Use the waste glass for the synthesis of geopolymer-zeolite composites

Abstract

The study investigates the properties of alkali-activated binders with waste glass (WG) under hydrothermal treatment. WG was dosed in 0-30 wt.% and was used as a substitute for raw materials. Solid precursors were mixed with sodium water glass. The prepared specimens were cured in ambient conditions (20°C and RH 98%) and hydrothermal conditions (105°C and 150°C). The effect of glass and hydrothermal treatment on physical and mechanical properties after 2, 7, 28, 56, 90 and 180 days was monitored. Prepared hybrid zeolite-geopolymer materials were characterised by X-ray diffraction analysis, SEM, and MIP. It was confirmed that replacing raw materials with glass up to 20 wt.% did not deteriorate long-term properties under ambient conditions. The positive effect of hydrothermal curing was manifested, especially at a temperature of 150°C, when 20 wt.% glass was used.