Search

La presente investigación tiene como objetivo evaluar el efecto de variables experimentales en el estudio de la degradación por cloruros de concretos reforzados con fibras de acero (SFRCs). La información fue recopilada de diferentes fuentes literarias para después ser tratada mediante el diseño experimental de Taguchi y análisis de regresión. Los resultados muestran que los factores más influyentes en la degradación de SFRCs degradados por cloruro son la carga durante la degradación y el ancho de fisura, factores que impactan estadísticamente sobre resistencia residual y la carga máxima a flexión. Sin embargo, otros como la relación agua/cemento, el volumen de fibras, la concentración de cloruros y el tiempo de degradación demostraron poca influencia sobre la respuesta mecánica de los SFRCs.

The separation of ethanol, propanol, and butanol from aqueous solutions was studied using adsorption on bone char. Adsorption kinetics and thermodynamic parameters of this separation method were studied at different conditions of pH and temperature. Results showed that the maximum adsorption capacities of these bioalcohols were obtained at pH 6 and 20°C. An exothermic separation was identified, which can be mainly associated to hydrophobic interactions between bone char surface and bioalcohols. Binary adsorption studies were also performed using mixtures of these bioalcohols. An antagonistic adsorption was observed for all bioalcohols where the ethanol and propanol separation was significantly affected by butanol. A model based on an artificial neural network was proposed to correlate both single and binary adsorption isotherms of these bioalcohols with bone char. It was concluded that the bone char could be an interesting adsorbent for the sustainable separation and recovery of bioalcohols from fermentation broths, which are actually considered emerging liquid biofuels and relevant industrial chemicals.