LOW-TEMPERATURE ASPHALT-CONCRETE MIXTURES OF TYPES A, B, C in I (FIRST) ROAD-CLIMATE ZONE (APPLICATION EXPERIENCE)
PURPOSE. With the growth of cargo and passenger shipping, necessity for the developed road network is growing. This problem is especially topical for the regions with a short duration of the construction season. In the article we show the technology of structure of layers from warm asphalt concrete mixes, as well as the received results of laboratory studies of mixtures and cutting samples from the arranged coatings. METHODS. We proved and confirmed reasonability of foaming oil viscous road bitumen by spraying a specified amount of water in a mixer of an asphalt mixing plant through nozzles of the dispenser-sprayer of water DRV-001. RESULTS AND THEIR DISCUSSIONS. We described the technology of production of low-temperature mixtures (warm asphalt-concrete mixtures) of types A, B and C with the use of viscous bitumen BND 90/130 and the method of its foaming. This technology has no analogues in the regions of Siberia and Far East: it allows to reduce energy costs in the production of low-temperature asphalt mixtures (warm asphalt-concrete mixtures), increase the transportation distance of warm asphalt mixtures and significantly prolong the construction season in the road-climate zone. CONCLUSIONS. Analyzing the data received in the design of experimental sites, we can concluded that the use of technology of warm asphalt mixtures allows not only to prolong the construction season, but also significantly reduce energy costs and the amount of pollutants in their production, which positively affects the environmental conditions of the region and working conditions in the production, packing and compaction of warm asphalt mixtures.