Foreword.- 1 Introduction.- 1.1 General comments.- 1.2 Context and objectives.- 1.3 Contents.- References.- 2 Degradation Reactions In Concretes Exposed To High Temperatures.- 2.1 Methodologies to identify the degradation processes of heated concrete at microstructural level.- 2.2 Thermal Analytical Reactions of concrete components.- 2.3 Physical transformations at microstructural level.- 2.4. Thermal Changes.- References.- 3 Mass Transport Properties.- 3.1 Introduction.- 3.2 Evolution of permeability after heating.- 3.3 Discussion.- 3.4 Conclusion.- References.- 4 Thermal Properties.- 4.1 Thermal conductivity.- 4.2 Heat capacity.- 4.3 Thermal diffusivity.- References.- 5 Mechanical Properties.- 5.1 Introduction.- 5.2 Test methods.- References.- 5.3 Stress-strain-relation, compressive strength and modulus of elasticity.- References.- 5.4 Steady state creep and creep recovery.- References.- 5.5 Thermal strain, transient thermal strain and restraint forces.- References.- 5.6 Tensile strength.- References.- 6 Conclusion.