https://hdl.handle.net/10259/11204 2026-05-16T17:32:43Z 2026-05-16T17:32:43Z Alonso Díez, Álvaro Rodríguez Sáiz, Ángel Gadea Sainz, Jesús Gutiérrez González, Sara Calderón Carpintero, Verónica https://hdl.handle.net/10259/11255 2026-01-22T01:05:46Z 2019-01-01T00:00:00Z

Impact of Plasterboard with Ladle Furnace Slag on Fire Reaction and Thermal Behavior Alonso Díez, Álvaro; Rodríguez Sáiz, Ángel; Gadea Sainz, Jesús; Gutiérrez González, Sara; Calderón Carpintero, Verónica The physical and mechanical properties of prefabricated plaster materials prepared with large quantities of white slag as an aggregate replacement are studied in the form of plasterboards for use in construction. The initial characterization results show a reduction in the mechanical strength of the specimens as the amount of white slag increases, but the material maintains flexural values over 260 N with a 60% substitution of gypsum by white slag when a plasticizer additive is incorporated. The flexural values reach a level well above the 100 N needed per international standards. The thermal behavior at different doses of white slag is also studied with plasterboard specimens with dimensions of (300 × 400 × 15) mm. The heat transference coefficient by wall-air convection has values from 2.76 W/m2°C to 12.01 W/m2°C, which allows assessment of the thermal conductivity of these materials as a function of the amount of slag present in the mixtures. Non combustibility is discussed on the basis of experimental data obtained from two standard test methods: EN ISO 1716 with an oxygen bomb calorimeter and EN ISO 1182 with a cylindrical furnace. The fire response improves substantially as the slag byproduct from the steelmaking industry is incorporated compared to that of the behavior of the reference plaster, although there is a reduction in mass loss of up to 50%. This result could indicate an important advantage for these products for partitions or protection in areas with aggressive thermal requirements.

2019-01-01T00:00:00Z Arroyo Sanz, Raquel Gutiérrez González, Sara González Moreno, Sara Alameda Cuenca-Romero, Lourdes Alonso Díez, Álvaro Calderón Carpintero, Verónica https://hdl.handle.net/10259/11208 2026-01-14T01:05:39Z 2021-12-01T00:00:00Z

Adoquines de cemento aligerados con residuos poliméricos industriales Arroyo Sanz, Raquel; Gutiérrez González, Sara; González Moreno, Sara; Alameda Cuenca-Romero, Lourdes; Alonso Díez, Álvaro; Calderón Carpintero, Verónica Se espera que el consumo mundial de recursos como la biomasa, los combustibles fósiles, los metales y los minerales se duplique en los próximos años (Organización para la Cooperación y el Desarrollo Económicos [OCDE], 2018), mientras que se prevé que la generación anual de residuos en Europa aumente un 70 % para 2050 (Kaza et al., 2018). Por ello, es necesaria una transición hacia un sistema económico y productivo sostenible como parte de las nuevas estrategias industriales. Estudios recientes estiman que la aplicación de los principios de la economía circular tiene el potencial dede mejorar los procedimientos de ingeniería creando nuevos puestos de trabajo cualificados. Más del 80% del impacto medioambiental de los materiales de construcción se determina en la fase de diseño (Comisión Europea, 2019). Muchos subproductos se descomponen demasiado rápido y no pueden reciclarse sin más, y muchos se fabrican para un solo uso. Junto con esta condición, las políticas de gestión proporcionan normas mundiales hacia la sostenibilidad de los materiales de construcción (Taurino, Bondioli, & Messori, 2023).Con el objetivo de caracterizar estos adoquines ecosostenibles, también se han realizado diferentes ensayos de durabilidad como congelación-descongelación y cristalización salina, estableciendo la resistencia a la compresión antes y después del ensayo, confirmando las propiedades idóneas para ser utilizados en diferentes ambientes exteriores; Global consumption of resources such as biomass, fossil fuels, metals and minerals is expected to double in the next years (Organisation for Economic Co-operation and Development [OECD], 2018), while annual waste generation in Europe is projected to increase by 70% by 2050 (Kaza et al., 2018). For this reason, it is necessary a transition to a sustainable economic and productivesystem as part of the new industrial strategies. Recent studies estimate that applying circular economy principles has the potential to improve the engineering procedures creating new qualified jobs. More than 80% of construction materials’ environmental impacts are determined at the design phase (European Commission, 2019). Many by products break down too fast and cannot be simply recycled, and many are made for single use only. Together with this condition, the management policies provide world-wide standards towards construction materials sustainability (Taurino, Bondioli, & Messori, 2023).With the aim of characterize this eco sustainable cobblestones, different durability tests have also been carried out as freeze-thaw and crystallization salt, establishing the compressive strength before and after the test, confirming the suitable properties to be used in different – outdoor – environments

