where UCSwet is the unconfined comp

where UCSwet is the unconfined compression strength of the group immersed in water at 49°C (MPa) and UCSdry the unconfined compression strength of the group that was not submerged. According to Spanish specifications (PG-4), this ratio must be higher than 75% in CIR mixtures employed in road pavements with T1 and T2 traffic categories (Table 1). In roads with T3 and T4 traffic categories, this ratio must be higher than 70%. Furthermore, PG-4 defines the minimum UCS as 3.0 MPa for the dry group and 2.5 MPa for the wet group for T1 and T2 traffic categories. In the case of roads with traffic categories T3 and T4, the minimum UCS is 2.5 MPa for the dry group and 2.0 MPa for the wet group (Table 1).