Today's construction industry is increasingly putting concepts such as sustainability, recycling, emission, and energy reduction at the forefront. This article follows the same path, looking at the design of new, recycled road subbase layers. These layers are almost 100 % composed of reclaimed asphalt, milled to the appropriate fraction. This reclaimed asphalt is either mixed with a suitable binder, heated to a low temperature or a combination of both effects occurs. The research described in this paper is partially related to the newly developed standard CSN 73 6147 Cold recycling of pavement structural layers [1]. The aim of the research is to economically and environmentally reuse even lower quality reclaimed asphalt, specifically in the subbase layer of pavements. Otherwise, this precious material is mainly used for the backfilling of roadsides.

Reclaimed asphalt; Subbase Layer; Cold Recycling; Warm Recycling; Asphalt Emulsion/Cement Bonding