Influence of the Content and Grain Composition of Light Porous Fillers on Physical and Mechanical Properties of Bitumen-Mineral Compositions

It is shown that the perspective development direction and improvement of bitumen-mineral compositions on the basis of light porous mineral fillers is the differentiated selection of their grain structures. The influence of various fractions and content of porous filler on physical and mechanical properties of hot fine-grained asphalt concrete and the bitumen-mineral compositions has been analyzed comparatively. It is revealed that the most effective light porous filler for significant decrease of density and weight of the bitumen-mineral road paving is a mineral filler on the basis of expanded clay gravel. Structures of bitumen-mineral compositions with reduced density and weight, high strength rates, heat resistance, heat stability and good water resistance are developed. It is established that the greatest influence on physical and mechanical properties and structure of the offered bitumen-mineral compositions have fractions of expanded clay gravel with grains of 10–5 mm size.

Yu.G. BORISENKO, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
S.V. RUDAK, Engineer, О.А. BORISENKO, Candidate of Sciences (Engineering)

North-Caucasus Federal University (1, Pushkin Street, 355009, Stavropol, Russian Federation)

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