high performance concrete
Post on 20-May-2015
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High performance concrete bridges
introduction
• HPC is made with some basic ingredients but has totally different microstructure than ordinary concrete
• HPC is an engineered concrete obtained through a careful selection
• The low water/binder ratio of HPC that is its universal characteristics
• It has very dense microstructure having a very fine and more or less well connected capillary system
• Dense microstructure of HPC makes the migration of aggressive environmental conditions.
100 year old bridge
Lake alvord bridge is the the first reinforced concrete bridge in america
It was built in 1889 by ernest l. Ransome
It is the entrance to san francisco's golden gate park
The bridge was constructed as a single arch 64-feet wide with a 20-foot span.
Survived the 1906 earthquake and fire
Ncbc&hpc bridges
National Concrete Bridge Council (NCBC) promotes these bridges because of speed construction, strength and durability and provides great looks
Segments for the bridge's superstructure were cast using eight casting beds along the project site
Advantages of HPC bridges
COST SAVINGS• Minimizes maintenance• Reduces inspections• Affords longer lengths • Extends service life DURABILITY• Resistant to harsh elements • Friendly to the environment • Daptable to requirements
COMPETITIVENESS• Value&Quality• Construction efficiency• Economic Impact
AESTHETICS• Provides architectural
distinction• Distinguishes the community.• Promotes economic
development and tourism
Disadvantages of bridges using hpc
Minor vibrations, transmitted from the equipments during repairing activity
Stresses resulting in debond of the repair mortar
CAN present in the core of concrete which was not apparently visible
Amazing constructions
Happy hollow bridge, tennesse, usa Jointless design (new design)
Hoover dam bypass bridge- across Colorado river, America
Icon federation bridge, canada built in early 80’s
Sunshine skyway bridge, floridaCompleted in 1987Length- 4.2 miles
SAGADAHOC BRIDGE, usa across the Kennebec River. completed in 2000
conclusion
These bridges are the bridges of 21st century HPC bridges are the trade mark in civil engineering HPC bridges provides efficient designs longer spans, fewer
beams, and shallower structural depths High performance, faster construction, reduced maintenance,
longer service life, and low cost It can be made with in few years.so it can meet traffic and
environmental is with a low life-cycle costs.
High Performance Fiber Reinforced Concrete (HPFRC) Can be used to built super structure bridges
This is just a slight modification pakage of HPC
This can with stand huge earth quicks and other natural disasters
A new kind of concrete called Ductal is now in manufacturing process
Future expansion
Thank you
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