Examinando por Materia "Aggregates"
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Publicación Comportamiento de una mezcla asfáltica en frio elaborada con arcilla expandida(Universidad EAFIT, 2025) Rodríguez Useche, Bladimir de Jesús; Vidal Valencia, JuliánThe increasing need to use alternative aggregates to replace natural stone aggregates in the production of asphalt mixtures has led the road construction industry to evaluate the behavior of new materials, including expanded clays. This research evaluates the physical and mechanical behavior in the laboratory of a cold asphalt mixture (CMA) made with expanded clay, in which the natural aggregates were completely replaced by Arlita, expanded clay, and the bulk density, void percentage, permeability, abrasion loss, indirect traction, resilient modulus, elastic modulus and permanent deformation were measured. A comparative method was used to analyze the experimental results with the general specifications for road construction of the National Institute of Roads of the Republic of Colombia (INVIAS); the document also presents the benefits and limitations of the asphalt mixture.Ítem Seismic risk assessment for the residential buildings of the major three cities in Colombia: Bogotá, Medellín, and Cali(EARTHQUAKE ENGINEERING RESEARCH INST, 2020-01-01) Acevedo A.B.; Yepes-Estrada C.; González D.; Silva V.; Mora M.; Arcila M.; Posada G.; Mecánica AplicadaThis study presents a seismic risk assessment and a set of earthquake scenarios for the residential building stock of the three largest metropolitan centers of Colombia: Bogotá, Medellín and Cali (with 8.0, 2.5, and 2.4 million inhabitants, respectively). A uniform methodology was followed for the development of the seismic hazard, vulnerability, and exposure models, thus allowing a direct comparison between the seismic risk of the different cities. Risk metrics such as exceedance probability curves and average annual losses were computed for each city. The earthquake scenarios were selected considering events whose direct economic impact is similar to the aggregated loss for a probability of exceedance of 10% in 50 years. Results show a higher mean aggregate loss ratio for Cali and similar mean aggregate loss ratios for Bogotá and Medellín. All of the models used in this study are openly accessible, enabling risk modelers, engineers, and stakeholders to explore them for disaster risk management. © The Author(s) 2020.Ítem Seismic risk assessment for the residential buildings of the major three cities in Colombia: Bogotá, Medellín, and Cali(EARTHQUAKE ENGINEERING RESEARCH INST, 2020-01-01) Acevedo A.B.; Yepes-Estrada C.; González D.; Silva V.; Mora M.; Arcila M.; Posada G.; Acevedo A.B.; Yepes-Estrada C.; González D.; Silva V.; Mora M.; Arcila M.; Posada G.; Universidad EAFIT. Departamento de Ingeniería de Producción; Materiales de IngenieríaThis study presents a seismic risk assessment and a set of earthquake scenarios for the residential building stock of the three largest metropolitan centers of Colombia: Bogotá, Medellín and Cali (with 8.0, 2.5, and 2.4 million inhabitants, respectively). A uniform methodology was followed for the development of the seismic hazard, vulnerability, and exposure models, thus allowing a direct comparison between the seismic risk of the different cities. Risk metrics such as exceedance probability curves and average annual losses were computed for each city. The earthquake scenarios were selected considering events whose direct economic impact is similar to the aggregated loss for a probability of exceedance of 10% in 50 years. Results show a higher mean aggregate loss ratio for Cali and similar mean aggregate loss ratios for Bogotá and Medellín. All of the models used in this study are openly accessible, enabling risk modelers, engineers, and stakeholders to explore them for disaster risk management. © The Author(s) 2020.