The Stabilizing Additive from Natural Zeolite for Stone Mastic Asphalt

Abstract

The article describes the possibility to use natural zeolites as a stabilizing additive for Stone mastic asphalt. Stone mastic asphalt is highly resistant to damage caused by traffic and natural climatic conditions. It is possible to use natural zeolites economically exploited in the Republic of Sakha (Yakutia) as a stabilizing additive, a characteristic feature of which is the presence of voids and channels threading through the entire frame in a dense lattice. In this study, comparative tests of crushed stone-mastic asphalt with various stabilizing additives. As a control group of samples, the stabilizing additive "Stilobit" was used. As a result, data were obtained that natural zeolites are suitable for use as stabilizing additives in the composition of crushed stone-mastic asphalt concrete. In this study, according to the test results, it can be concluded that the natural zeolites are suitable for the use as a stabilizing additive in the composition of stone mastic asphalt. Preliminary mechanical activation of zeolites allows improving the "stone material - binder" interaction at the phase boundary, which is confirmed by improved water resistance parameters of SMA.