High performance concrete; types and uses

the best presentation about high performance concrete

2. Group # 1
2013-BT-Civil-01 Muhammad Aamir
2013-BT-Civil-25 Suphvan Azhar

3. High performance concrete

4. Contents
•Introduction
•Definition
•History
•Properties
•Why HPC is important?
•HPC used in structures
•Setting time
•Durability characteristics
•When to use HPC?
•Benefits
•Types of HPC
•Limitations
•Conclusions
•Question Answer Session

5. Introduction
High performance concrete is a concrete mixture, which
possess high durability and high strength when
compared to conventional concrete.
This concrete contains one or more of cementious
materials such as fly ash, Silica fume or ground
granulated blast furnace slag and usually a super
plasticizer. . The use of some mineral and chemical
admixtures like Silica fume and Super plasticizer enhance
the strength, durability and workability qualities to a very
high extent.

6. Definition
•Any concrete which satisfies certain criteria
proposed to overcome limitations of conventional
concrete may be called as high performance
concrete .
•It may include concrete which provides either
substantially improved resistance to environmental
influences OR substantially increased structural
capacity while maintaining adequate durability.

7. HPC
Concrete may be regarded as high
performance
for several reasons
•High strength
•High workability
•High durability
•Also improve visual appearance

8. History of concrete
•During Roman empire Roman concrete was
made from quicklime, ash and an aggregate of
pumice. It quickly hardened into a rigid mass, free
from many of the internal thrusts and strains
which trouble the builders of similar structures in
stone or brick. Modern tests show Roman
concrete to be as strong as modern Portland
cement concrete.

9. properties
•Ease of placement
•Compaction without segregation
•Early age strength
•Long term mechanical properties
•Permeability
•Density
•Toughness
•Volume stability
•Long life in severe environments

10. Why is Hpc important?
Concrete is the most widely used building material.
any improvement in the design of this material e.g.
cost, durability, or strength ripples through the
economy. HPC is a specialized series of concretes
designed to provide several benefits in construction
of concrete structure.

11. Hpc used in structures

12. Setting time

                Setting time can vary depending on the application and
the presence of set modifying admixtures and percentage of
the paste composed of Portland cement. The use of large
quantities of water reducing admixtures can significantly
extend setting time

13. Durability characteristics
The most important property which distinguish HPC from
conventional concrete.
This is due to the refinement of pore structure of
microstructure of the cement concrete to achieve a very compact
material with very low permeability to ingress of water, air, oxygen,
chlorides, sulphates and other deleterious agents.

14. WHEN TO USE HPC
                     High Performance Concrete can be used in severe
exposure conditions where there is a danger to concrete by chlorides
or sulphates or other aggressive agents as they ensure very low
permeability.

15. Performance benefits Cost& other benefits
•Ease of placement and
consolidation without
affecting strength
•Long term mechanical
properties
•Early high strength
•Toughness
•Volume stability
•Longer life in severe
environments
•Less material
•Fewer beams
•Reduced maintenance
•Extended life cycle

16. Types of hpc
1.Toproc CR – Chemical Resistant concrete
2.Toproc ED – Early Drying concrete
3.Toproc UW – Ultra Water resistant concrete
4.Toproc HR – Heat Resistant concrete
5.Toproc SY – Impact and abrasion resistance

17. LIMITATIONS

•Concrete can be damaged at very high
temperature.
•High Performance Concrete has to be
manufactured much more carefully than normal
concrete.
•An extended quality control is required
•In concrete plant and at delivery site, additional
tests are required. This increases the cost
•Some special constituents are required which may
not be available in the ready mix concrete plants.

18. Conclusion
•HPC become a crucial element of the viability of
tall buildings in the region
•High strength to reduce the size of sections
•High durability makes it much important
•It enhance visual effect
•It can bear severe environments

19. THANKS FOR YOUR ATTENTION