Download as PDF, PPTX
Uploaded byInstituto del cemento y Hormigón de Chile
Seminario Internacional Construcción y Rehabilitación con Pavimentos de Hormigón Innovations in Concrete Pavement Construction
The document discusses innovations in concrete pavement construction, including stringless paving. Stringless paving uses electronic guidance systems instead of stringlines to control elevation and steering of paving machines. This reduces errors and improves smoothness. The document describes the components of stringless systems, including total station or GPS control, and how they communicate. It also discusses advancements in pavement construction equipment and the future of integrating technologies. Finally, it covers the economics of pavement selection and how life-cycle cost analysis (LCCA) and life-cycle assessment (LCA) are important factors to consider.
More Related Content
Similar to Seminario Internacional Construcción y Rehabilitación con Pavimentos de Hormigón Innovations in Concrete Pavement Construction
More from Instituto del cemento y Hormigón de Chile
Seminario Internacional Construcción y Rehabilitación con Pavimentos de Hormigón Innovations in Concrete Pavement Construction
- 1. Innovations and Pavement-Type Selection Topics RobertRodden, P.E. www.robertrodden.com 5/25/2015 1 ConstructionandRehabilitationof ConcretePavements
- 2. Stringless Paving Innovations inConcrete Pavement Construction 5/25/2015 2 ConstructionandRehabilitationof ConcretePavements
- 3. FREE Stringless PavingTraining! • Available around the clock, 365 days per year. • No cost to par;cipants. • Cer;ficates of comple;on may count toward a total of 11.0 professional development hours (PDHs). 5/25/2015 ConstructionandRehabilitationof ConcretePavements 3 www.acpa.org/self-paced-online-courses/
- 4. What is StringlessPaving? § Alternative to conventional stringline paving. § Uses electronic guidance systems to replace pins, sensors, and “stringline.” § Electronic guidance system controls elevation and steering of the paving machine(s). § Sometimes referred to as 3D paving. 5/25/2015 ConstructionandRehabilitationof ConcretePavements 4
- 5. Some of theBenefits of Stringless Paving • Eliminates labor intensive stringline surveying for hubs and stakes. • Reduces opportunities to introduce surveying errors. • Reduces overall preparation time on the grade. • Places engineer’s design directly into machine(s). • Controls elevation, slope, and steer of machines with truer input. • Reduces or eliminates cords created by stringline hubs/pins. • Reduces wave patterns introduced by improperly tensioned stringline sensors. • Increases phasing and traffic control pattern considerations. 5/25/2015 ConstructionandRehabilitationof ConcretePavements 5
- 6.
- 7.
- 8. Stringless Technology Extends BeyondPaving 5/25/2015 ConstructionandRehabilitationof ConcretePavements 8
- 9. Two Most CommonStringless Systems in Use Today Total Station Control GPS + Laser Control 5/25/2015 9 ConstructionandRehabilitationof ConcretePavements
- 10. Stringless Components • Inthe Field: § Control Points. § Instruments (Robotic Total Stations, GPS Base Station or Lasers). § Radios. 5/25/2015 ConstructionandRehabilitationof ConcretePavements 10 • On the Machine: § Computer & Software. § Dual Axis Slope Sensors. § Masts. § If Using Total Station Control: – Radios – 360o Prisms § If Using GPS Control: – GPS Receiver § If Using Laser Control: – Laser Receiver
- 11. How the ComponentsTalk to One Another – All components networked together on CANBus. – “Internet for machines” – Each message has unique ID so only the component that needs it will read it. 5/25/2015 ConstructionandRehabilitationof ConcretePavements 11 CANBus
- 12. Bringing the ComponentsTogether 5/25/2015 ConstructionandRehabilitationof ConcretePavements 12 Benchmark Control Points (Hubs) Robotic Total Station Radio on Total Station Radio on Equipment 360o Prism on Equipment 3D Model On-Board Stringless Computer Machine Control Computer Equipment Hydraulics Dual Axis Slope Sensor
- 13.
- 14. Equipment Advancements Innovations in ConcretePavement Construction 5/25/2015 14 ConstructionandRehabilitationof ConcretePavements
- 15.
- 16. But Some ThingsStill Look Familiar 5/25/2015 ConstructionandRehabilitationof ConcretePavements 16
- 17.
- 18.
- 19.
- 20.
- 21. Future of Construction • Stringless/GPSintegration into joint layout and sawing operations? • Saw + seal in one single operation? • Manufacturers don’t reveal new ideas until patents are filed and its ready… 5/25/2015 ConstructionandRehabilitationof ConcretePavements 21
- 22. The Economics of Pavements Life-CycleCost Analysis (LCCA) 5/25/2015 22 ConstructionandRehabilitationof ConcretePavements
- 23. Decision Points in PavementType Selection • Historically, initial cost has driven pavement type selection • Other factors are increasingly important, but cost is still king 5/25/2015 ConstructionandRehabilitationof ConcretePavements 23 COST Sustainability Safety User Experience
- 24. Concrete has aLower Inflation Rate 5/25/2015 ConstructionandRehabilitationof ConcretePavements 24Source: ACPA EB011, Life Cycle Costs Analysis Oil and Asphalt Import/Export Practices and Refining Processes Impact This On a Local Level! In Many Areas, Concrete Can Now Compete On Initial Cost Alone!
- 25. Concrete Pavements areEXPECTED to Last Longer by Owners 5/25/2015 ConstructionandRehabilitationof ConcretePavements 25
- 26. Life-Cycle Costs Accountsfor This 5/25/2015 ConstructionandRehabilitationof ConcretePavements 26 CONCRETE ASPHALT REAL-WORLDCASE FOREXAMPLEPURPOSESONLY
- 27. Failure to Accountfor LCCA is Shortsighted 5/25/2015 ConstructionandRehabilitationof ConcretePavements 27Asphalt prices have increased more since these plots
- 28. LCCA Guidance in Spanish! • Translated by: • Soon available through: 5/25/2015 ConstructionandRehabilitationof ConcretePavements 28
- 29. Competition Pays Dividendsto the Owner (and TAXPAYERS) • A complex relationship exists between number of bidders, volume of market, unit price of materials, etc. • However, there is a clear trend of lower prices for both pavements with increasing levels of competition • Variability in unit prices also decreases with increasing competition • Owners can purchase more pavements with the same investment! 5/25/2015 ConstructionandRehabilitationof ConcretePavements 29 http://competitionpaves.org/wp- content/uploads/2014/11/ PavementTypeSelection-ISCR- Prague.pdf
- 30. Sustainability of Pavements Life-Cycle Assessment(LCA) 5/25/2015 30 ConstructionandRehabilitationof ConcretePavements
- 31. Life-Cycle Assessment (LCA) 5/25/2015 ConstructionandRehabilitationof ConcretePavements 31 • Quantifies CO2 and other environmental impacts of a specific pavement section in a specific location similar to how LCCA does $ • The end result is extremely dependent on: – Pavement section, cut/fill, etc. – Materials used, recycled content, by-product usage, hauling distance, etc. – Use phase: color of surface can impact lighting, rigidity of the surface impacts fuel usage, etc. • There is no GENERAL answer to this!
- 32.