2021-12-01T00:00:00Z Alonso Díez, Álvaro Calderón Carpintero, Verónica Rodríguez Sáiz, Ángel https://hdl.handle.net/10259/11207 2026-01-14T01:05:37Z 2021-12-01T00:00:00Z

Comportamiento térmico de placas ecológicas de yeso con escorias blancas de acería Alonso Díez, Álvaro; Calderón Carpintero, Verónica; Rodríguez Sáiz, Ángel El presente estudio analiza el comportamiento térmico de placas de yeso fabricadas con adición de escorias blancas de Horno Cuchara LF, con sustituciones progresivas de yeso por escoria del 20%, 40%, 60%, 80%. Se estudia la reacción al fuego, la termogravimetría y la conductividad térmica en placas de yeso de (300 × 400 ×15) mm³. La adición de escorias blancas produce en las placas una variación significativa en los valores de conductividad térmica y del coeficiente de transferencia de calor por convección pared-aire, provocado por el aumento de la densidad y una mayor compactación del material y, por lo tanto, un menor aislamiento térmico. Asimismo, la respuesta frente al fuego y al incremento del calor mejora sustancialmente a medida que se incorpora mayor cantidad de escoria blanca, lo que produce una reducción en los valores de pérdida de masa muy relevante. Esto supone una ventaja para el uso en tabiques o protección en áreas industriales o con ambientes térmicos agresivos.; This study analyzes the thermal behavior of gypsum boards made with the addition of white slag from Horno Cuchara LF, with progressive substitutions of gypsum for slag of 20%, 40%, 60%, 80%. The reaction to fire, thermogravimetry and thermal conductivity in (300 × 400 × 15) mm³ plasterboard are studied. The addition of white slag produces in the plates a significant variation in the values of thermal conductivity and the coefficient of heat transfer by wall-air convection, caused by the increase in density and greater compaction of the material and, therefore, less thermal insulation. Likewise, the response to fire and to the increase in heat improves substantially as more white slag is incorporated, which produces a very relevant reduction in mass loss values. Thisis an advantage for use in partition walls or protection in industrial areas or with aggressive thermal environments.

2021-12-01T00:00:00Z Husanu, Francisca Alonso Díez, Álvaro Calderón Carpintero, Verónica Castellote, Marta Nevshupa, Roman https://hdl.handle.net/10259/11206 2026-01-14T01:05:48Z 2024-08-01T00:00:00Z

Quantitative study of triboemission kinetics from polymer fiber-reinforced mortar paving blocks: Unravelling the dynamics of nanoparticle aerosol release Husanu, Francisca; Alonso Díez, Álvaro; Calderón Carpintero, Verónica; Castellote, Marta; Nevshupa, Roman Triboemission of nanoparticle aerosols from construction materials is a growing concern due to its potential impact on air quality and human health. In this study, we investigated the effect of aggregation of polyurethane fibers (PUFs) proceeding from waste on the kinetics of triboemission in cement mortars. A quantitative methodology was employed to assess the deposition rate, particle size distribution, and emissivity for the aerosols within the particle aerodynamic diameter range of 10–400 nm. The triboemission properties were correlated with the pore structure, morphology and tribochemical transformations of the particles and worn surfaces. Our results highlight the intricate influence of PUF aggregation on the kinetics of triboemission in cement mortars through both direct and indirect mechanisms and provide valuable insights into the mechanisms governing triboemission in construction materials.

2024-08-01T00:00:00Z