Thermal Resistance and Microstructural Response of Metakaolin- and Fly Ash–Based Geopolymers Modified with Nanosilica

Abstract

AbstractIn this work, the influence of nanosilica (NS) addition on the thermal and mechanical stability of metakaolin (MK)- and fly ash (FA)–based geopolymers at high temperatures (300°C, 600°C, and 900°C) is studied. A total of 16 mixes were produced by ...Practical ApplicationsThis study provides actionable guidance for specifying heat-resistant geopolymer mortars in fire-exposed or high-temperature works (≈300°C–900°C) such as industrial floors, furnace surrounds, tunnel linings, and fire-rated panels. ...