Browsing by Author "Esteban, Alberto"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Hollow ceramic brick walls in Southern Europe dwellings: Limitations and future perspectives of use(2003-05) Cortes, Azucena; Esteban, Alberto; Centros PRE-FUSION TECNALIA - (FORMER)Hollow clay brick walls are one of the most common materials used for building construction, in many southern Europe countries like Italy or Spain. This particular way of construction is based on several different factors: raw material availability, thermal insulation requirements, need to reduce weight or simply 'tradition'. Future new building regulations, looking for a higher level of comfort in dwellings, are increasing the sound insulation requirements in dwellings (For instance, in Spain from 45 dB in laboratory up to 50 dB in situ). Current hollow clay bricks are pushed to improve their acoustical features to compete with other materials. This paper presents some experiences about the procedures for optimisation of the sound insulation of hollow brick walls, based on the combination of experimental work developed in laboratory and using mathematical models.Item The relation among noise mapping values, Façade sound insulation of dwellings and annoyance due to noise from neighbours or traffic(2005) Fuente, Marta; Cortés, Azucena; Esteban, Alberto; Herranz, Karmele; ECOEFICIENCIA DE PRODUCTOS DE CONSTRUCCIÓN; Mercado; Centros PRE-FUSION TECNALIA - (FORMER); CALIDAD Y CONFORT AMBIENTALProtection against noise (external or from neighbours) is one of the main comfort demands of residents. Concerned about this problem, governments introduce building regulations as the way to enforce minimum comfort levels. In addition, some countries establish classification schemes in order to offer higher levels of comfort and intimacy. The acoustical quality of dwellings in Spain is guaranteed up to date with the compliance of the Building Regulation NBE-CA88, which establish laboratory requirements to each construction element. However, the new Spanish Building Regulation (CTE) will consider the whole building as a product itself, with 'in situ' requirements. This paper shows a research about the results of 'in situ' sound insulation in current State Subsidized Housings of Basque Country (Spain) and their residents perception obtained by means of surveys. The aim is not only to know the acoustical quality in current dwellings from the point of view of present and future Regulations, but also to analyze the possible necessity of new requirements in accordance with the annoyance of dwellers. The aim is not only to fulfil the Standards, but also to protect the residents under a comfort point of view.Item SIDERURGICAL MORTARS IN SPAIN: REHABILITATION OPPORTUNITIES AND AN OVERVIEW OF PROGRESS(University of Cantabria - Building Technology R&D Group, 2022) Santamaría, Amaia; Esteban, Alberto; Skaf, Marta; García-Cortés, Verónica; González, Javier Jesús; Blanco, Haydee; Boffill, Yosbel; Lombillo, Ignacio; TRAZABILIDAD CIRCULARIn the present paper, waste products from the steel-making industry are reused as fine raw material in rehabilitation mortars for construction works. Two cement mixes are evaluated: Masonry mortars and structural mortars. The study is focused on two steel-making by-products: Electric arc furnace slag and ladle furnace slag. The mortar design proposed here incorporates the former in partial substitution of fine aggregates (sand) and the ladle furnace slag in partial substitution of Portland cement and, in some cases, as aggregate (filler). Several partial substitutions of mortar binders/aggregates were prepared which yielded different mixes: 8 masonry mortars whose compressive strengths were below 20 MPa and 12 structural mortars whose compressive strengths were over 50 MPa. At the lab scale, various physical and chemical tests were performed on batches in both the fresh and the hardened state (densities, spreading, mechanical strength, porosity and weathering studies). Our results fully support the use of these siderurgical mortars for architectural (non-structural) rehabilitation purposes and in structural refurbishments for strengthening reinforced concrete elements.