Thermally Treated Waste Silt as Geopolymer Grouting Material and Filler for Semiflexible Pavements

Considering the future shortage of natural aggregates, various researchers have promoted recycling by-products into asphalt pavement types. This paper a double-recycling technique, where thermally treated waste silt was used as filler for bituminous skeleton and grouting material geopolymer-based semiflexible pavement. Semiflexible pavements (SFP) inherit flexibility common simultaneously benefit from rigidity cement concrete pavements. For this purpose, obtained local plant at 750 °C to produce porous skeleton. Two different materials, including conventional cement-based cement, were material. The geopolymer grout produced by mixing metakaolin (MK), potassium-based liquid hardener calcined filler. grouted samples characterized in terms indirect tensile strength (ITS), modulus (ITSM) moisture sensitivity. use demonstrated promising results comparable control with limestone However, outperformed all aspects. Moreover, addition improved low-temperature fatigue performance