Consolidation of clay-rich earthen building materials: A comparative study at the Alhambra fortress (Spain)
Metadatos
Mostrar el registro completo del ítemAutor
Elert, Kerstin; Jroundi, Fadwa; Benavides Reyes, Cristina; Correa Gómez, Manuel; Rodríguez Navarro, Carlos ManuelEditorial
Elsevier
Materia
Rammed earth Ethyl silicate Nanolime Nanosilica Alkaline activation Bacterial biomineralization
Fecha
2022-01-29Referencia bibliográfica
Kerstin Elert... [et al.]. Consolidation of clay-rich earthen building materials: A comparative study at the Alhambra fortress (Spain), Journal of Building Engineering, Volume 50, 2022, 104081, ISSN 2352-7102, [https://doi.org/10.1016/j.jobe.2022.104081]
Patrocinador
Universidad de Granada/CBUAResumen
Earth has been an important construction material throughout history. Being a relatively fragile
material, it can undergo extensive weathering depending on prevailing climate conditions,
consequently requiring constant maintenance and often consolidation. The latter is still one of the
most challenging tasks in the conservation field. Here we compare the effectiveness of a conventional
consolidant (ethyl silicate) with several more recently introduced consolidants (nanolime
and nanosilica) and consolidation methods (alkaline activation and bacterial
biomineralization). Improvements in weathering resistance, water drop absorption, contact angle,
and water vapor transmission, as well as mechanical strength (drilling resistance and compressive
strength) of laboratory-prepared rammed earth mock-ups and a rammed earth wall at the
Alhambra (Granada, Spain) were evaluated and related to treatment-induced compositional and
textural changes. A detailed analysis of advantages and shortcomings of each consolidant was
performed and modifications to current application protocols are proposed to optimize the efficacy
of conventional and novel consolidation treatments.