Influence of Wood-Based Biomass Ash Admixing on the Structural, Mechanical, Hygric, and Thermal Properties of Air Lime Mortars

摘要: Mechanically-activated wood-based biomass ash (WBA) was studied as a potential active admixture for design of novel lime-pozzolan-based mortar renovation purposes. The replacement ratio lime hydrate in mix composition 5%, 10%, and 15% by mass. water/binder the sand/binder were kept constant all examined mixes. Both binder constituents characterized their powder density, specific BET (Brunauer–Emmett–Teller), Blaine surfaces. Their chemical measured X-ray fluorescence analysis (XRF) mineralogical performed using diffraction (XRD). Morphology WBA investigated scanning electron microscopy (SEM) element mapping an energy dispersive spectroscopy (EDS) analyzer. pozzolanic activity tested Chapelle test assessment Portlandite content used simultaneous thermal (STA). For hardened samples, complete set structural, mechanical, hygric, parameters experimentally determined. mortars with admixing yielded similar or better functional properties than those obtained traditional pure lime-based plaster, pointing to presumed application rendering walling mortars. As test, STA, mechanical proved high pozzolanity WBA, it classified alternative eco-efficient low-cost pozzolan use blend-based building materials. savings CO2 emissions partial substitute also highly appreciated respect sustainability construction industry.