Proceedings of the 3rd RILEM Spring Convention and Conference (RSCC 2020): Volume 3: Service Life Extension of Existing Structures

Committee
	Topic 3: Service Life Extension of Existing Structures
	Topic Lead:
	Topic Scientific Committee:
Preface
Contents
RILEM Publications
	RILEM Proceedings (PRO)
	RILEM Reports (REP)
Experimental Analysis of the Bending Behavior of Structural Metal Joints Based on the Use of Girder Clamps to Service Life Extension of Existing Structures
	1 Introduction
	2 Proposed Methodology
	3 Materials
	4 Results
	5 Conclusions
	References
Corrosion of Carbonated Structures. Real Cases of Structures in Spain
	1 Introduction
	2 Methodology
		2.1 Description of the Structures
		2.2 Climate to Which Structures are Exposed
		2.3 Corrosion Rate Measurements
	3 Results and Discussions
		3.1 Structure A (Tarragona)
		3.2 Structure B (Oviedo)
	4 Conclusions
	References
Bond Behaviour of NSM FRP Strengthening Systems on Concrete Elements Under Sustained Load
	1 Introduction
	2 Experimental Programme
		2.1 Materials
		2.2 Short-Term Direct Pull-Out Tests
		2.3 Long-Term Direct Pull-Out Tests
	3 Analysis and Discussion of Results
		3.1 Pull-Out Short-Term Tests Results
		3.2 Pull-Out Long-Term Tests Results
	4 Conclusions
	References
Assessment of Different Coastal Defence Structures to Promote Wave Energy Dissipation and Sediments Retention
	1 Introduction
	2 Methodology
		2.1 SWAN and XBeach numerical models
		2.2 Simulated Scenarios
	3 Results and Discussion
		3.1 Hydrodynamics
		3.2 Morphodynamics
	4 Conclusions
	References
Concrete Drying Modelling in a Variable Temperature Environment
	1 Introduction
	2 Moisture Transport Modelling: A Richards Fick with Temperature Effects (RFT) Approach
		2.1 Gouverning Equations
		2.2 Constitutive Laws with Temperature Effects
		2.3 Initial State and Boundary Conditions
	3 Sobol' Sensitivity Analysis of the RFT Model
	4 RFT Model Calibration on VERCORS Experiment Database
	5 Validation and Application of RFT Model
	6 Conclusion
	References
Hydric Characterisation at Different Temperature of Nuclear Waste Package's Concrete
	1 Introduction
	2 Methods
		2.1 Drying Test
		2.2 Drying Shrinkage Test
		2.3 Cup Test
	3 Results and Discussions
		3.1 Relative Mass Variation
		3.2 Drying Shrinkage
		3.3 Cup Test
	4 Conclusion
	References
Modelling the Three-Stage of Creep
	1 Introduction
	2 Theoretical Background
		2.1 Creep
		2.2 The Three-Stages of Creep
		2.3 Biological Ageing Analogy
	3 Modeling Approach
		3.1 Creep Safety Envelope
	4 Material Testing
		4.1 Liu’s Creep Data
	5 Application of Crevecoeur Fitting Methodology
		5.1 Fitting Quality
	6 Results and Comments
		6.1 Transition Points
	7 Conclusions
	References
Effects of the Thermal Conditioning on the Mechanical Properties of an FRCM (Fiber Reinforced Cementitious Matrix) Strengthening System
	1 Introduction
	2 Experimental Investigation
		2.1 Fiber and Cement Based Mortar
		2.2 Strengthening System
		2.3 Experimental Procedure
	3 Results and Discussion
	4 Conclusions
	References
Durability Under Thermal Actions of Concrete Elements Confined with an Inorganic Matrix Fiber-Reinforced Composites
	1 Introduction
	2 Experimental Investigation
		2.1 Specimen Preparation and Test Setup
	3 Results and Discussion
	4 Conclusion
	References
Accelerating the Hardening of Lime Mortar on Addition of Organics for Repair in Heritage Structures
	1 Introduction
	2 Materials and Experiments
		2.1 Raw Materials
		2.2 Mortar Specimen Preparation
		2.3 Experimental Investigation
	3 Results and Discussion
		3.1 Test on Raw Materials
		3.2 Test on Hardened Mortar
	4 Conclusion
	References
Effect of Relative Humidity on Cement Paste: Experimental Assessment and Numerical Modelling
