Sunday, 11 March 2018

High Performance Concrete (HPC)

High Performance Concrete (HPC)      

The term High Performance concrete is used for concrete mixture which possess workability, high strength, high modulus of elasticity, high density , high dimensional stability, low permeability and resistance to chemical attack.

 High performance concrete contains the following ingredients:

a) Good quality of aggregates
b) Ordinary Portland cement or rapid hardening Portland cement at a Very high content @450 to 550 Kg /M3c) Silica fume @5 to 15% by mass of total cementitious materials
Fly ash or ground granulated blast furnace slag (GGsB)
Super plasticize @5 to 15 liters per M3 of concrete.   

A substantial reduction of quantity of mixing water is the fundamental step for making HPC . Reduction in w/c ratio to less than 0.3 greatly improves the qualities expected in HPC.

There is little controversy between the terms high strength concrete and high performance concrete. High performance concrete is also a high strength concrete but it has a few more 
special characteristics as mentioned above.

HPC is used for works of great importance.In India , HPC of the strength of 60 M.Pa was the time for the construction of containment dome at kaiga and Rajasthan atomic power projects.