3rd International Conference on the Application of Superabsorbent Polymers (SAP) and Other New Admixtures Towards Smart Concrete

Preface

Contents

RILEM Publications

RILEM Proceedings (PRO)

RILEM Proceedings (PRO)

Microstructure, Hydration and Absorption

Calorimetry Analysis of High Strength Cement Pastes Containing Superabsorbent Polymer (SAP)

Abstract

1 Introduction

2 Materials and Methods

3 Analisys and Results

4 Conclusions

Acknowledgements

References

Comparison of Sorption Assessment Methods for Superabsorbent Polymers

Abstract

1 Introduction

2 Materials and Methods

3 Results and Discussion

4 Conclusions

Acknowledgments

References

Altering the Crosslinking Density of Polyacrylamide Hydrogels to Increase Swelling Capacity and Promote Calcium Hydroxide Growth in Cement Voids

Abstract

1 Introduction

2 Materials and Methods

3 Results and Discussion

3.1 PAM Characterization

3.2 Cement Microstructure and Compression Testing

References

X-Ray Micro Tomography of Water Absorption by Superabsorbent Polymers in Mortar

Abstract

1 Introduction

2 Methods

2.1 Materials and Sample Preparation

2.2 Micro-CT Differential Dynamic Scanning

3 Results

4 Conclusion

Acknowledgments

References

Characterization of Neutral Versus Anionic Superabsorbent Polymers (SAPs) in Ion-Rich Solutions for Their Use as Internal Curing Agents

Abstract

1 Introduction

2 Experimental

2.1 Materials

2.2 SAP Preparation

2.3 SAP Characterizations

3 Result and Discussion

3.1 SAP Characterizations

4 Conclusion

References

Evaluation of Absorption Capacity and Spacing of Superabsorbent Polymer Particles in Cement Paste

Abstract

1 Introduction

2 Experimental

2.1 Materials and Production of Specimens Containing SAP

2.2 Determination of Particle Size Distribution of SAP

2.3 Nearest Neighbor Distance Distribution Between SAP Particles and a Distance from a Given Location to SAP Particles

3 Results and Discussion

3.1 Estimation of Absorption Capacity

3.2 Number Intensity of SAP Estimated by Fundamental Stereology Formulae

3.3 Distance Between SAP Particles

4 Conclusions

References

Mechanical Properties and Durability

Effect of SAP on the Freeze-Thaw Resistance of Concrete: Tests According to Russian Standards

Abstract

1 Introduction

2 Russian Standard on Frost Resistance

3 Materials and Test Methods

4 Results and Discussion

5 Conclusions

Acknowledgements

References

Influence of Superabsorbent Polymers on Properties of High-Performance Concrete with Active Supplementary Cementitious Materials of Nigeria

Abstract

1 Introduction

2 Experimental Procedure

2.1 Materials

2.2 Methods

2.2.1 Properties of Constituent Materials

2.2.2 HPC Specimen Preparation

2.2.3 Water Absorption

2.2.4 Compressive Strength

3 Results and Discussion

3.1 Physical and Chemical Properties of Constituent Materials

3.2 Fresh Properties of HPC

3.3 Hardened Properties of HPCs

3.3.1 Compressive Strength of HPCs

3.3.2 Water Absorption of HPCs

4 Conclusion

Acknowledgement

References

Comparative Study of Superabsorbent Polymers and Pre-soaked Pumice as Internal Curing Agents in Rice Husk Ash Based High-Performance Concrete

Abstract

1 Introduction

2 Experimental Procedure

2.1 Materials

2.2 Methods

2.2.1 Properties of Constituent Materials

2.2.2 HPC Specimen Production

2.2.3 Compressive Strength and Density

3 Results and Discussion

3.1 Physical and Chemical Properties

3.2 Compressive Strength of HPCs

4 Conclusion and Recommendation

Acknowledgement

References

Long-Term Parameters of New Cement Composites

Abstract

1 Introduction

2 Materials and Methods

3 Results and Discussion

4 Conclusion

Acknowledgments

References

Shrinkage and Associated Cracking

The Effect of SAP on Volumetric Changes and Microstructural Alterations in PC-GGBS Matrices

Abstract

1 Introduction

2 Experimental Programme

3 Results and Discussions

4 Conclusions

Acknowledgements

References

Exploring Different Choices of “Time Zero” in the Autogenous Shrinkage Deformation of Cement Pastes Containing Superabsorbent Polymers

Abstract

1 Introduction

2 Materials and Methods

2.1 Mixture Compositions

2.2 Measuring the Autogenous Shrinkage

2.3 The Hardening of the Mixtures

2.4 The Build-Up in the Capillary Pressure

3 Results and Discussion

4 Conclusion

Acknowledgments

References

Comparative Study Between Strain Gages for Determination of Autogenous Shrinkage

Abstract

1 Introduction

2 Experimental Program

2.1 Methods

3 Results and Discussion

4 Conclusion

Acknowledgments

References

Dewatering Kinetics from Fresh Cement Pastes Enriched with Superabsorbent Polymer (SAP) Samples at Ambient and Elevated Temperatures Visualised and Quantified by Neutron Radiography Imaging

