Transcript 7 th International DUT-workshop on Design and performance
Feedback on: - 11 th international symposium on concrete roads, Seville, and - 7 th International DUT-workshop on Design and performance of sustainabe and durable concrete pavements, Prepared for presentation at the 20 th meeting of the Roads Pavements Forum (RPF), CSIR ICC, 10 November 2010 Erik Denneman
7 th DUT workshop • • • • • Carmona 33 participants (usual suspects), Two days presentations and discussion 31 papers, two from SA Session topics: • Materials • • • Design of concrete pavements Concrete pavement performance Innovative concrete pavement structures Slide 2 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Modular pavements (rehabilitation and repair) Slide 3 Buch et al 2010 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Modular pavements (continued) Buch et al 2010 Slide 4 Tayabji et al 2010 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Innovative solutions Perrie et al 2010 Slide 5 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Innovative solutions Lechner, 2010 Slide 6 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Sustainability: • Feedback on international conference on sustainable concrete pavements • • Subbase design and the need for maintenance (Zollinger et al), Silverbrand, three layer concrete pavement Slide 7 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Fracture mechanics • 5 papers on the need for and use of fracture mechanics in concrete pavement design Roesler et al, 2010 Thompson et al, 2010 Slide 8 © CSIR 2006 www.csir.co.za
7 th DUT workshop, main themes: • Size effect: 3 papers 20 18 16 14 TPB Experimental data FPB Experimental data 12 10 8 0 50 100
h-a [mm]
150 200 Slide 9 Denneman et al, 2010 250
• • • • • 11th international symposium on concrete roads, Seville 108 papers, from 22 countries, Three days of presentations Excursions Two papers from SA One honorary membership Slide 10 © CSIR 2006 www.csir.co.za
Honorary ISCP membership for Louis Marais Slide 11 © CSIR 2006 www.csir.co.za
SA Delegation Slide 12 © CSIR 2006 www.csir.co.za
Conference themes • •
Theme 1 Pavement design-planning evaluation
• Decision support systems • Life cycle cost • Evaluation techniques • Long-life pavements • Standards & specifications Wathe, 2010 Slide 13 © CSIR 2006 www.csir.co.za
Conference themes Scofield et al, 2010 • •
Theme 2 Sustainable construction
• Environmental-friendly pavements • Low CO 2 • Fuel consumption • Recycling • Heat island effect – Albedo • Safety – skid resistance • Low noise • Reduction hindrance to users • Energy considerations • Composite pavements • Permeable pavements • Climate change • Pollution reductions © CSIR 2006 www.csir.co.za
Smits et al 2010
Conference themes • • •
Theme 3 Techniques for good maintenance, repair & rehabilitation
• Fast-track, early opening •
(Ultra)(Thin) white topping (7 papers!)
• Overlays-inlays • Precast slabs Slide 15 © CSIR 2006 www.csir.co.za
Conference themes • • •
Theme 3 Techniques for good maintenance, repair & rehabilitation
• Fast-track, early opening •
(Ultra)(Thin) white topping (7 papers!)
• Overlays-inlays • Precast slabs Schmidt et al 2010 Slide 16 © CSIR 2006 www.csir.co.za
Conference themes Burger et al 2010 Slide 17 © CSIR 2006 www.csir.co.za
Conference themes Louw et al 2010 Slide 18 © CSIR 2006 www.csir.co.za
Conference themes •
Theme 4 Alternative & special applications
• • Tunnel & bridge pavements • Bus & tram • Airports • Industrial pavements • Aesthetical concrete • Concrete safety barriers • Ports-harbours • Cycle tracks • New materials (Ultra high performance concrete (UHPC)) • Innovative pavements • •
Treatment and recycling of materials
De Larrard et al 2010 Slide 19 © CSIR 2006 www.csir.co.za