The effect of lime and cellulose ether on selected properties of plastering mortar

摘要

The article presents the results of the investigation on the plastering mortars modified with lime and cellulose ether. Standard designations were performed and technological properties of plasters were determined. The performance of each plaster was rated, water retention ratio after 1.0, 30 and 60 minutes was determined and mechanical properties were described. An analysis of the effect of cellulose ether and lime on mortars' setting and hardening time was performed by ultrasonic method. Rheological properties of the pastes concerning yield stress and plastic viscosity were determined as well. Although water retention for all mortars is at the same level, other parameters are highly varied. The results presented in the paper clearly show the effect of the cellulose ether and lime admixture on the standard properties and technological characteristics of both the material in the plastic state and the final product. The proper selection of the particular mortar components may have a decisive influence on the properties of the final product, therefore a comprehensive examination of the material is so important. The rating of the technical parameters of mortars presented in the paper can be a valuable source of information for contractors and construction materials producers.