ABSTRACT
Recycl ing o f use d buildin g material s wil l b e mor e importan t i n th e
the future . On e materia l grou p consist s i n concret e bas e plates .
In connect io n wit h th e recyclin g o f bas e plate s ther e ar e som e specia l
problems t o solve . W e hav e t o distinguis h betwee n suc h plate s whic h
are contaminate d an d suc h withou t pollution . Th e contaminatio n re -
sults from train s especiall y i n th e area s o f switc h an d o n th e othe r
hand from loadin g an d fillin g places .
