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Table of Contents
Intro
Preface
Contents
Abbreviations
1 Introduction
1.1 Early-Age Cracking of Concrete
1.1.1 Significance of Early-Age Cracking
1.1.2 Causes of Early-Age Cracking
1.1.3 Measures for Controlling Early-Age Cracking
1.2 State-of-the-Art of Internal Curing
1.2.1 What is Internal Curing
1.2.2 How Does Internal Curing Work
1.2.3 How to Prepare Internally Cured Concrete
1.2.4 How Does Internal Curing Work on Internal Relative Humidity
1.2.5 How Does Internal Curing Work on Autogenous Shrinkage
1.2.6 How Does Internal Curing Work on Tensile Creep
1.2.7 Cracking Resistance by Restrained Ring Test
1.2.8 Cracking Resistance Under Uniaxial Restrained Condition
1.3 Objectives and Scope
References
2 Internal Relative Humidity of Early-Age Internally Cured Concrete
2.1 Materials
2.1.1 SAPs
2.1.2 LWAs
2.2 Internal Relative Humidity Measurement
2.2.1 Test Method
2.2.2 Calculation of Internal Relative Humidity Decrease Rate
2.3 Internal Relative Humidity of Early-Age Concrete Internally Cured with SAPs
2.3.1 Mixture Proportion
2.3.2 Change of Internal Relative Humidity
2.3.3 Critical Time of Internal Relative Humidity
2.3.4 Internal Relative Humidity Decrease Rate
2.3.5 Prediction Model for Internal Relative Humidity
2.3.6 Summary
2.4 Internal Relative Humidity of Early-Age Concrete Internally Cured with LWAs
2.4.1 Mixture Proportion
2.4.2 Internal Relative Humidity of Concrete with Different Internal Curing w/c Ratios
2.4.3 Prediction Models for Critical Time of Internal Relative Humidity and Working w/c Ratio
2.4.4 Prediction Model for Internal Relative Humidity of Concrete Internally Cured with LWAs
2.4.5 Summary
2.5 Influential Factors of the Internal Relative Humidity of Early-Age Concrete
2.5.1 Influence of Curing Humidity
2.5.2 Influence of w/c Ratio
2.5.3 Summary
References
3 Autogenous Shrinkage of Early-Age Internally Cured Concrete
3.1 Methods and Calculation
3.1.1 Autogenous Shrinkage Measurement
3.1.2 Ultrasonic Velocity Measurement
3.2 Autogenous Shrinkage of Early-Age Concrete Internally Cured with SAPs
3.2.1 Mixture Proportion
3.2.2 Early-Age Expansion
3.2.3 Autogenous Shrinkage at 28 d
3.2.4 Autogenous Shrinkage Rate
3.2.5 Prediction Models for Autogenous Shrinkage
3.2.6 Internal Curing Efficiency
3.2.7 Summary
3.3 Autogenous Shrinkage of Early-Age Internally Cured Concrete Reinforced with Polypropylene Fiber
3.3.1 Mixture Proportion
3.3.2 Influence of Polypropylene Fiber on Early-Age Expansion
3.3.3 Influence of Polypropylene Fiber on Autogenous Shrinkage
3.3.4 Influence of Polypropylene Fiber on Ultrasonic Velocity
3.3.5 Prediction Model of Autogenous Shrinkage Based on Ultrasonic Velocity
3.3.6 Summary
Preface
Contents
Abbreviations
1 Introduction
1.1 Early-Age Cracking of Concrete
1.1.1 Significance of Early-Age Cracking
1.1.2 Causes of Early-Age Cracking
1.1.3 Measures for Controlling Early-Age Cracking
1.2 State-of-the-Art of Internal Curing
1.2.1 What is Internal Curing
1.2.2 How Does Internal Curing Work
1.2.3 How to Prepare Internally Cured Concrete
1.2.4 How Does Internal Curing Work on Internal Relative Humidity
1.2.5 How Does Internal Curing Work on Autogenous Shrinkage
1.2.6 How Does Internal Curing Work on Tensile Creep
1.2.7 Cracking Resistance by Restrained Ring Test
1.2.8 Cracking Resistance Under Uniaxial Restrained Condition
1.3 Objectives and Scope
References
2 Internal Relative Humidity of Early-Age Internally Cured Concrete
2.1 Materials
2.1.1 SAPs
2.1.2 LWAs
2.2 Internal Relative Humidity Measurement
2.2.1 Test Method
2.2.2 Calculation of Internal Relative Humidity Decrease Rate
2.3 Internal Relative Humidity of Early-Age Concrete Internally Cured with SAPs
2.3.1 Mixture Proportion
2.3.2 Change of Internal Relative Humidity
2.3.3 Critical Time of Internal Relative Humidity
2.3.4 Internal Relative Humidity Decrease Rate
2.3.5 Prediction Model for Internal Relative Humidity
2.3.6 Summary
2.4 Internal Relative Humidity of Early-Age Concrete Internally Cured with LWAs
2.4.1 Mixture Proportion
2.4.2 Internal Relative Humidity of Concrete with Different Internal Curing w/c Ratios
2.4.3 Prediction Models for Critical Time of Internal Relative Humidity and Working w/c Ratio
2.4.4 Prediction Model for Internal Relative Humidity of Concrete Internally Cured with LWAs
2.4.5 Summary
2.5 Influential Factors of the Internal Relative Humidity of Early-Age Concrete
2.5.1 Influence of Curing Humidity
2.5.2 Influence of w/c Ratio
2.5.3 Summary
References
3 Autogenous Shrinkage of Early-Age Internally Cured Concrete
3.1 Methods and Calculation
3.1.1 Autogenous Shrinkage Measurement
3.1.2 Ultrasonic Velocity Measurement
3.2 Autogenous Shrinkage of Early-Age Concrete Internally Cured with SAPs
3.2.1 Mixture Proportion
3.2.2 Early-Age Expansion
3.2.3 Autogenous Shrinkage at 28 d
3.2.4 Autogenous Shrinkage Rate
3.2.5 Prediction Models for Autogenous Shrinkage
3.2.6 Internal Curing Efficiency
3.2.7 Summary
3.3 Autogenous Shrinkage of Early-Age Internally Cured Concrete Reinforced with Polypropylene Fiber
3.3.1 Mixture Proportion
3.3.2 Influence of Polypropylene Fiber on Early-Age Expansion
3.3.3 Influence of Polypropylene Fiber on Autogenous Shrinkage
3.3.4 Influence of Polypropylene Fiber on Ultrasonic Velocity
3.3.5 Prediction Model of Autogenous Shrinkage Based on Ultrasonic Velocity
3.3.6 Summary