Civil Engineering Association

Pore structure of cement-based materials : testing interpretation & requirements

Summary:
This book provides a clear introduction to the various experimental techniques used for characterizing the pore structure of hardened cement-based materials. It begins with a comprehensive outline of the traditional and the recently-developed techniques for determining the pore structure of hardened cement paste, and continues with a discussion of the methods used for air-void analysis in air-entrained concrete. Directed to the student and engineer, this volume serves as a useful introduction to the topic of microstructure characterization, and provides a comprehensive set of references for further information.

Contents:
Introduction. Pores in Cement Paste. Methods for Characterizing Pore Structure. Definition of Pore Structure Parameters. Specimen Pretreatment Techniques. Drying Techniques. Solvent Replacement. Preparation for Microscopic Analysis. Mercury Intrusion Porosimety. Theory and Testing Procedure. Plots Obtained. Range of Sizes Determined. Hysteresis in Pore Size Distribution. Advantages and Limitations. Gas Adsorption. Theory and Testing Procedure. Analysis of Data. Range of Sizes Determined. Adsorption Hysteresis. Different Adsorbates Used. Advantages and Limitations. Displacement Methods. Evaporable Water Content. Solvent Exchange. Helium Pycnometry. Nuclear Magnetic Resonance. Instrumentation. Theoretical Aspects. Pore Size Determination. Magnetic Resonance Imaging. Advantages and Limitations. Small Angle Scattering. Theoretical Aspects. Experiment and Analysis. Plots Obtained. Range of Sizes Determined. Advantages and Limitations. Microscopic Techniques. Optical Microscopy. Electron Microscopy. Stereological Methods for Air Void Analysis. Comparison of Results Obtained by Various Techniques. Comparison with Mercury Intrusion Porosimetry. Comparison with Nitrogen Adsorption. Comparison with Replacement Techniques. Comparison with Microscopic Techniques.

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