Mobile mixer to be used in train for cold recycling asphalt conrete roadways

摘要

Mobile mixer to be used in train for cold recycling asphalt concrete roadways, of the type comprising bitumen as binding base, where are provided:means to heat said binding material in fluid form at 150/200°C, preferably at about 170°C, and under pressure before the spraying (U2) in said mixing means (P1);means to convey hot and fluid bitumen (B, P2) in a controlled way (P3) with additives (AD) through a static turbo-mixer with opposite vanes (P4), to respective sprayers (P1) associated with: means to inject water, in a controlled way (U2), to said binding material immediately before the spraying, upstream of said sprayers (U3), under such a pressure to prevent the expansion of said added water, in order that at the exit from said spraying means (U3) a spraying of bituminous emulsion is formed with expansion by evaporation of the water particles forming a bituminous material foam that is sprayed into the aggregating material in the mixing/blending, thus mixing and binding with it (P1).