High performance concrete ppt
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The seminar discusses high performance concrete (HPC), its components, methods for achieving superior properties, and its applications in construction. HPC features enhanced durability, strength, and resistance to environmental factors, making it suitable for use in pavements, bridges, and high-rise buildings. It also highlights the advantages and disadvantages of HPC, emphasizing the need for skilled handling during manufacturing and placement.
High performance concrete ppt
- 1. GOOD AFTERNOON & WELCOME TO ALL
- 2. A Technical Seminar on High Performance Concrete MD TARIQUE JILANI USN NO:2AB11ME038 Prof. JAYARAM BHATT ANJUMAN ENGINEERING COLLEGE , DEPARTMENT OF CIVIL ENGINEERING By
- 3. CONTENTS Introduction. What is High Performance Concrete. ? Components/Ingredients of HPC. Methods for achieving High Performance Characteristic of HPC. Stress-strain Behavior Advantages. Disadvantages. Application. Case Study. Conclusion. References.
- 4. INTRODUCTION Concrete is the most widely used construction material in India with annual consumption exceeding 100 million cubic meters. 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. A high-strength concrete is always a high performance concrete, but a high-performance concrete is not always a high-strength concrete.
- 5. What is High Performance Concrete ? According to Paul Zia HPC is a concrete, which meets special performance, and uniformity requirements that cannot be always achieved by using only the conventional materials and normal mixing, placing, and curing practices. According to Civil Engineering Research Foundation (CERP) HPC is a concrete in which some or all of the following properties have been enhanced. (a) Ease of placement (b) Long term mechanical properties (c) Early age strength (d) Toughness
- 6. Components/Ingredients The main ingredients of HPC are as follows 1) Cement 2) Fine aggregate 3) Coarse aggregate 4) Water 5) Mineral admixtures (fine filler and/or pozzolonic supplementary cementitious materials) 6) Chemical admixtures (plasticizers, superplasticizers, retarders, air- entraining agents)
- 7. Methods for achieving High Performance Better durability performance has been achieved by using high- strength, low w/c ratio concrete. Two approaches to achieve durability through different techniques are as follows (1)Reducing the capillary pore system such that no fluid movement can occur is the first approach. This is very difficult to realize and all concrete will have some interconnected pores.
- 8. 2. Creating chemically active binding sites which prevent transport of aggressive ions such as chlorides is the second more effective method. There are two approaches are shown in Fig.1
- 9. Characteristics of High performance concrete. Concrete may be regarded as high performance for several different reasons: Very low porosity through a tight and refined pore structure of the cement paste. Very low permeability of the concrete High resistance to chemical attack. Low heat of hydration High early strength and continued strength development Low water binder ratio Low bleeding and plastic shrinkage
- 10. Stress-strain Behavior The shape of the ascending part of the stress-strain curve is more linear and steeper for high-strength concrete, and the strain at the maximum stress is slightly higher for HPC. The slope of the descending part becomes steeper for high performance concrete. High performance concrete exhibits less internal micro cracking than lower-strength concrete for a given imposed axial strain.
- 11. Advantages Speed Of Construction Economical Material In terms Of Time And Money Higher Seismic Resistance Improved Durability Abrasion Resistance High Tensile Strength Reduced Maintenance Cost
- 12. Disadvantages An Extended Quality Control Cost Special Constituents Manufactured And Placed carefully
- 13. Application In Pavements High Performance concrete is being increasingly used for highway pavements due to the potential economic benefits Fast track concrete paving (FTCP) technology can be used for complete pavement reconstruction.
- 14. In Bridges HPC is being extensively used now for the fabrication of precast pylons, piers, and girders of many long span bridges in the world For Example The Normandie Bridge in France (1993), Concrete structures are preferable for railway bridges to eliminate noise and vibration problems and minimize the maintenance cost. Fast track concrete paving (FTCP) technology can be used for complete pavement reconstruction. Application
- 15. In High-rise Buildings. The reasons for using the high strength concrete in the area of high-rise buildings are to reduce the dead load, the deflection, the vibration and the noise, and the maintenance cost. Application Miscellaneous Applications. Fiber reinforced concrete has been used with and without conventional reinforcement in many field applications. These include bridge deck overlays, floor slabs, pavements and pavement overlays, refractories, hydraulic structures, thin shells, rock slope stabilization, mine tunnel linings and many precast products.
- 16. Case Study JOIGNY BRIDGE Built Across River Yonne Three Span Bridge Height Of 2.2m Width Of 15.8m French Codes Features. Concrete Strength- 91.7MPa AND 65.5MPa Tensile Strength is 5.1MPa FIRST BRIDGE WITH 60MPa Completed In 1989
- 17. PETRONAS Tower Nuclear Reactor France
- 18. LA GRANDE ARCHE, PARIS THE GREAT HASSAN II MOSQUE,MOROCCO
- 19. Conclusion We are going to expect concrete that is a little more expensive per cubic meter to buy but It will require less skill and effort to place. It will look better with no appearance defects. It will be more durable. It will require more skill at the batching plant.
- 20. References 1. PHD Thesis of Dr. (Smt) B.K Shah on" High Performance, Eco- friendly Cement Using High Volume Industrial Byproducts and Waste Materials (IBPW)“ 2. C.Suryawanshi,”Structural significance of high performance concrete”, Indian Concrete journal. (march2007). 3. M.S. Shetty, “ Concrete Technology- theory and practice”, S.CHAND publications,2013. 4. A.T. mullick, “High Performance Concrete in INDIA”, Indian concrète journal, (Sept-2005) pp 7-12. 5. IS 10262: 1982, “Recommended Guidelines for Concrete Mix design”, Bureau of Indian Standard, New Delhi.