DefinePK

Abstract

The problem of the development of new multi-component binders is relevant in the present time. Ground rocks and by-products of the industry can be used in multi-component binders for various applications. Mineral additive based on shungite rocks is used for protective concrete against ionizing radiation. Shungite rocks differ in genesis, mineral composition as well as carbon and silica content. The efficacy of aggregates based on shungite rocks and shungisite in cement concrete as protective material against ionising radiation is known. However, influence of shungisite microfillers on the properties of cement compositions with polycarboxylate super plasticizers was not investigated. Morphology, element analysis of shungisite particles as well as compatibility of shungisite microfillers with polycarboxylate superplasticizer in cement compositions have studied in the paper. Shungisite microfillers were obtained under heating shungite rock at the temperature of 1000°C and its subsequent grinding. It has stated that the water demand of cement paste with normal consistency had increased with the increase of the fineness of the shungisite microfiller. The plasticizing effect of polycarboxylate-based superplasticizer has depended on the composition of shungisite. The data of determining the electrokinetic properties of the shungisite micro-particles have confirmed this. Results can contribute to the rational use of shungisite microfillers in cement composite to create effective protective materials with shielding properties against electromagnetic radiation or cement composites with electro-conductive properties.