	1 Introduction
	2 Method
		2.1 Experiments
		2.2 Modelling
		2.3 Identification Method
	3 Discussion
	4 Conclusion
	References
Self-healing Capacities of Mortars with Crystalline Admixtures
	1 Introduction
	2 Experimental Investigations
		2.1 Materials and Mixture Proportions
		2.2 Experimental Program
	3 Results
		3.1 Self-healing Results
		3.2 Microstructure of Mortar
	4 Discussion
	5 Conclusions
	References
In-Plane Behavior of Clay Brick Masonry Wallets Strengthened by TRM System
	1 Introduction
	2 Experimental Program
		2.1 Material Characterization Tests
		2.2 Diagonal Compression Test
	3 Experimental Results and Discussion
		3.1 Material Properties
		3.2 In-Plane Experimental Characterization
	4 Conclusion
	References
Meso-Scale Study of Plain Concrete Beam Under Both Ambient and High Temperature
	1 Introduction
	2 Meso-Scale Model for Concrete
		2.1 Generations of Aggregate Particles
		2.2 Constitutive Models of the Constituents and Material Parameters Choice
	3 Results and Discussion
	4 Conclusions
	References
Electrochemical Realkalisation of Carbonated “Dalle de Verre” Windows
	1 Introduction
	2 Materials and Methods
		2.1 Materials
		2.2 Sample Preparation
		2.3 Exposure Duration
		2.4 Electrochemical Realkalisation
	3 Results and Discussion
	4 Conclusion and Future Work
	References
Micro-To-Meso Scale Mechanisms for Modelling the Fatigue Response of Cohesive Frictional Materials
	1 Introduction
	2 Unified Fatigue Damage-Mechanisms Model Formulation
		2.1 Main Assumptions
		2.2 Constitutive Response
	3 Numerical Example
	4 Conclusions
	References
Deployment of a High Sensor-Count SHM of a Prestressed Concrete Bridge Using Fibre Optic Sensors
	1 Introduction
		1.1 Overview
		1.2 FBG Sensing Technology
	2 SHM System
		2.1 Monitored Structure Characterisation
		2.2 Monitoring System
	3 First Measurement Data
	4 Conclusion
	References
Enhanced Fatigue Life of Old Metallic Bridges—Application of Preloaded Injection Bolts
	1 Introduction
	2 Experimental Campaign
		2.1 Single Shear
		2.2 Double Shear
	3 Numerical Analysis
		3.1 Fatigue Model
		3.2 Finite Element Modelling
		3.3 Results
	4 Conclusions
	References
Efficient Labelling of Air Voids in Hardened Concrete for Neural Network Applications Using Fused Image Data
	1 Introduction
	2 Materials and Methods
		2.1 Specimen
		2.2 Imaging Methods
		2.3 Object Detector
	3 Data
	4 Results
		4.1 Model Performance
		4.2 Discussion
	5 Conclusions
	References
Evaluation of Electromigration Desalination of Granite Contaminated with Salts–A Contribution to the Conservation of Architectural Surfaces
	1 Introdution
	2 Materials and Methodology
		2.1 Granite Characteristics
		2.2 Granite Specimens Preparation
		2.3 Electromigration Method. Materials and Experimental Proceeding
	3 Discussion of Results
	4 Conclusions
	References
Pathological Manifestations of Neoprene Support Devices in Infrastructure
	1 Introduction
	2 Methodology
		2.1 Inspection of Bridges and Support Equipment
		2.2 Pathological Manifestation in Neoprene Support Devices
	3 Results−Case Study of Pathological Manifestations, Their Causes and Treatments in Neoprene
	4 Conclusions
	References
Experimental Investigation on Organic Water Slaked Lime Mortar
	1 Introduction
	2 Materials and Sample Preparation
		2.1 Raw Materials
		2.2 Organic Additive-Raisins
		2.3 Slaking Process
		2.4 Casting the Cubes
	3 Tests for Raw Materials
		3.1 Sieve Analysis
		3.2 X-Ray Diffraction Test of Lime Sample
		3.3 Fourier Transform Infrared Spectroscopy (FT-IR) of Organic-Raisin
		3.4 X-Ray Diffraction of Slaked Lime Putty
	4 Preliminary Tests
		4.1 Initial Flow Test and Workability
	5 Secondary Tests
		5.1 Compressive Strength
		5.2 X-Ray Diffraction Test
