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Erschienen in:
2012 | OriginalPaper | Buchkapitel
The Effect of Relative Humidity on the Performance of Lime-Pozzolan Mortars
verfasst von : Ioannis Karatasios, Maria Amenta, Maria Tziotziou, Vassilis Kilikoglou
Erschienen in: Historic Mortars
Verlag: Springer Netherlands
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Abstract
The development of strength in conservation mortars is of particular significance for new synthesized lime-based mixtures in terms of practical application, performance requirements and renovation cost of built monuments. In this work, the effect of relative humidity (RH%) on the strength characteristics of lime-natural pozzolan mortars was studied in three groups of specimens cured at different humidity conditions (45, 65 and 95 RH%). The development of compressive strength of the specimens was determined at preset time periods, from 7 days to 1 year. At the same time periods, the setting products and the microstructure of the mortars were monitored by thermal analysis (DTA/TG) and scanning electron microscopy (SEM/EDX). The results highlight the beneficial effect of elevated humidity on the strength of lime-pozzolan mortars and at the same time some issues related to the reliability and reproducibility of laboratory work in the field are addressed.