Effect of the binder content in a soft stabilized soil unreinforced and reinforced subjected to cyclic loading – energy evaluation
Effect of the binder content in a soft stabilized soil unreinforced and reinforced subjected to cyclic loading – energy evaluation
When a soil is subjected to cyclic loading, there are changes in the behaviour of the material that need to be characterized for a safe design. To this end, a series of unconfined compressive strength (UCS) tests were performed, with and without the application of cyclic loading, to study the effect of the binder content on the behaviour of a soft soil stabilized under cyclic loading, unreinforced and reinforced with polypropylene fibres. The results were analysed in terms of the evolution of plastic deformation, and of the elastic and plastic energy. It was observed that plastic energy prevails in the first cycles but decreases with the increase in the number of loading cycles, and the increase of the binder content is associated with the decrease of the initial plastic energy. The accumulated plastic deformation occurring during the cyclic loading induces a strain hardening effect that is responsible for the increase in the undrained resilient modulus. The addition of polypropylene fibres prevents the development of some cementitious bonds and promotes an increase in the plastic deformation energy, leading to an increase in the accumulated plastic strains and to a reduction in the undrained resilient modulus during the cyclic loading stage.
L. A. Martins; A. A. S. Correia; Paulo Jose Venda Oliveira; Luis J. L. Lemos
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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