Sodium silicate solutions from dissolution of glasswastes. Statistical analysis

By M. Torres‐Carrasco, J. G. Palomo, F. Puertas. 2014

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It has studied the solubility process of four different waste glasses (with different particle sizes, 125 µm) in alkaline solutions (NaOH and NaOH/Na₂CO₃) and water as a reference and under different conditions of solubility (at room temperature, at 80°C and a mechano-chemical process). Have established the optimal conditions of solubility and generation of sodium silicates solutions, and these were: the smaller particle size (<45 µm), with NaOH/Na₂CO₃ solution and with temperature during 6 hours of stirring time. The statistical analyses of the results give importance to the studied variables and the interactions. Through ²⁹Si NMR MAS it has confirmed the formation after dissolution processes of monomeric silicate, suitable for use as an activator in the preparation of alkaline cements and concretes.

Subfields: Building and Construction, Ceramics and Composites, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/b986d248f15e09c40f2a55d9d83583b59c25d2d7