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High performance concrete project

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About High-performance concrete, and its applications in the construction industry for building and bridges

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HPC CONCRETE AND ITS APPLICATIONS by lakhan naiak
CONTENTS • INTRODUCTION • MIX DESIGN OF HPC • INGREDIENTS OF HPC • CHARACTERISTICS OF HPC • ADVANTAGES • DISADVANTAGES • APPLICATIONS
INTRODUCTION Concrete is known as most durable and strong material ,Researchers and experiments made it to greater durable and strong ,This scenario leads to use of the additive mixtures to improve the quality of concrete.As outcome of the experiments many different concretes are found ,In which ‘HPC’ and ‘UHPC' are advanced interms of properties(durability,workability and strength). American Concrete Institute(ACI) defined HPC as concrete m eet in g special p e rfo rm a n ce a n d u n i fo r m l y requirements that ca n no t a lw a y s be achieved routinely conventional concrete.
MIX DESIGN OF HPC CONCRETE MIX The primary aim of a mix design is to obtain more (or) less required properties of a concrete.mix design of HPC concrete is different from that of usual concrete.The three important characteristics of HPC that are kept in mind while Mix designing are 1)Strength 2)Durability and 3)Workability
INGREDIENTS USED IN HPC AND WHY: MATERIAL DESIRED PROPERTY 1)Ordinary portland cement 2)Fly ash 3)Slag 4)Silica fume 5)Superplasticizers 6)Water reducers 7)Retarders/Accelerators 8)Corrosion inhibitors -Binding/Strength -Durability/cost -Flowability -reduce w/c ratio -control setting -control corrosion -high strength 1) cement:- Generally ordinary portland cement is used for mixing HPC and used cement should be compatible with chemical admixtures. 2)Aggregates:- Fine aggregate:-Locally available allival sand(medium ,specific gravity = 2.6) is used.
- Coarse aggregres:- - Upto 70MPa comp.strength ,coarse aggregate of maximum size is 20 to 28mm is used. - For 100MPa comp.strength, aggregate of size 10 to 14mm is used. - Greater than 125MPa comp.strength 10 to 14 mm size is used. 3)Mineral Admixtures:- - GGBS,Fly ash and natural pozzolanos, not only reduce cost of concrete,but also addresses the slump loss problems. - While silica fume is usually required to attain higher strength to concrete,and gives durableness to concrete. 4)Water cement ratio: - To attain higher strength for a concrete w/c ratio is to be reduced.But reduction in w/c ratio makes non workable, to get better workable superplasticizers are used. - Water cement ratio is vary for different places due to different temperatures,humidity.
High performance concrete project
Note: a succesful m i x is obtained by Trail m e t h o d
CHARACTERISTICS OF HPC:- High-performance concrete characteristics are developed for particular applications and environments; some of the properties that may be required include: • High strength • High early strength • High modulus of elasticity • High abrasion resistance • High durability and long life in severe environments • Low permeability and diffusion • Resistance to chemical attack • High resistance to frost and deicer scaling damage • Toughness and impact resistance • Ease of placement • Compaction without segregation • Inhibition of bacterial and mold growth.
ADVANTAGES • Reduction in member size, resulting in increase in plinth area/useable area and direct savings in the concrete volume saved. • Reduction in the self-weight and super-imposed DL with the accompanying saving due to smaller foundations. • Reduction in form-work area and cost with the accompanying reduction in shoring and stripping time due to high early-age gain in strength. • Construction of High –rise buildings with the accompanying savings in real-estate costs in congested areas. • Superior long-term service performance under static, dynamic and fatigue loading. • Low creep and shrinkage. • Higher resistance to freezing and thawing, chemical attack, and significantly improved long-term durability and crack propagation.
Disadvantages:- The current disadvantages of HPC pointed out by some engineers include: • The initially higher construction bid prices to be expected with the use of any new technology. • Quality control concerns related to various material selection, testing methods in use and the number of tests. .
• APPLICATIONS:- • High-performance concrete has been primarily used in tunnels, bridges, and tall buildings for its strength, durability, and high modulus of elasticity (Fig. 17-1). It has also been used in shotcrete repair, poles, parking garages, and agricultural applications. • HPC is also used at adverse environment conditions .concrete doesn't easily get corrode or damaged due to high compaction and low permeability of it.
STRUCTURES USED HPC :- 1) THE CONFEDERATION BRIDGE(CANADA):
MIX DESIGN OF BRIDGE:-
2)PATRONAS TOWER:-
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High performance concrete project

