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High Performance Self-Consolidating Cementitious Composites




ISBN 9781138063044
Published February 28, 2018 by CRC Press
433 Pages - 130 B/W Illustrations

 
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Book Description

This book attempts to bring together some of the basic intricacies in the production of the complete range of self-consolidating cementitious composites, with a proper understanding of the contributions of different materials and their combinations, including performance and limitations.

Presents a comprehensive perspective of the state of the art in self-compacting concretes while explaining the basic background and principles, includes possible alternatives of making SCC with different powder extenders and pozzolanic materials

Explores concepts through theoretical and graphical representations

Table of Contents

1. INTRODUCTION

1.1. The concept

1.2. Historical development

1.3. The definitions

1.4. Formulations and classification of SCCs

1.5. Potential and limitations

1.6. Future prospects

References

2. CONSTITUENT MATERIALS

2.1. Constituent materials and availability

2.2. Cements and characteristics

2.3. Simple powder extenders

2.4. Supplementary cementitious materials

2.5. Superplasticizers and other chemical admixtures

2.6. Aggregate characteristics

2.7. Interactions and compatibility

References

3. INSIGHTS INTO STANDARDS AND SPECIFICATIONS

3.1. Standardization principles

3.2. Fundamental characterization and classification

3.3. Methods of consistency measurement

3.4. Japanese recommendations

3.5. Euro-EFNARC guidelines

3.6. ACI recommendations

3.7. Other perceptions

3.8. Summary and suggestions

References

4. METHODOLOGIES FOR THE PROPORTIONING OF SCC MIXTURES

4.1. Introduction

4.2. Design viewpoints

4.3. Semi-empirical methods

4.4. Compositions based on wetting water requirements of the constituents

4.5. Methods based on aggregate distribution and packing factors

4.6. Methods of limiting the cementitious materials through water content

4.7. Methods of incorporating the cementitious efficiency of pozzolans

4.8. Procedures for incorporating different pozzolans

4.9. Approaches for a specified compressive strength.

4.10. Methods based on rheometer tests

4.11. Methods based on the rheological paste model

4.12. Methods based on the rheological paste model incorporating fibrous materials

4.13. Guidelines based on statistical evaluations

4.14. Need for a relook and proposed methodology

References

5. CONCEPTS AND CRITERIA FOR HIGH PERFORMANCE

5.1. Introduction

5.2. Fundamentals concepts of performance

5.3. Environmental parameters

5.4. Practical approach for high-performance design

5.5. Performance evaluation methodologies

5.6. Concept of pozzolanic efficiency and strength relations

5.7. Effects of pozzolanic addition on consistency and compaction

5.8. Packing and optimal granular skeleton

5.9. Proposed methodology and its effectiveness

5.10. Efficacy of the proposed methodology

References

6. SCCs BASED ON POWDER EXTENDERS AND LOW-END POZZOLANS

6.1. Introduction

6.2. Concept of powder extenders

6.3. SCCs incorporating fly ash

6.4. SCCs incorporating Limestone powder

6.5. SCCs incorporating GGBS

6.6. SCCs through other inert powder extenders

6.7. Practical limitations on powder fillers

References

7. SCCs BASED ON HIGH EFFICIENCY AND NANO POZZOLANS

7.1. Introduction

7.2. High strength and high performance concepts

7.3. SCCs incorporating silica fume and Nano silica

7.4. SCCs incorporating metakaolin

7.5. SCCs incorporating rice husk ash

7.6. Saturation concepts and effects

7.7. SCCs incorporating fibrous constituents

References

8. FRESH CONCRETE CHARACTERISTICS OF SCC

8.1. Introduction

8.2. Fundamentals of consistency and compaction

8.3. Rheology and thixotropy of SCCs

8.4. Critical evaluation and comparison of the test methods

8.5. Effects of quality and quantity of cementitious materials

8.6. Wetting water requirements of powder materials

8.7. Effects of granular skeleton characteristics and fibrous materials

8.8. Segregation and bleeding

8.9. Shrinkage and heat of hydration

8.10. Transport, placement and finishing

8.11. Formwork and pressure on formwork

8.12. Setting times and removal of forms

8.13. Curing needs, precautions and best practices

8.14. Effect of accelerated curing, maturity concepts

8.15. Quality assurance and control

References

9. MECHANICAL CHARACTERISTICS OF SCC

9.1. Introduction

9.2. Physical properties and microstructural effects

9.3. Compressive strength and strength gain rate

9.4. Near-surface characteristics

9.5. Tensile and shear strengths

9.6. Applicability of conventional concrete relations to SCC

9.7. Modulus of elasticity

9.8. Bond with reinforcement

9.9. Creep and relaxation

9.10. Prestressing and anchorages

9.11. Applicability of NDT

References

10. PERFORMANCE AND SERVICE-LIFE OF SCC

10.1. Introduction

10.2. Durability of concrete

10.3. Strength and porosity

10.4. Transport characteristics

10.5. Environmental degradation

10.6. Chemical degradation

10.7. Alkali-aggregate reactivity

10.8. Thermal degradation

10.9. Corrosion characteristics

10.10. Service-life prediction or Residual life evaluation methods

References

11. FRONTIERS AND RESEARCH NEEDS

11.1. Introduction

11.2. Applications and prospects

11.3. SCCs in repair and rehabilitation practice

11.4. Re-alkalization of concrete

11.5. Chloride binding and extraction

11.6. Tunnel lining and grouting applications

11.7. Underwater concrete applications and repair

11.8. Applications in marine environment

11.9. Ultrahigh strength grouts and composites

11.10. Reinforced fibrous composites

11.11. Research and developmental requirements

11.12. Concluding remarks

References

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Author(s)

Biography

Prof. Ganesh Babu Kodeboyina, after obtaining his bachelor’s degree in Civil Engineering with Distinction from the Andhra University, joined IIT Madras for his Masters in Structural engineering. He then continued in IIT Madras and obtained his doctoral degree working in the area of behaviour of Partially Prestressed Concrete structural members. He then joined as a Scientist in the Structural Engineering Research Centre and was involved in several projects like Large Diameter Prestressed Concrete Pipes, Ferro cement, Fiber Reinforced Concrete apart from being the principal investigator on the UNDP sponsored project on Polymer Concrete Composites.