Volume 19, No. 5, 2022
Geopolymers Based On Recycled Ground Glass And Cement For Sedimentary Soil Stabilization
Jair Arrieta , Carlos Millan and Fernando Jove
Abstract
The paper presents the stabilization of a soil with recycled-glass and Portland cement. For this, a sedimentary soil originating from the Guabirotuba Formation (Curitiba, Brazil) was used adding three amounts of cement in relation to the dry mass of the soil: 3, 6 and 9%. Additionally, 5%, 15% and 30% recycled-glass powder (GP) residue were the contents chosen to add to the soil-cement blend. The specimens were cured under 7, 28 and 90 days and submitted to unconfined compressive (qu), splitting tensile (qt) and durability against wet-drying cycles (M/S), and measuring the accumulated loss of mass (PMA). The results showed that the addition of the following factors increased the qt, qu and durability of soil-cement-GP mixes: cement content, GP content, molding dry unit weight and curing time. The strength is controlled by the porosity/cement ratio (?/Civ) for each curing time and GP content. Dosage and estimation equations for qt and qu were proposed using the ?/Civ index adjusted to an exponent of 0.21. Finally, considering the PMA results, 23 of the 27 proposed blends are suitable for the construction of pavement sub-bases.
Pages: 292-300
Keywords: Geopolymerization, Recycling, Glass Powder, Soil Stabilization, Durability.