|
Although the non-hydraulic slaked lime has been already discovered in ancient times, it finds use in repair applications nowadays. However, compared to other generally used binders, i.e., hydraulic lime and Portland cement, slaked lime is characteristic by a low hardness. To improve the overall performance of lime-based materials, the enhancement with graphene nanoplatelets as nanoadditive has been tested. In addition to control lime-based mortar, two mixtures enriched with 0.5 wt.% and 1.0 wt.% of graphene were prepared and tested. Hardened mortars were subjected to variety of tests to analyze their basic structural characteristics, mechanical performance, and water absorption. The particular tests were conducted for 28-days and 360-days samples. Additionally, heat transport and storage parameters of 360-days samples were measured with a hot-disk transient plane source technique (TPS) and the effect of mortars hygroscopicity, thus moisture content, was considered. Before the heat transport and storage testing, the samples were exposed to humid environment using a static desiccator method. The obtained data gave evidence of improvement of mechanical performance of mortars with used nanoadditive. On the other hand, low dosage of graphene nanoplatelets combined with their imperfect distribution had no substantial effect on water absorption and mortars hygroscopicity. Both tested thermal parameters were moderately affected by moisture presence.
|
