## Microstructure of cement-based systems/Bonding and interfaces in cementitious materials: symposia held November 28-December 1, 1994, Boston, Massachusetts, U.S.A.This book continues the MRS series on characteristics and properties of cementitious materials. In Part I, recent advances in microstructure and related characterization of cementitious systems are the focus. Topics include: microstructures of "normal" cement systems; microstructure of 'unusual' cement systems; image analysis, modelling and fractal analysis applications; and assessment of pore structures. Part II features presentations on interfacial microstructures, as well as information on elastic and fracture properties, transport properties, and the effects of interfaces on fiber-reinforced systems. |

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Page 81

We found there was still some spurious noise which was cleared up with use of a

median filter n- The final stage removed the unphysical presence of a band of

We found there was still some spurious noise which was cleared up with use of a

median filter n- The final stage removed the unphysical presence of a band of

**sand**surrounding air voids. This is due to the interpolation of the attenuation ...Page 409

Thus: log £„ = V, log E,+ Vp log Ep + V, log E, ( 1 ) where E„ is dynamic modulus

of elasticity of mortar (determined experimentally) E, is dynamic modulus of

elasticity of

of ...

Thus: log £„ = V, log E,+ Vp log Ep + V, log E, ( 1 ) where E„ is dynamic modulus

of elasticity of mortar (determined experimentally) E, is dynamic modulus of

elasticity of

**sand**(determined experimentally) Ep is dynamic modulus of elasticityof ...

Page 416

where the effective density pejf is related to the densities of the cement paste and

of the cement paste is uniform; more sophisticated models might attempt to ...

where the effective density pejf is related to the densities of the cement paste and

**sand**inclusions by pe//=(l-c)pcp +cp,„ . (8) Note that we are assuming that densityof the cement paste is uniform; more sophisticated models might attempt to ...

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### Contents

APPLICATION OF AUTOMATED IMAGE ANALYSIS TO | 3 |

A REEVALUATION OF HARDENED CEMENT PASTE | 13 |

AN APPROACH TO QUANTITATIVE IMAGE ANALYSIS | 23 |

Copyright | |

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1995 Materials Research air voids andesite bond strength bulk cement paste C-S-H gel calcium calcium hydroxide carbonate cement paste chemical clinker composite compressive strength concentration Concr crack crystals cured curve debonding decrease density diameter dielectric dielectric constant diffusion dynamic modulus effect elastic elastic moduli embedded length energy ettringite experimental fiber reinforced fibres fly ash fracture surface Garboczi grains groundmass hardened hydration products image analysis increase interfacial transition zone interfacial zone layer load Materials Research Society matrix measured microcracks microscope microstructure mixes modulus mortar observed parameters permeability phase phenograins pore size distribution porosity porous portland cement portlandite Proc pullout rock samples sand scanning electron microscope shear shown in Figure shows silica fume solution specimens structure sucrose superplasticizer Symp Table tensile thaumasite thickness values volume fraction w/c ratio water-cement ratio wood fiber zeolite