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Virtual Cement. Chapter 10.3.


pdf icon Virtual Cement. Chapter 10.3. (596 K)
Bullard, J. W.; Ferraris, C. F.; Garboczi, E. J.

Innovations in Portland Cement Manufacturing. Chapter 10.3, Portland Cement Association, Skokie, IL, Bhatty, J. I.; Miller, F. M.; Kosmatka, S. H., Editor(s), 1311-1331 p., 2004.

Keywords:

cements; concretes; hydration; elastic properties; rheology; particle size distribution

Abstract:

Cementitious materials, including cement paste, mortar, and concrete, possess great chemical and structural complexity. Chemically, cement pastes contain many chemical components and mineral phases.Many of these phases can be amorphous or poorly crystalline, with metastable solid solution compositions varying over a fairly wide range. Dozens of chemical hydration reactions may occur simultaneously at rates that vary from region to region within the material. Structurally, a cementitious material is a random composite structure on length scales from nanometers to millimeters, and the contrast in various physical properties among the different composite phases is often quite large. One would be hard pressed to find a system that even approaches this range of complexity from among other classes of engineering materials such as ceramics and metals.