ABSTRACT
A road section, road 601 Sundsvägen outside Råneå, Northern Sweden, has been block-stabilised during May – June 1995. The stabilising agent used was Lohjamix, which contains at least 40-weight % of cement and the remainder is fly ash and blast furnace slag. The soil profile consisted of peat and sulfide soil. The soil was stabilised down to a depth of two meters. Results from geotechnical and environmental investigations are discussed in this paper. These investigations were performed during 1996 – 1998. Settlements, homogeneity of the stabilisation, in situ permeability and leachability of regulated elements were investigated. Stabilised soil samples from the investigated road section were not a homogenous mixture of soil and stabilising agent. During the mixing action, stabilised “nuggets” of the stabilising agent were generated, leaving the surrounding soil unstabilised. However, after two winter seasons, the quality of the stabilised road section satisfies the regulations given by the Swedish National Road Administration. The results indicate that block-stabilisation is an appropriate foundation method.
