A promising direction for improving the durability and transport and operational performance of road pavements is the use of modifiers, including those based on sulfur as a component of the asphalt concrete mixture. However, sulfur and its toxic gases are active substances that can enter into chemical interactions with fillers to form water-soluble calcium and magnesium sulfides CaS and MgS. This process leads to the destruction of the dispersed phase and a decrease in the water resistance of sulfur asphalt concrete. A promising direction that has received wide approbation in the manufacture of polymer composites is the finishing of the filler surface, which makes it possible to prevent the formation of water-soluble sulfides. The coupling agents form a shell impermeable to sulfur, which prevents its chemical interaction with the dispersed phase. The following components are offered as coupling agents: Polymethylsiloxane (PMS-100), SKDN-N rubber, silicic acid sol in a medium containing Fe(OH)3 nanoparticles, and iron (III) hydroxide sol.
Keywords: sulfur asphalt concrete, asphalt concrete, water resistance, strength, sulfur bitumen binders, nanoscale additive