Tratamientos superficiales con potencial aplicación en construcciones de hormigón de importancia patrimonial
; Rastelli, Silvia Elena
; Lopez, Anahi
; Rosato, Vilma Gabriela
; Gómez de Saravia, Gabriela Florencia 
Otros responsables
Fecha
2020
Editorial
Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica
Revista
Título del libro
Nombre del evento
IX Congreso Internacional y 23a Reunión Técnica de la Asociación Argentina de Tecnología del Hormigón, "A 73 años de la Primera Conferencia del Hormigón en Argentina
Fecha del evento
2020-11-04
Institución organizadora
Asociación Argentina de Tecnología del Hormigón
ISSN
eISSN
2250-5989
ISBN
Idioma
Español
Tipo del evento
Congreso
Clasificación temática
Palabras clave
Resumen
Las microalgas pueden formar biopelículas sobre diferente tipo de construcciones, afectándolas estéticamente al provocar su deterioro superficial. En este trabajo se evaluó el efecto alguicida de diferentes tratamientos superficiales para prevenir la formación de biopelículas fototróficas. Las superficies fueron tratadas utilizando solución de base acuosa sólo con tensioactivos (papeta) y adicionada con timol al 1 % y al 2 %. El efecto alguicida se evaluó sobre papel de filtro y probetas de hormigón. Las muestras se rociaron con una suspensión de ≈4.106 algas mL-1. Posteriormente, fueron incubadas bajo condiciones controladas de fotoperíodo y temperatura (16:8 h de luz:oscuridad, 25 ºC) durante 28 días. Todos los tratamientos empleados inhibieron el crecimiento algal tanto en los ensayos de papel de filtro como en las probetas de hormigón. Los tratamientos con timol fueron los más eficientes. Estos tratamientos superficiales serían potencialmente útiles para realizar limpiezas que impidan la formación de biopelículas fototróficas sobre edificaciones históricas.
Microalgae can grow and develop biofilms on different types of buildings, being able to aesthetically affect them and cause their surface deterioration. In this work, the algicidal effect of different surface treatments was evaluated to prevent the formation of phototrophic biofilms on concrete surfaces. The surfaces were treated using aqueous-based solution only with surfactants (paper) and added with 1% and 2% thymol. The algicidal effect was evaluated on filter paper and concrete specimens, leaving in both cases a set of control samples, without treatment. The inoculum used in the tests was a community of algae, isolated from concrete constructions. The samples were sprayed with a community solution at a concentration of ≈4,106 algae mL-1. Subsequently, they were incubated under controlled photoperiod and temperature conditions (16:8 h light: dark, 25ºC) for 28 days, recording partial results of the observations weekly. All the treatments used inhibited algal growth both in filter paper tests and in concrete specimens. These surface treatments would be potentially useful for cleaning that prevents the formation of phototrophic biofilms on historical buildings.
Microalgae can grow and develop biofilms on different types of buildings, being able to aesthetically affect them and cause their surface deterioration. In this work, the algicidal effect of different surface treatments was evaluated to prevent the formation of phototrophic biofilms on concrete surfaces. The surfaces were treated using aqueous-based solution only with surfactants (paper) and added with 1% and 2% thymol. The algicidal effect was evaluated on filter paper and concrete specimens, leaving in both cases a set of control samples, without treatment. The inoculum used in the tests was a community of algae, isolated from concrete constructions. The samples were sprayed with a community solution at a concentration of ≈4,106 algae mL-1. Subsequently, they were incubated under controlled photoperiod and temperature conditions (16:8 h light: dark, 25ºC) for 28 days, recording partial results of the observations weekly. All the treatments used inhibited algal growth both in filter paper tests and in concrete specimens. These surface treatments would be potentially useful for cleaning that prevents the formation of phototrophic biofilms on historical buildings.
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