Abstract
With an ever-decreasing source of aggregate, this study reports laboratory tests on geologically young material, some of which is unconsolidated, in order to determine whether they can be used as aggregates. Los Angeles abrasion and aggregate impact values were compared and correlations made between these parameters and the petrographic composition of the material, as well as some other common properties (particle shape, water absorption). The drift deposits tested consisted mainly of limestone gravels although clasts of sandstone with some deleterious chert and fine material were also present. Whilst the laboratory test results did not always conform to the requirements of the common Standards for aggregates, it was considered that, with appropriate processing, many of the materials could be used.
Résumé
L’importance d’une sélection rigoureuse des types de roches utilisées en revêtement de façade est soulignée. Une méthode simple et opérationnelle de définition de l’aptitude de certains types de roche à être utilisées comme plaques de revêtement de façade est présentée, avec vérification des performances du dispositif. Les résultats obtenus démontrent l’applicabilité de la méthode. Un logiciel permet de simuler correctement le comportement des plaques de revêtement dans les conditions de l’étude, avec détermination des dimensions adéquates de ces plaques de revêtement et vérification des caractéristiques de résistance de l’accrochage au support.
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Acknowledgments
This work was carried out in the frame of “Karatheodoris” research programme provided by the Research Committee of the University of Patras. The authors wish to express their sincere appreciation for the generous support.
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Koukis, G., Sabatakakis, N. & Spyropoulos, A. Resistance variation of low-quality aggregates. Bull Eng Geol Environ 66, 457–466 (2007). https://doi.org/10.1007/s10064-007-0098-x
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DOI: https://doi.org/10.1007/s10064-007-0098-x