Ceramic calcium sulphate

Fig. 6.63 Appearance of normal features not subjected to sulphate attack A—unhydrated cement, B—dense inner C-S-H gel surrounding unhydrated cement, C—inner C-S-H gel constituting fully hydrated cement grain, D— region of small hollow shell hydration grains, E—groundmass or outer product C-S-H gel, F—Ca(OH)j surrounding a sand grain chip, G—deposit of calcium hydroxide within the groundmass (After [261]) Diamond S., Lee R.J. in Materials Science and Concrete, Special volume Sulfate Attack Mechanisms (J. Marchand amd J. Skalny eds.), p. 138, Fig. 1, 1999, published by The American Ceramic Society, 735 Ceramic Place, Westerville, Ohio 43081, 2001, reproduced with the permission of The American Ceramic Society...

---