Effect of cyclic loading stress level and amplitude on the behaviour of a soft soil chemically stabilized unreinforced and fibre-reinforced

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Publication Title
Effect of cyclic loading stress level and amplitude on the behaviour of a soft soil chemically stabilized unreinforced and fibre-reinforced

Abstract
This works aims to characterise the effect ofin cyclic loading stress level and amplitude, on the behaviour of a soft soil chemically stabilized and reinforced with polypropylene fibres by comparing the results of unconfined compressive strength (UCS) and split tensile strength (STS) tests (STS) carried out before and after a cyclic loading stage. The laboratory work is based on the following tests: i) monotonic UCS and STS test (reference values); (ii) cyclic UCS and STS tests and (iii) monotonic UCS and STS tests performed after the cyclic loading stage (UCSpc and STSpc). From the results it is observed that the permanent deformations show a sharp increase at the beginning of the cyclic stage followed by a decrease in the strain rate for unreinforced and fibre-reinforced samples. In terms of cyclic loading stress level and amplitude, Ffor levels of stress and amplitudes of up to 50% of the maximum strength/load, the samples exhibit lower permanent strains but become stronger and stiffer than the reference values (monotonic tests). These observations are valid for both stabilised materials (unreinforced and fibre-reinforced).
Authors
Jorge Villarroel-Ortega; A. A. S. Correia; Paulo Jose Venda Oliveira; L. Leal Lemos

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

E - Environment, water and energy

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