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Abstract(s)
Este trabalho visa avaliar as potencialidades das fibras de coco no melhoramento e estabilização de
solos problemáticos, de modo a garantir a sua aplicação nas camadas de bases e aterros em obras
rodoviárias em Moçambique. Para a análise, recorreu-se a modelação utilizando o software RS2 da
RocScience concebido para simulação de diferentes cenários que podem ocorrer na realidade em
obras de geoengenharias, sobretudo da engenharia geotécnica. Neste sentido, foi simulado o
comportamento de solo argiloso e arenoso. Em ambos os tipos de solos, foi simulado
comportamento do solo natural numa profundidade de 1.5 metros, com a camada superficial de
0.30 m melhorada com fibras de coco, e um aterro de 3 m com inclinações de taludes variáveis. No
caso do solo argiloso, a análise foi feita sob duas condições distintas, ou seja, em estado saturado
e não saturado. Em ambas condições do solo argiloso, foram utilizadas as proporções de 0.5%, 1%
, 1.5% e 2% de resíduos de fibras de coco com comprimentos variáveis, correspondentes ao peso
do solo natural. No caso do solo arenoso, foi utilizada uma mesma percentagem de 0.5% de fibras
de coco com 25 mm e 50 mm, tendo sido produzidos modelos do comportamento do solo arenoso
com 0.5% de fibras e 25 mm de comprimento e, 0.5% de fibras e 50 mm de comprimento. Da análise
feita, constatou-se que, os teores de 0.5% e 1% de fibras são os que apresentaram resultados
satisfatórios. Tendo por base esses efeitos propõe-se o reforço das obras de terra rodoviárias
Moçambicanas por meio da reutilização de fibras de coco produzidas pela agroindústria local. Tal
solução, além dos benefícios técnicos associados, irá incentivar a incorporação de um atual resíduo
no ciclo produtivo construindo assim para a dinamização da economia circular do país.
This work aims to evaluate the potential of coconut fibers for improving and stabilizing problematic soils to guarantee their application in base layers and embankments in road works in Mozambique. For the analysis, modelling was carried out using RocScience's RS2 software, designed to simulate different scenarios that may occur in geoengineering works, especially in geotechnical engineering. The behavior of clay and sandy soils was simulated. For both types of soil, the behavior of the natural soil was simulated at a depth of 1.5 meters, with a 0.30 m surface layer improved with coconut fibers, and a 3 m embankment with variable slope inclinations. In the case of the clay soil, the analysis was carried out under two different conditions, i.e., in a saturated and unsaturated state. In both conditions of the clay soil, proportions of 0.5%, 1%, 1.5% and 2% of coconut fiber waste were used in varying lengths, corresponding to the weight of the natural soil. In the case of sandy soil, the same percentage of 0.5% coconut fibers of 25 mm and 50 mm was used, and models of the behavior of sandy soil with 0.5% fibers and 25 mm in length and 0.5% fibers and 50 mm in size were produced. The analysis showed that the 0.5% and 1% fiber contents gave satisfactory results. Based on these effects, it is proposed to reinforce Mozambican road embankments by reusing coconut fibers produced by the local agro-industry. This solution, in addition to the associated technical benefits, will encourage incorporating an existing waste product into the production cycle, thus helping to boost the country's circular economy.
This work aims to evaluate the potential of coconut fibers for improving and stabilizing problematic soils to guarantee their application in base layers and embankments in road works in Mozambique. For the analysis, modelling was carried out using RocScience's RS2 software, designed to simulate different scenarios that may occur in geoengineering works, especially in geotechnical engineering. The behavior of clay and sandy soils was simulated. For both types of soil, the behavior of the natural soil was simulated at a depth of 1.5 meters, with a 0.30 m surface layer improved with coconut fibers, and a 3 m embankment with variable slope inclinations. In the case of the clay soil, the analysis was carried out under two different conditions, i.e., in a saturated and unsaturated state. In both conditions of the clay soil, proportions of 0.5%, 1%, 1.5% and 2% of coconut fiber waste were used in varying lengths, corresponding to the weight of the natural soil. In the case of sandy soil, the same percentage of 0.5% coconut fibers of 25 mm and 50 mm was used, and models of the behavior of sandy soil with 0.5% fibers and 25 mm in length and 0.5% fibers and 50 mm in size were produced. The analysis showed that the 0.5% and 1% fiber contents gave satisfactory results. Based on these effects, it is proposed to reinforce Mozambican road embankments by reusing coconut fibers produced by the local agro-industry. This solution, in addition to the associated technical benefits, will encourage incorporating an existing waste product into the production cycle, thus helping to boost the country's circular economy.
Description
Keywords
Reinforcement Coconut Fibers Roads Numerical Modeling