The Effect of Ceramic Application in Design of Ceramic-Based Plasters

Abstract

The main aim of this article is to find a progressive composition of plaster mixture consisting of lime hydrate, siliceous aggregates and a waste material admixture. Recycled finely ground brick powder appears to be a suitable material for lime or cement plasters. It exhibits good pozzolanic characteristics and actively participates in creation of bonds within the material structure. The brick dust primarily comes from the production of thermal insulating brick blocks. Therefore, recycling of this waste leads to improvement of ecological and economic aspects. In our previous studies, the effect of ceramic waste on properties of ceramic-based plasters has been studied and it was found out that the most promising solution is to partially replace fine aggregates and lime hydrate by ceramic powder as it can participate in pozzolanic reactions and it also plays a role of a filler. Ceramic powder significantly improved all studied material parameters presented in this article. Therefore, this article is an extension of previous studies and brings new insights to the topic, for example time horizon of the study. The first part of this article is focused on the analysis of the pozzolanic reaction. The effectivity of the ceramic waste on pozzolanic reactions was studied on pastes prepared only from lime hydrate with different amounts of ceramic powder replacement (from 10 to 70 mass% of ceramic waste). The pastes were stored in a climatic chamber under constant temperature and humidity conditions. The pozzolanic reactions were studied after 28 and 360 days of hydration using selected experimental measurements, namely characteristics of the pore system, mechanical properties and thermal analysis (DSC/TG). Based on the obtained results, the best paste was selected for the design of the plaster mixture enriched by siliceous sand. The same properties of the newly designed plaster were studied to confirm the effectivity of this mixture.