Marl-based geopolymers incorporated with limestone: A feasibility study

摘要: Abstract The expanding raw materials base is one of the drivers for further development inorganic binders, including alkali-activated cements. This research focuses on studying marl with a high calcite/aluminosilicates ratio as geopolymer precursor, and limestone mineral addition to this geopolymer. calcination at 800 °C resulting in formation reactive Si, Al, Ca due dehydroxylation clay minerals decarbonation calcite makes suitable use precursor. Calcined activated sodium silicate cured ambient temperature had 28-day compressive strength 34 MPa. When incorporated 50% limestone, became 39.2 MPa. XRD, TG/DSC, FTIR, optical SEM have been used investigate reaction products, well microstructure hardened pastes.