Abstract

1 Introduction

2 Experimental

3 Results and Discussion

4 Conclusion

Acknowledgements

References

Kinetics of SAPs During Hardening, Drying and Healing in Cementitious Materials Studied by NMR

Abstract

1 Introduction

2 Materials and Methods

3 Results

4 Conclusions

Acknowledgements

References

Rheology and Admixtures

The Role of Chemical Admixtures in the Formulation of Modern Advanced Concrete

Abstract

1 Polycarboxylate (PCE) Superplasticizers

1.1 Current PCE Technology

1.2 New PCE Products

1.3 Tailoring PCEs to Specific Applications

2 Early Strength Enhancing Admixtures

3 Stabilizers

4 Shrinkage-Reducing Admixtures

5 New Admixture Technologies – What Can We Expect in the Future?

5.1 Improved Curing Agents

5.2 Admixtures Improving the Ductility of Concrete

6 Conclusion

References

Bio-Based Rheology Modifiers for High Performance Concrete – Possible Modes of Actions and Case Study for Cassava Starch in West Africa

Abstract

1 Introduction

2 Experimental Setup

2.1 Materials

2.2 Flow Diameter

2.3 Zeta Potentials and Hydrodynamic Diameters

3 Results and Discussion of the Flow Tests

4 Case Study: Cocrete Value Chains with Cassava Waste

5 Conclusions

Acknowledgements

References

Influence of Supplementary Cementitious Materials and Superplasticisers on the Rheological Properties of Concrete

Abstract

1 Introduction

2 Materials

3 Test Methodology

4 Results and Discussion

4.1 Influence of Superplasticisers

4.2 Influence of SCM

4.3 Interaction Between SCM and Superplasticisers

4.4 Effect of PCE on Stress Growth in the Presence of Gypsum

5 Conclusion

Acknowledgements

References

Acacia Karroo as Potential Admixture for Hot African Weather

Abstract

1 Introduction

2 Objectives

3 Durability of Concrete

4 Expimental Framework

5 Results and Discussion

6 Conclusions

References

Used Oil as an Admixture to Improve the Rheological Properties of Concrete

Abstract

1 Introduction

2 Research Significance

3 Experimental Program

3.1 Test Setup

3.2 Mixtures and Materials

4 Results

4.1 Slump Test

4.2 Air-Content

4.3 Compressive Strength

4.4 Rheology

5 Conclusion

Acknowlegdements

References

Effect of Different Molecular Weights and Chemical Composition of Superplasticizers on the Structural Build-up of Cement Paste Using Dynamic Oscillatory Rheology

Abstract

1 Introduction

2 Materials and Methods

2.1 Materials

2.2 Size Exclusion Chromatography (SEC)

2.3 Cement Dispersion Testing

2.4 Dynamic Oscillatory Rheology

3 Results and Discussion

3.1 Characterization of PCE Polymers

3.2 Cement Dispersion

3.3 Dynamic Strain Sweep

3.4 Structural build up- dynamic time sweep

4 Conclusions

Acknowlegements

References

Compatibility Between Cement and Superplasticiser in Combination with Fines, Gypsum and Fly Ash

Abstract

1 Introduction

2 Experimental Framework

3 Experimental Results and Discussion

3.1 Influence of Superplasticiser

3.2 Influence of Gypsum and Superplasticiser

3.3 Influence of Fly Ash and Superplasticiser

3.4 Influence of Gypsum and Dust Fillers

4 Conclusion

5 Acknowledgements

References

Applications and Innovations

Application of Nano-silica Particles to Improve the Mechanical Properties of High Performance Concrete Containing Superabsorbent Polymers

Abstract

1 Introduction

1.1 The Superabsorbent Polymer (SAP)

1.2 The Use of Nano Materials

2 Materials and Mixtures Proportions

3 Test Methods

3.1 Mechanical Properties

3.2 Autogenous Shrinkage

4 Results and Discussion

4.1 Mechanical Properties

4.2 Autogenous Shrinkage

5 Conclusions

References

Cement Replacement and Improved Hydration in Ultra-High Performance Concrete Using Biochar

Abstract

1 Introduction

2 Materials and Methodology

3 Results and Discussions

4 Conclusion

Acknowledgment

References

Solidification of Two-Component Grouts by the Use of Superabsorbent Polymers as Activator

Abstract

1 Introduction

2 Annular Gap Grouting

3 Experimental Studies

4 Conclusion

Acknowledgement

References

Internal Curing Using Superabsorbent Polymers for Alkali Activated Slag-Fly Ash Mixtures

Abstract

1 Introduction

2 Materials and Methods

3 Results and Discussion

4 Conclusions

References

Effect of High Plasticiser Dosage on Ultra High-Performance Fibre Reinforced Concrete (UHPFRC)

Abstract

1 Introduction

2 Experimental Programme

3 Experimental Results and Discussion

4 Conclusion

References

Author Index