Durabilidad del hormigón por ataque ácido en estaciones depuradoras de aguas residuales. Casos prácticos de diagnóstico

This paper presents the conclusions of experimental studies carried out for the diagnosis of the damages detected in concrete elements of various wastewater treatment plants. The results show that generally the severe surface deterioration observed in the concrete upper of the water level is due to the degradation produced by an acid attack generated by the bacterial digestion processes of the biological treatment of wastewater. The suitable tests for diagnosis and the validity of regulatory requirements for the design of durability against acid attack, are also evaluated. PALABRAS CLAVE: estación depuradora, ataque ácido, reparación, ensayos, durabilidad, hormigón