What do you mean by high performance concrete?
High-performance concrete (HPC) is concrete that has been designed to be more durable and, if necessary, stronger than conventional concrete.
What is the importance of high performance concrete?
There are several advantages of high performance concrete (HPC) application in building construction which are not achievable using conventional concrete. The strength, durability, resistance to chemical attack, and workability of high performance concrete are high.
What are the properties of high performance concrete?
Features of High-Performance Concrete
- Compressive strength > 80 MPa ,even up to 800 MPa.
- High-performance concrete is quite brittle but the introduction of fibers and can improve ductility.
- High durability.
- Water binder ratio (0.25-0.35), therefore very little free water.
- Reduced flocculation of cement grains.
What is high performance concrete made of?
Ultra-high-performance-concrete (UHPC) is generally defined as concrete with a compressive strength greater than 150 MPa. UHPC typically is made with high-strength steel fibers, fine sand, cement, fly ash, a large volume of SF, and a low amount of water (a w/cm ratio less than 0.20).
What is a performance concrete?
Ultra-High Performance Concrete (UHPC) is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square inch (120 MPa) with specified durability, tensile ductility and toughness requirements; fibers are generally included in the mixture to achieve specified requirements …
Who invented high performance concrete?
Ultra-high-performance concrete (UHPC) was first introduced as reactive powder concrete (RPC) in the early 1990s by employees of the French contractor Bouygues.
What is the compressive strength of high performance concrete?
What are the limitations of high performance concrete?
Ultra-high performance concrete (UHPC) has superior mechanical properties and durability to normal strength concrete. However, the high amount of cement, high environmental impact, and initial cost are regarded as disadvantages, restricting its wider application.
What is the difference between high performance concrete and high-strength concrete?
High-strength concrete is defined based on its compressive strength at a given age whereas high-performance concrete is defined based on performance criteria namely: high durability, high strength, and high workability.
Where is high performance concrete used?
The high-performance concrete has been used in the construction of bridges, hydropower structures, pavements, bridges, high-density radiation shielding, mass concrete projects, offshore platforms noise and vibration dampening, tunnels, and high-rise structures.
What is high performance concrete Slideshare?
High performance concrete is a concrete in which certain characteristics are developed for a particular application and environment, so that it will give excellent performance in the structure in which it will be placed.
When was high performance concrete invented?
UHPC was officially coined in 1994, and soon after was used in applications in North America. The U.S. Army Corps of Engineers first used UHPC in the 1980s, though UHPC did not become commercially available in the U.S. until 2000. However, in 1997 it was first used on a bridge in Quebec, Canada.