The paper presents a study to determine the applicability of blended cements with low Portland clinker content in construction mortars, including special mortars. The main additives used in the study, in the form of ground granulated blast furnace slag and silica fly ash, were characterised by a similar grain composition of less than 40 μm. They were introduced into mortars as a replacement for Portland cement in amounts of 50 and 70 % and their mixtures in amounts not exceeding 70 %. Tests were carried out to determine the influence of the proportion, as well as the SiO2 and CaO content of the individual main components, on the strength parameters of the designed cements. The results show that these cements can be used in self-compacting concrete technology and in sealing mixtures for geoengineering applications, which are designed to perform soil reinforcement and sealing. The proposed technology for the production of CEM V and CEM VI cements, in addition to the favourable changes in their properties, results in a significant reduction in the energy required to produce these cements.

In the formulations of adhesive mortars for tiles almost exclusively CEM I Portland cements are used. Practically no CEM II - CEM V cements with additives are used, although they are often produced with strength classes 32.5 R and some even 42.5R. Relationship between strengths of tile adhesives in which cement was partially replaced with fly ash and granulated blast furnace slag was studied. A fly ash was used in three different replacement levels from 5% to 25% by weight of either cement. The tensile adhesion were determined at 28 and 90 days after various conditioning conditions of the samples. The influence on the flexibility of mortars was also assessed. In small substitution levels, fly ash replacement increased the tensile adhesion strength. The results indicate that the optimal amount of fly ash and granulated blast furnace slag additive replacing a given amount of cement allows to obtain adhesive mortars for tiles with high functional parameters.

Arterial fenestration is a rare anatomical variant characterised by the presence of a congenital segmental duplication of an artery. In certain imaging modalities it may resemble arterial dissection, which, unlike arterial fenestration, is potentially lethal and requires treatment. The use of diagnostic methods that ensure a comprehensive visualisation of the vascular system, such as computed tomography angiography (CTA), may complete inconclusive results of exams performed with other modalities and enable the differential diagnosis of arterial fenestration and dissection.