Water- and frost-resistance of crushed stone mastic asphalt concrete prepared on sevilen-modified bitumen

Introduction . Currently, increasing the durability of road asphalt concrete pavements is one urgent issues, solution which provides a significant economic effect achieved by turnaround time, as well overall service life highways. Asphalt with prolonged wetting due to weakening structural bonds can be destroyed crumbling mineral grains, leads increased wear pavement and formation potholes. Water penetrates into micro defects in structure concrete, leading decrease strength material. As result, corrosion resistance reduced. To improve quality binder pavement, particular from crushed stone-mastic (SMA), various modifying additives, including polymer ones, are used. In this regard, promising direction use polymers containing active groups, able provide an increase adhesion materials, those acid rocks, and, consequently, water resistance. One these ethylene vinyl acetate copolymer (EVAC). Materials methods order study sevilen on frost mixtures, mixtures were prepared based bitumen modified БНД 70/100 made Moscow Oil Refinery Plant was used initial preparation binders. Tests carried out for indicator content air voids accordance GOST R 58406.8.2019, coefficient 58401.18-2019 12801-98. Results It has been established that samples significantly decreases concentration sevilene, will further contribute higher surface. shown 22% makes it possible presence polar molecules composition acetate, actively interacting components mixture. The improves samples. So, smallest tests 5% sevilene. found sevilene corresponds maximum basicity polymer, highest humidity temperature effects environment.