high performance concrete


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high performance concrete

  1. 1. High performance concrete bridges<br />
  2. 2. introduction<br /><ul><li>HPC is made with some basic ingredients but has totally different microstructure than ordinary concrete
  3. 3. HPC is an engineered concrete obtained through a careful selection
  4. 4. The low water/binder ratio of HPC that is its universal characteristics
  5. 5. It has very dense microstructure having a very fine and more or less well connected capillary system
  6. 6. Dense microstructure of HPC makes the migration of aggressive environmental conditions.</li></li></ul><li>100 yearold bridge<br /><ul><li>Lake alvord bridge is the the first reinforced concrete bridge in america
  7. 7. It was built in 1889 by ernest l. Ransome
  8. 8. It is the entrance to san francisco's golden gate park
  9. 9. The bridge was constructed as a single arch 64-feet wide with a 20-foot span.
  10. 10. Survived the 1906 earthquake and fire</li></li></ul><li>Ncbc&hpc bridges<br /><ul><li>National Concrete Bridge Council (NCBC) promotes these bridges because of speed construction, strength and durability and provides great looks
  11. 11. Segments for the bridge's superstructure were cast using eight casting beds along the project site</li></li></ul><li>Advantages of HPC bridges<br /><ul><li>COMPETITIVENESS
  12. 12. Value&Quality
  13. 13. Construction efficiency
  14. 14. Economic Impact
  15. 15. AESTHETICS
  16. 16. Provides architectural distinction
  17. 17. Distinguishes the community.
  18. 18. Promotes economic development and tourism
  19. 19. COST SAVINGS</li></ul>Minimizes maintenance<br />Reduces inspections<br />Affords longer lengths <br />Extends service life<br /><ul><li>DURABILITY</li></ul>Resistant to harsh elements <br />Friendly to the environment <br />Daptable to requirements <br />
  20. 20. Disadvantages of bridges using hpc<br /><ul><li>Minor vibrations, transmitted from the equipments during repairing activity
  21. 21. Stresses resulting in debond of the repair mortar
  22. 22. CAN present in the core of concrete which was not apparently visible </li></li></ul><li>Amazing<br /> constructions<br />
  23. 23. Happy hollow bridge, tennesse, usa<br />Jointless design (new design)<br />
  24. 24. <ul><li>Hoover dam bypass bridge- acrossColorado river, America</li></li></ul><li>Icon federation bridge, canada built in early 80’s<br />
  25. 25. Sunshine skyway bridge, florida<br />Completed in 1987<br />Length- 4.2 miles <br />
  26. 26. SAGADAHOC BRIDGE, usa across the Kennebec River. completed in 2000<br />
  27. 27. conclusion<br /><ul><li>These bridges are the bridges of 21st century
  28. 28. HPC bridges are the trade mark in civil engineering
  29. 29. HPC bridges provides efficient designs longer spans, fewer beams, and shallower structural depths
  30. 30. High performance, faster construction, reduced maintenance, longer service life, and low cost
  31. 31. It can be made with in few years.so it can meet traffic and environmental is with a low life-cycle costs.</li></li></ul><li>Future expansion<br /><ul><li>High Performance Fiber Reinforced Concrete (HPFRC) Can be used to built super structure bridges
  32. 32. This is just a slight modification pakage of HPC
  33. 33. This can with stand huge earth quicks and other natural disasters
  34. 34. A new kind of concrete called Ductal is now in manufacturing process</li></li></ul><li>Thankyou<br />