  • 1. HPC CONCRETE AND ITS APPLICATIONS by lakhan naiak
  • 2. CONTENTS • INTRODUCTION • MIX DESIGN OF HPC • INGREDIENTS OF HPC • CHARACTERISTICS OF HPC • ADVANTAGES • DISADVANTAGES • APPLICATIONS
  • 3. INTRODUCTION Concrete is known as most durable and strong material ,Researchers and experiments made it to greater durable and strong ,This scenario leads to use of the additive mixtures to improve the quality of concrete.As outcome of the experiments many different concretes are found ,In which ‘HPC’ and ‘UHPC' are advanced interms of properties(durability,workability and strength). American Concrete Institute(ACI) defined HPC as concrete m eet in g special p e rfo rm a n ce a n d u n i fo r m l y requirements that ca n no t a lw a y s be achieved routinely conventional concrete.
  • 4. MIX DESIGN OF HPC CONCRETE MIX The primary aim of a mix design is to obtain more (or) less required properties of a concrete.mix design of HPC concrete is different from that of usual concrete.The three important characteristics of HPC that are kept in mind while Mix designing are 1)Strength 2)Durability and 3)Workability
  • 5. INGREDIENTS USED IN HPC AND WHY: MATERIAL DESIRED PROPERTY 1)Ordinary portland cement 2)Fly ash 3)Slag 4)Silica fume 5)Superplasticizers 6)Water reducers 7)Retarders/Accelerators 8)Corrosion inhibitors -Binding/Strength -Durability/cost -Flowability -reduce w/c ratio -control setting -control corrosion -high strength 1) cement:- Generally ordinary portland cement is used for mixing HPC and used cement should be compatible with chemical admixtures. 2)Aggregates:- Fine aggregate:-Locally available allival sand(medium ,specific gravity = 2.6) is used.
  • 6. - Coarse aggregres:- - Upto 70MPa comp.strength ,coarse aggregate of maximum size is 20 to 28mm is used. - For 100MPa comp.strength, aggregate of size 10 to 14mm is used. - Greater than 125MPa comp.strength 10 to 14 mm size is used. 3)Mineral Admixtures:- - GGBS,Fly ash and natural pozzolanos, not only reduce cost of concrete,but also addresses the slump loss problems. - While silica fume is usually required to attain higher strength to concrete,and gives durableness to concrete. 4)Water cement ratio: - To attain higher strength for a concrete w/c ratio is to be reduced.But reduction in w/c ratio makes non workable, to get better workable superplasticizers are used. - Water cement ratio is vary for different places due to different temperatures,humidity.
  • 8. Note: a succesful m i x is obtained by Trail m e t h o d
  • 9. CHARACTERISTICS OF HPC:- High-performance concrete characteristics are developed for particular applications and environments; some of the properties that may be required include: • High strength • High early strength • High modulus of elasticity • High abrasion resistance • High durability and long life in severe environments • Low permeability and diffusion • Resistance to chemical attack • High resistance to frost and deicer scaling damage • Toughness and impact resistance • Ease of placement • Compaction without segregation • Inhibition of bacterial and mold growth.
  • 10. ADVANTAGES • Reduction in member size, resulting in increase in plinth area/useable area and direct savings in the concrete volume saved. • Reduction in the self-weight and super-imposed DL with the accompanying saving due to smaller foundations. • Reduction in form-work area and cost with the accompanying reduction in shoring and stripping time due to high early-age gain in strength. • Construction of High –rise buildings with the accompanying savings in real-estate costs in congested areas. • Superior long-term service performance under static, dynamic and fatigue loading. • Low creep and shrinkage. • Higher resistance to freezing and thawing, chemical attack, and significantly improved long-term durability and crack propagation.
  • 11. Disadvantages:- The current disadvantages of HPC pointed out by some engineers include: • The initially higher construction bid prices to be expected with the use of any new technology. • Quality control concerns related to various material selection, testing methods in use and the number of tests. .
  • 12. • APPLICATIONS:- • High-performance concrete has been primarily used in tunnels, bridges, and tall buildings for its strength, durability, and high modulus of elasticity (Fig. 17-1). It has also been used in shotcrete repair, poles, parking garages, and agricultural applications. • HPC is also used at adverse environment conditions .concrete doesn't easily get corrode or damaged due to high compaction and low permeability of it.
  • 13. STRUCTURES USED HPC :- 1) THE CONFEDERATION BRIDGE(CANADA):
  • 14. MIX DESIGN OF BRIDGE:-