Moisture Storage and Transport in Concrete

Combining experimental results and computational modeling, the book provides deep insights into moisture storage and transport in cementious materials that help researchers and professionals to make informed decisions for the construction of concrete-based infrastructure.

Autorentext

Lutz H. Franke, Dr.-Ing., is retired Professor of Engineering in and former Head of the Institute for Construction Materials, Building Physics, and Building Chemistry at the Hamburg University of Technology.

Klappentext

Comprehensive insight on moisture transport in cement-based materials by means of experimental investigations and computer simulations 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.

  Inhalt
  Preface

  SURFACE ENERGETIC PRINCIPLES FOR MOISTURE STORAGE IN POROUS MATERIALS
  Introduction
  Surface-Energy and Spreading of Liquids on Solid Surfaces
  Basic Equations for Liquid Absorption in Material Pores
  Sorptive Storage on Material Surfaces and on the Inner Surface of Pore Systems

  REAL PORE STRUCTURE AND CALUCLATION METHODS FOR COMPOSITION PARAMETERS
  Illustration of the Pore Structure of Selected Materials
  Calculations on Porosity, Degree of Hydration and Material Densities

  BASIC EQUATIONS FOR THE DESCRIPTION OF MOISTURE TRANSPORT
  Moisture Flows at the Volume Element
  Base Modeling of Moisture Transport
  Structure of the Simulation Program

  EXPERIMENTAL INVESTIGATIONS WITH REGARD TO THE MODELING OF MOISTURE TRANSPORT IN MORTARS AND CONCRETE
  Preliminary Remarks on Moisture Storage
  Concrete Data for the Experimental Investigations
  Hysteretic Moisture Storage Behavior as Important Issue with Respect to Modeling
  Water Storage Behavior under Changing Moisture Boundary Conditions with Consideration of the Air-Pore Content
  Adsorption and Desorption Isotherms
  Results on Capillary Water Absorption Depending on Initial Water Content and Time

  MODELING OF MOISTURE TRANSPORT TAKING INTO ACCOUNT SORPTION HYSTERESIS AND TIME-DEPENDENT MATERIAL CHANGES
  Preliminaries
  Modeling of Capillary Transport
  Modeling of Vapor Transport and Drying by Evaporation of Concrete
  Realistic Modeling of Drying by Evaporation for Ceramic Bricks, Calcium Silicate Products and Porous Concrete

  The Complete Bibliography