Browsing by Keyword "Active addition"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Obtención de una adición puzolánica a partir de la calcinación controlada de lodos de destintado de papel: Estudio de prestaciones en matrices de cemento(2006-07) Vegas, I.; Frías, M.; Urreta, J.; San José, J. T.; GENERAL; Infraestructuras y Servicios CorporativosMineralogically, the paper mill sludge consists essentially of calcite, kaolinite, talc and other philosilicates (illite, chlorite). When such sludge is subjected to controlled thermal treatment, its kaolinite component may be transformed into metakaolin, yielding a product with high pozzolanic reactivity. This study was designed to analyze a number of scientific questions around the production of pozzolanic additions via controlled thermal activation of paper mill sludge and to evaluate the performance of such additions when included in a cement matrix. The findings show that paper mill waste activation is optimal when the sludge is calcined for 2 hours at 700°C in the 700-800°C intervale. A comparative study between the cement made with the new addition and a commercial cement (CEM I-42.5R) used as a reference led to highlight the scientific and technical viability of this waste as a cementing seconding material.Item Sustainable masonry mortars based on ladle furnace slags from the steel-making industry(University of Cantabria - Building Technology R&D Group, 2020) Santamaría, Amaia; Fiol, Francisco; García, Verónica; Setién, Jesús; González, Javier Jesús; Lombillo, Ignacio; Blanco, Haydee; Boffill, Yosbel; TRAZABILIDAD CIRCULARMasonry mortars are applied to concrete and brickwork to form structural bonds. Partial substitution of their natural raw materials by waste products from the steel industry represents a sustainable approach towards the ecological management of those materials in Spain, where iron and steelmaking is a highly developed heavy industrial sector. Additionally, a somewhat more traditional industrial sector, the building industry, also consumes large amounts of natural resources and energy, likewise resulting in high CO2 emission levels. The present research is focused on solid waste from the steelmaking industry and its addition in significant amounts to masonry mortars. Labelled as “white” slag, the waste (saturated in alumina) is commonly known as ladle furnace slag. To do so, several lab tests are presented, which investigate the partial substitution of fillers and hydraulic binders in regular masonry mortars. Firstly, the study of ladle furnace slag and its overall properties and, secondly, studying the feasibility of producing Ladle Furnace Slag mortars, yielded interesting and positive results.