Stabilisation of road foundations with cement is an effective and economical technology of increasing the bearing capacity of ground roads. Cement-ground composites are applied in the construction of public roads as basic foundations for surfaces with high bearing capacities. On forest and country roads a layer of the composite can function as an independent road surface. Cement may be used to bond the subsoil or the aggregates of anthropogenic origin (coal refuse, slag, debris, etc.) contained in the foundations. In this way an improvement in the bearing capacity of the surface is obtained and the harmful chemical compounds present in the stabilised aggregate are immobilised. Monitoring the chemical pollutants leached out of surfaces and road foundations requires that univocal procedures are worked out to obtaine eluates from the samples. The paper presents an original method developed by the authors to assess the degree of heavy metals immobilisation while taking into account the rheological condition of cement-ground road composites. The procedure comprises the preparation of eluates for chemical analyses from monolithic cement-ground samples and samples damaged by mechanical loads. The leaching medium is deionised water with the pH value decreased to 4.

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