austria’s motorway operator • Standard solution for motorways in Austria : • 2-layered JPCP with recycled aggregates in the lower layer • Top layer in exposed aggregate concrete, Dmax = 8 or 11 mm

9. Technical Visit to SEOUL BELTWAY

10. Technical Visit to SEOUL BELTWAY • Total length: 128 km • Private section: 36,3 km : managed by Seoul Beltway Corporation • KEC section: 91,7 km

11. Technical Visit to SEOUL BELTWAY • Private part • Build – Transfer – Operate • 36,3 km (2way – 8 lanes) • 6 Tunnels (12.0 km) - 55 Bridges (9.0 km) • 6 Interchanges – 7 Tollgates • Construction period : June 2001 – December 2007 • Project period : June 2006 – June 2036 (30 years) • Total cost : US$ 1 985 M

12. Technical Visit to SEOUL BELTWAY 7% of Heavy Goods Vehicles

13. Technical Visit to SEOUL BELTWAY • Sapaesan Tunnel • Length 3997 m (2x4 lanes)

14. Technical Visit to SEOUL BELTWAY • Severe opposition against construction of the SAPAESAN TUNNEL from : • Environmental groups (damage to the ecosystem caused by decline of ground water level,…) • Buddhist Community (noise, shocks and dust at the construction site disrupt pratice nearby temples)-

15. Technical Visit to SEOUL BELTWAY

16. Workshop for Korean experts • Organised by Mr. Han Sueng-Han, chairman of TC D2 • Attended by 45 people, mainly engineers from the Ministry of Land, Infrastructure and Transport, the Korean Expressway Corporation, the Korea Institute of Civil Engineering and Building Technology, Korean universities and industry stakeholders. • BE contributions • 1 particular presentation on an innovative application of sprayed cellular concrete for the toplayer of a 2-layered concrete pavement

17. Innovation : cellular sprayed concrete for the toplayer of 2-layered concrete pavements

18. Innovation : cellular sprayed concrete for the toplayer of 2-layered concrete pavements

19. Innovation : cellular sprayed concrete for the toplayer of 2-layered concrete pavements

20. Innovation : cellular sprayed concrete for the toplayer of 2-layered concrete pavements

21. Conclusions • The WRC was a worthwile event • Field trips are important,... concrete too  • Thanks to all of the colleagues for the nice company and the great experiences • Hope seeing you in 4 years : 6th – 10th October 2019?