INFLUENCE OF SILICONE CARBIDE ADDITIONS ON THE MECHANICAL PROPERTIES OF CONCRETE

Abstract

In this work, the results of the chemical modification of concrete based on Portland cement by a silicon carbide F140 addition of (5, 10 and 15) w/% to the mixture as a filler are summarized. The main goal of this study was to characterize the influence and w/% of content addition of new commercial fillers on the concrete’s mechanical strength. A three-equation method for the reference recipe calculation is widely used. The process of concrete production including the white Portland cement (42.5 MPa), basalt aggregate, water and deflocculant based on polycarboxylate according to the calculated recipe. To characterize the basic properties of the studied concrete, SEM and LM observations, the chemical composition, and a slump cone test were investigated. The thermal properties were also investigated using a thermal analyser. The samples of concrete were characterized by compressive strength and bending tests after 28 d of curing. The results were compared with reference samples of concrete without the chemical addition of the silicon carbide. This study proved that all the chosen modifications had an increased effect on the final mechanical strength of the researched concrete samples. The thermal conductivity was also increasing. These kinds of concretes are very promising for applications in civil engineering and new building technologies of the future.