Soil stabilization with plastic waste and sisal fibres

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Publication Title
Soil stabilization with plastic waste and sisal fibres

Abstract
In Portugal, road pavements as well as their foundation are mostly built with natural aggregates, usually crushed, with high economic and environmental impacts. However, the attempt to use excavation materials has become more frequent, whenever they meet the requirements for that use, either in the foundation or in the granular layers of road pavements. Nevertheless, it often happens that the materials found on the construction site do not meet the requirements to be reused, in many situations because they are fine clayey materials. One way to make it possible to reuse those materials is to improve their properties to fulfil the requirements of use. In this work, two clayey sand soils were characterized, in its natural state and after mixing it with plastic waste and sisal fibres, respectively. Mixtures with 1%, 2% and 3% of plastic waste and with 0.5%, 1.0% and 1.5% of sisal fibres with 15 mm length were characterized. Laboratory tests were performed to assess their ability to improve soil properties for embankment construction and pavement layers. The bearing capacity ratio was determined using California Bearing Ratio (CBR) test. An increase in the bearing capacity ratio was achieved with plastic waste stabilization. Reduction in the bearing capacity ratio was observed in the specimens stabilized with sisal fibres. Increase in the bearing capacity ratio was more effective for high penetration values. The dry unit weigh decreased with the increase in plastic waste / sisal fibre content.
Authors
Rosa Luzia; Dinis Correia Gardete; D. Monteiro; M. Sousa

Published In

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

Theme

E - Environment, water and energy

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