Moisture Storage and Transport in Concrete explores how moisture moves through cementitious materials, focusing on its absorption, storage, and distribution with the help of experimental investigations and computer simulations. The text discusses the different ways moisture moves, such as through vapor or capillary action, as well as how it affects the properties of cement-based materials, offering new insights and models to help understand and predict moisture behavior in these materials, which can be important for construction and maintenance.
After a short introduction to the topic, the text is split into five chapters. Chapter 1 covers surface energetic principles for moisture storage in porous materials. Chapter 2 explores real pore structure and calculation methods for composition parameters. Chapter 3 explains basic equations for the description of moisture transport. Chapter 4 discusses experimental investigation results with regard to the modeling of moisture transport in concrete materials. Chapter 5 showcases modeling of moisture transport, taking into account sorption hysteresis and time-dependent material changes.
Written by a highly qualified author, Moisture Storage and Transport in Concrete also includes discussion on: - Dependence of surface energy of water on temperature, on relative humidity of air, and for aqueous salt solutions- Calculation of the pore size dependent distribution of inner surfaces using the moisture storage function- Temperature influence on the capillary transport coefficients and differences between capillary pressure and hydraulic external pressure- Adsorption and desorption isotherms of the CEMI reference material and causes of differences between adsorption and desorption isotherms- Sorption isotherms and scanning isotherms of hardened cement paste and concrete- Modeling of vapor transport and drying by evaporation of concrete
Moisture Storage and Transport in Concrete is an essential reference to help researchers and professionals to make informed decisions for the construction of concrete-based infrastructure, enabling them to avoid common issues such as corrosion of reinforcement steel, deterioration of concrete strength, and the growth of mold and mildew.
Table of Contents
Preface xi
1 Surface Energetic Principles for Moisture Storage in Porous Materials 1
1.1 Introduction 1
1.2 Surface Energy and Spreading of Liquids on Solid Surfaces 3
1.3 Basic Equations for Liquid Absorption in Material Pores 10
1.4 Sorptive Storage on Material Surfaces and on the Inner Surface of Pore Systems 22
2 Real Pore Structure and Calculation Methods for Composition Parameters 65
2.1 Illustration of the Pore Structure of Selected Materials 65
2.2 Calculations on Porosity, Degree of Hydration, and Material Densities 77
3 Basic Equations for the Description of Moisture Transport 103
3.1 Moisture Flows at the Volume Element 103
3.2 Base Modeling of Moisture Transport 122
3.3 Structure of the Simulation Program 128
4 Experimental Investigations with Regard to the Modeling of Moisture Transport in Mortars and Concrete 133
4.1 Preliminary Remarks on Moisture Storage 133
4.2 Concrete Data for the Experimental Investigations 134
4.3 Data on Porosity of the Considered Materials and Influence of Treatments on Porosity 135
4.4 Hysteretic Moisture Storage Behavior as Important Issue with Respect to Modeling 150
4.5 Water Storage Behavior Under Changing Moisture Boundary Conditions with Consideration of the Air-Pore Content 155
4.6 Adsorption and Desorption Isotherms 182
4.7 Results on CapillaryWater Absorption Depending on Initial Water Content and Time 231
5 Modeling of Moisture Transport Taking into Account Sorption Hysteresis and Time-Dependent Material Changes 251
5.1 Preliminaries 251
5.2 Modeling of Capillary Transport 251
5.3 Modeling of Vapor Transport and Drying by Evaporation of Concrete 270
5.4 Realistic Modeling of Drying by Evaporation for Ceramic Bricks, Calcium Silicate Products, and Porous Concrete 297
References 305
Bibliography 307
Index 331
