| abstract |
Mobile mixer to be used in train for cold recycling asphaltnconcrete roadways, of the type comprising bitumen as bindingnbase, where are provided:n means to heat said binding material in fluid form at 150/200°C,npreferably at about 170°C, and under pressure before thenspraying (U2) in said mixing means (P1); means to convey hot and fluid bitumen (B, P2) in a controllednway (P3) with additives (AD) through a static turbo-mixer withnopposite vanes (P4), to respective sprayers (P1) associated with:nmeans to inject water, in a controlled way (U2), to said bindingnmaterial immediately before the spraying, upstream of saidnsprayers (U3), under such a pressure to prevent the expansion ofnsaid added water, in order that at the exit from said sprayingnmeans (U3) a spraying of bituminous emulsion is formed withnexpansion by evaporation of the water particles forming anbituminous material foam that is sprayed into the aggregatingnmaterial in the mixing/blending, thus mixing and binding with itn(P1). |