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The Guabirotuba Formation is located over the sedimentary basin of the city of Curitiba (Brazil). The gray layer of the Formation extends from 1 to 50 m deep. Although it is the most characteristic layer of the Formation, there are no studies of stabilization of these soils for urban paving purposes in the city. Thus, this paper presents an experimental study of the stabilization of a gray silt soil with Portland cement (PC) using cure times (t) of 7, 14 and 28 days. Cement contents (C) of 3, 5, 7 and 9% in relation to soil dry mass were used. After cure times, simple compressive strength (qu) and durability tests were performed using wet/dry cycles (M/S). The results show an increase of qu with increasing cement content, increasing molding density and increasing curing time. In addition, the durability of the mixtures increased when more cement was added. It was found that the values ​​of qu are dependent on the semi-empirical porosity/cement ratio (η/Civ). Finally, it was found that 5% is the minimum cement content for soil use for paving purposes.

ESTABILIZAÇÃO DE UM SOLO DA CAMADA CINZA DA FORMAÇÃO GUABIROTUBA PARA FINS DE PAVIMENTAÇÃO URBANA EM CURITIBA, BRASIL