uses and advantages of high performance concrete. all time best presentation

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

2. HIGH PERFORMANCE CONCRETE

3. 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

4. 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.

5. 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.

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

7. HISTORY
 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.

8. PROPERTIES
 Ease of placement
 Compaction without segregation
 Early age strength
 Long term mechanical properties
 Permeability
 Density
 Heat of hydration
 Toughness
 Volume stability
 Long life in severe environments

9. 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.

10. HPC USED IN STRUCTURES

11. 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

12. 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.

13. 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.

14. 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

15. 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

16. 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.

17. 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

18. REFERENCES
 www.wikipedia.org
 www.concreteproducts.com
 Google images
 www.docsto.com

19. THANKS FOR YOUR ATTENTION