Mechanical and microstructural properties of high-calcium fly ash geopolymer mortar with warm-weather conditions for pavement overlays

Key Points

• Geopolymer mortar exhibits significant mechanical properties under warm-weather conditions, enabling effective pavement overlays.
• The compressive strength of the mortar reached up to 50 MPa, indicating its robustness for infrastructure applications.
• Assessment of microstructural properties reveals dense packing and reduced porosity in the mortar, enhancing durability and performance.
• Such insights support the viability of fly ash geopolymer mortar for sustainable construction practices, especially in warm regions.