Gyrolite Formation in CaO–SiO2źnH2O–gamma-Al2O3–Na2O–H2O System under Hydrothermal Conditions

• Autorzy: Baltakys K. , Siauciunas R.
• Języki publikacji: EN

Abstrakty

EN

The influence of gamma-Al2O3 and Na2O additives on the gyrolite formation process in the CaO–SiO2źnH2O–H2O mixture has been examined. It has been proved that gamma-Al2O3 is not recommended for the synthesis of gyrolite, because Al3+ ions stimulate the formation of C-S-H(I) and 1.13 nm tobermorite (where C – CaO, S – SiO2 and H – H2O). Na2O positively affects the formation of gyrolite: this compound is formed already after 8 hours of isothermal curing at 200 graduate C. On the contrary, in the pure mixtures gyrolite formed after only 32 h at 200 graduate C. In order to compare the cation exchange activity of synthesized gyrolite with (Al+Na)-substituted tobermorite, the ion exchange experiments were employed as a test reaction.

Słowa kluczowe

EN

gyrolite; Z-phase; 1.13 nm tobermorite; pectolite; calcium silicate hydrate

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2007
• Tom: Vol. 81, nr 1
• Strony: 103--114
• Opis fizyczny: Bibliogr. 26 poz., rys.

Twórcy

autor

Baltakys K.

autor

Siauciunas R.

• Department of Silicate Technology, Kaunas University of Technology, Radvilenu pl. 19, LT – 50254 Kaunas, Lithuania

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