LONG-TERM MONITORING AND COMPARATIVE ANALYSIS OF THE DURABILITY OF LIME-BASED RENDERS
Author(s)
ESKO SISTONEN, KALYANI KUMAR, PETRI MUTANEN
Abstract
The object of this article is to conduct analysis based on data from the probe monitoring of a rendered testing wall in Suomenlinna Sea Fortress, Helsinki, Finland. A special test wall was built in 2008 to make a comparison between different render types and recipes. The probe monitoring was started in July 2015 and for this article this data will be analysed. The changes of temperature, humidity and particularly the freeze–thaw cycles, which are typically the most crucial factor in the deterioration of renders in the Nordic climate, are included in the study. The monitoring data will be combined with results from the laboratory analysis and field test results to make a prediction on the future durability of each render. The renders will be compared with each other and the reference wall section to gain better understanding of the performance of the different types of render materials and the suitability of this kind of analysis on traditional rendering materials. Finding an accurate method to monitor traditional mortars like cement-based ones is potentially useful, which helps to understand the behaviour of the material and make recommendations for its repair.
Keywords
lime, hydraulic lime, mortar rendering, long-term monitoring, probe monitoring
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