Influence of Fine-Disperse Screenings of Expanded Clay Crushing on Structure and Properties of Stone Mastic Asphalt Concrete

The influence of various highly porous mineral fillers on the properties and sorption activity of asphaltic binders and asphalt concretes based on them was analyzed. The application of fine-disperse screenings of expanded clay crushing as a stabilizing additive to the stone mastic asphalt (SMA) makes it possible to significantly reduce the rate of bitumen draining into the stone mastic asphalt concrete mix (SMAM), improve mechanical properties, heat resistance, and water resistance of the material. As a result, laboratory studies have established the improvement of crack resistance, frost resistance and shear stability of SMA modified with high-disperse screenings of expanded clay crushing due to the change in the asphalt binder structure and reduction of temperature stresses in the coating material. It is shown that the inclusion of powder porous material additives into the composition of SMAM improves the structural and mechanical properties of SMA. It was established experimentally that the modification of stone mastic asphalt concretes with finely dispersed porous materials can significantly improve the durability of SMA.

Yu.G. BORISENKO, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
O.A. BORISENKO, Candidate of Sciences (Engineering)
S.O. KAZARYAN, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
M.Ch. IONOV, Candidate of Sciences (Economics)

North-Caucasus Federal University (2, Kulakova Street, 355028, Stavropol, Russian Federation)

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