		5.3 Fourier Transform Infrared Spectroscopy (FT-IR) of Mortar Samples
	6 Conclusion
	References
Effect of HPFRCC on Cyclic Behavior of Diagonally Reinforced Coupling Beams
	1 Introduction
	2 Details of Diagonally Reinforced Coupling
	3 Experimental Test Program
	4 Cyclic Curves of RC and HPFRCC DRCB Specimens
	5 Stiffness Deterioration and Energy Dissipation
	6 Conclusion
	References
Production of Recycled Aggregate Concrete Using Construction and Demolition Waste
	1 Introduction
	2 Experimental Program
		2.1 Materials and Testing Methods
		2.2 Aggregates Treatment
		2.3 Experiments
		2.4 Concrete Mixtures
		2.5 Casting and Curing
	3 Experimental Results and Discussion
		3.1 Properties of Aggregates
		3.2 Aggregates Treatment and Image Analysis
		3.3 Mechanical Properties
		3.4 Durability Properties
	4 Conclusions
	References
Contribution of Thermodynamic Modeling to the Understanding of Interactions Between Hydrated Cement Pastes and Organic Acids
	1 Introduction
	2 Materials and Methods
		2.1 Batch Experiments
		2.2 Modeling Approach
	3 Results and Discussion
		3.1 Experiments Results
		3.2 Thermodynamic Modeling
	4 Conclusion
	References
An Analytical Approach for Pull-Out Behavior of TRM-Strengthened Rammed Earth Elements
	1 Introduction
	2 Experimental Program
	3 Analytical Model
		3.1 Linear Stage
		3.2 Nonlinear Stage
		3.3 Damage Model
	4 Conclusions
	References
Self-Healing Concrete Research in the European Projects SARCOS and SMARTINCS
	1 COST Action CA 15202 SARCOS
		1.1 Introduction
		1.2 Literature and Research Needs
		1.3 Interlaboratory Tests to Define Methods for Self-Healing Efficiency
	2 Marie Curie ITN SMARTINCS
	References
Strengthening of Hollow Core Slabs to Reduce Excessive Vibrations: A Case Study
	1 Introduction
	2 Project Background
	3 Structural Engineering Assessment
		3.1 Structural Damage Assessment of the Building
		3.2 Design Verification
	4 Strengthening of Hollow Core Slabs for SLS
		4.1 General Design Considerations
		4.2 Strengthening Steel Framing Plan
	5 Field Vibration Measurement and Dynamic Properties
		5.1 Vibration Field Measurement
		5.2 Dynamic Response
		5.3 Deflections of the Hollow Core Slab
		5.4 Strains in the Concrete Slabs
		5.5 Strains in Steel Beams
	6 Conclusions
	References
3D Thermo-Hygro-Mechanical Simulation of a RC Slab Under Restrained Shrinkage and Applied Loads: Influence of the Reinforcement Ratio on Service Life Behaviour
	1 Introduction
	2 Thermo-Hygro-Mechanical Model
		2.1 Thermal Model
		2.2 Hygrometric Model
		2.3 Mechanical Model and Framework Integration
	3 Numerical Simulation of One-Way Restrained Slab
		3.1 Overall Description of the Case Study
		3.2 Design of Reinforcement
		3.3 Thermo-Hygro-Mechanical Simulation (THMS)
	4 Discussion of Results
		4.1 Thermo-Hygrometric Results
		4.2 Structural Behavior of the Slab
	5 Conclusions
	References
Morphological and Chemical Characterization of Self-Healing Products in MgO Concrete
	1 Introduction
	2 Materials and Methods
		2.1 Materials
		2.2 Sample Preparation and Controlled Cracking
		2.3 Crack Measurement
		2.4 Water Permeability/Sealing Efficiency
		2.5 Characterization of Healing Products/Carbonation Depth
	3 Results and Discussion
		3.1 Controlled Cracking
		3.2 Crack Healing
		3.3 Water Permeability
		3.4 Characterization of Healing Products
	4 Concluding Remarks
	References
Activated CFRP NSMR Ductile Strengthening System
	1 Introduction
	2 Activated Strengthening
		2.1 RC Test Beam Geometry, Applied Loading and Material Properties
	3 Ductile Strengthening System
		3.1 Ductile Anchorage System
		3.2 Flexible Adhesive
		3.3 Mounting of the Ductile Anchored CFRP NSMR Strengthening System
	4 Test Configurations and Results
		4.1 Results
	5 Conclusion
	References