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1 Materials Science Poland

1 2006

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Influence of tribomechanical milling and activation of primary mixtures on the synthesis of calcium silicate hydrates

Palubinskaite D., Kantautas A.

Materials Science Poland

2006

Vol. 24, No. 2/1

395--403

Tobermorite group minerals with double [Al3++Na+] substitution, using non grind row minerals mixture and grind mixtures in the colloidal mill were syntheses. Calcium silicate hydrate synthesis is going on more intense, when dry primary mixtures ground in a colloid mill are taken, because, having the same synthesis conditions, the compositions of higher crystal degree are synthesized. In this case after 24 h tobermorite forms itself. It is thought, that grinding in a colloid mill a mixture of CaO; SiO2 and Al2O3 some activation centres are induced, which later in the process of hydrothermal processing activate the process of synthesis run. It is reasonable to grind in colloid mill the dry component mixtures, used for synthesis of tobermorite, before hydrothermal processing, until optimum. In the research conditions given the tobermorite formed more intense when original surface was less: S = 547 m2/kg. It is not expedient to use mixtures of smaller primary materials, because stabilizing influence of C-S-H(I) on over forming kinesis of tobermorite displayed itself.