Mechanical properties of a gravel soil injected with a polyurethane binder
Mechanical properties of a gravel soil injected with a polyurethane binder
Chemical grouts refer to the use of polyurethane foams and gels, acrylates and epoxies. The usage of polyurethane (PU) is expanding for joint sealing in concrete construction work as well as for controlling seepage in cracked rock and concrete. As part of an experimental investigation, tests were carried out in soils with a constant granulometry (with grain diameter 1-4mm) grouted with a polyurethane binder. A hydraulic permeability of k = 5.10-3m/s was specified as the target variable for the soils to be examined. Grouting tests were performed at a maximum pressure of 150kPa. After the grouting of the soils samples, three unconfined compressive strength and triaxial tests were performed in soils with relative densities of 1. Different binder quantities were injected into the soil. Results show that unconfined compressive strength values was about 6MPa. Triaxial tests performed on seven samples at relative densities between 0.89 and 0.94 showed peak deviatoric stress between 5.2 and 6.9MPa. PU binder is therefore suitable for permeation grouting in high permeable soils.
Goetz Tintelnot; Giovanni Spagnoli
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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