Relations between the crystal structures of calcium silicates and their reactivity against water

✍ Scribed by K.H. Jost; B. Ziemer

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 446 KB
• Volume: 14
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(84)90102-9

✦ Synopsis

In the crystal structures of all calcium silicates which are reacting with water, and only in these, there are infinite building units of CaO x polyhedra linked by face-sharing. Resting on Pauling's rules on the stability of ionic compounds, a hypothesis is developed why this structural feature makes the reaction with water easier. The influence of thermal history of reactive phases and their content of foreign oxides on their reactivity is discussed.

Vol. 14, No. 2 K.H. Jost and B. Ziemer Table l Crystalline Phases in the System CaO-SiO 2 I Remarks on the Phase Reactive Constitution Crystal Structures and Literature yes Ca30[SiO 4] C3S C2S c~s8 Ranklnlte C3S2 Kilchoanite CS Cyclo-Wollastonite CS Chain-Wollastonite yes yes yes yes no no no no no Ca2[SiO 4] Ca3[Si207 ] Ca6[(Si04)(Si3010)] Ca3[Si309] (Ca[Si03]) x