Abstract: SEM shows that flowers-and-like sodium carbonate exists on the
surface of sodium silicate sand grains when hardened by carbon
dioxide, baculiform sodium acetate exists not only in sand
surface but also inside sodium silicate film when hardened by
ester method. The strength of sodium silicate sand mainly
depends on the point-bridge connecting strength of dewatered
sodium silicate film. The performance of reclaimed sodium
silicate sand is determined by the extent of which salinous
crystal is eliminated and reasonableness of relevant
technological methods.
Key words: Sodium
silicate sand Structure Reclamation
*
This project
is supported by Science and Technology Commission of Jiangsu Province. Manuscript received on
September 2, 1997; revised manuscript December 25, 1997
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