(57) 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).
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