Transport Properties of Concrete: Measurements and Applications

Transport Properties of Concrete covers how to measure the ability of ions and fluids to move through concrete material, and how to use the results to model performance. These transport properties largely determine the durability of concrete and of steel embedded within it, as well as the effectiveness of structures such as landfill containment barriers. The book begins by explaining in detail what transport properties are and how to write computer models for transport processes. Early chapters present and explain computer models written in basic code. Coverage then proceeds to a wide range of tests for the transport properties of concrete, and methods for calculating the values for these properties from the test results using analytical and numerical models. The final chapters then show how the values obtained can be used to predict the durability of reinforced concrete, to model the effect of gas pressure, and to model waste containment structures. A number of practical examples are given, in which the calculations and computer models have been applied to real experimental data. Transport Properties of Concrete provides a comprehensive examination of the subject, and will be of use to all concerned with the durability and effectiveness of concrete structures. Provides a detailed understanding of the various transport mechanisms that take place during testing in concreteShows how to obtain fundamental transport properties INDICE: Author contact detailsWoodhead Publishing Series in Civil and Structural EngineeringIntroduction The fundamental equationsComputer codesStructure of this bookExperimental dataSummary of contentsReferences Acknowledgements1. The transport properties of concrete and the equations that describe them Abstract:1.1 Introduction1.2 The transport processes1.3 Processes which increase or reduce the transport1.4 Conclusions1.5 References2. Computer models to predict the transport processes in concrete Abstract:2.1 Introduction2.2 Expressing the basic equations as computer code2.3 Other elements of the code2.4 Example: calculations for a waste containment barrier2.5 Conclusions2.6 Reference3. Surface tests to determine transport properties of concrete - I: the tests Abstract:3.1 Introduction3.2 The initial surface absorption test (ISAT)3.3 The Figg air permeation index3.4 Other tests3.5 Vacuum preconditioning: a development of the ISAT test3.6 Vacuum preconditioning for other tests3.7 Conclusions3.7 References4. Surface tests to determine transport properties of concrete - II: analytical models to calculate permeability Abstract:4.1 Introduction4.2 Additional tests4.3 Modelling of the absorption tests4.4 Experimental testing for absorption4.5 Tests using a vacuum to measure air flow4.6 The choice of test for practical applications4.7 Conclusions4.8 References5. Surface tests to determine transport properties of concrete - III: measuring gas permeability Abstract:5.1 Introduction5.2 Theoretical analysis5.3 Investigation of methods for sealing the drilled holes5.4 Determination of pressure decay profile5.5 Comparison of in situ test methods5.6 Conclusions5.7 References6. Measurements of gas migration in concrete Abstract:6.1 Introduction6.2 Experimental method6.3 Analysis of experimental data6.4 Results for gas permeability of concrete6.5 Comparison with gas permeability of grouts6.6 The effect of interfaces on gas permeability6.7 Discussion6.8 Conclusions6.9 Reference7. Water vapour and liquid permeability measurements in concrete Abstract7.1 Introduction7.2 Experimental methods7.3 Methods of analysis of results7.4 Results and discussion7.5 Conclusions7.6 References8. Measurement of porosity as a predictor of the transport properties of concrete Abstract:8.1 Introduction8.2 Sample preparation and testing programme8.3 Tests for porosity8.4 Tests for properties controlled by transport8.5 Oxygen transport8.6 Vapour transport8.7 Results and discussion8.8 Conclusions8.9 References9. Factors affecting the measurement of the permeability of concrete Abstract:9.1 Introduction9.2 Experimental programme9.3 Results9.4 Discussion9.5 Conclusions9.6 References10. Electrical tests to analyse the transport properties of concrete - I: modelling diffusion and electromigration Abstract10.1 Introduction10.2 The ASTM C1202 test and the salt bridge10.3 The physical processes10.4 Analytical solutions10.5 The computer model10.6 Initial experimental validation10.7 Full model validation10.8 Conclusions10.9 References11. Electrical tests to analyse the transport properties of concrete - II: using a neural network model to derive diffusion coefficients Abstract:11.1 Introduction11.2 Experimental method11.3 Neural network optimisation model11.4 Results and discussion11.5 Conclusions11.6 References12. Electrical tests to analyse the fundamental transport properties of concrete - III: modelling tests without applied voltages Abstract:12.1 Introduction12.2 Test methods12.3 The analytical solution12.4 Computer modelling - theoretical background12.5 Experimental programme12.6 Results and discussion12.7 Conclusions12.8 References13. Applications using measured values of the transport properties of concrete I: predicting the durability of reinforced concrete Abstract13.1 Introduction13.2 Controlling parameters for concrete durability13.3 Measuring corrosion of reinforcement13.4 Correlating transport measurements with corrosion13.5 Predictive models for corrosion13.6 Conclusions13.7 References14. Applications using measured values of the transport properties of concrete II: modelling the effect of gas pressure Abstract:14.1 Introduction14.2 Background: mechanisms of gas migration14.3 The effects of stress generation in cementitious materials14.4 Sensitivity to material properties and conditions14.5 Behaviour in a repository14.6 Conclusions14.7 References15. Applications using measured values of the transport properties of concrete - III: predicting the transport of liquids through concrete barriers for waste containment Abstract:15.1 Introduction15.2 The computer model15.3 Laboratory testing15.4 Site trials15.5 Reducing transport in cracked concrete15.6 Conclusions15.7 ReferencesConclusions, recommendations and guidance for measuring transport properties of concrete The state of the artRecommendations and guidanceAppendix 1: List of papers for the experimental data and derivationsAppendix 2: Notation and abbreviations NotationAbbreviationsIndex

• ISBN: 978-0-08-101421-9
• Editorial: Woodhead Publishing
• Encuadernacion: Rústica
• Fecha Publicación: 30/06/2016
• Nº Volúmenes: 1
• Idioma: Inglés