Analysis of the old mortars and proposals for the conservation of the archeological site of Logos-Edessa

摘要

The site of Logos covers an area of almost 20.000m~2 and contains city walls, roads, ruins of houses and warehouses. The building materials used were local stone and mortars. Nowadays, parts of the masonry suffer from demolition and the main reasons for decay seem to be frost, loose joints and bio-deterioration. In the present work the analysis of the building materials is presented. The stone is travertine, a porous nature material, presenting a compressive strength of 1.2MPa and a porosity up to 18%. As regards the mortars, two types were used for the construction: a hydraulic one containing lime and pozzolanic material and a second type based on clay. Based on the results derived from the analysis of the authentic mortars, new compatible ones were proposed emphasizing the usage of local, low-cost materials that are friendly to the environment.