Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil

Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil

Abstract Fibre reinforcement is considered a good alternative for improving the geotechnical properties of soil. However, studies that investigate its behaviour, accounting for the unsaturated condition, and the hydraulic behaviour of soil mixtures with fibre, are limited. Therefore, the current study evaluates the impact of the inclusion of polypropylene fibres on the hydraulic behaviour of soil through geotechnical characterisation, scanning electron microscopy (SEM), macroporosity and microporosity tests, and filter paper tests. The soil-water characteristic curve (SWCC) of different mixtures of fibre-reinforced soil was adjusted by the models enshrined in the literature, using polypropylene fibres of length 6 mm, diameter 18 μm, and fibre contents 0.25% (SF025), 0.75% (SF075), 1.0% (SF100), and 1.25% (SF125) relative to the dry weight of the soil. The results indicated a transition from unimodal to bimodal shape in the SWCC for the polypropylene fibre-reinforcement, suggesting that their inclusion altered the soil structure. The same bimodal behaviour of SWCC was observed in all reinforced samples that produced similar values of air-entry suction and residual volumetric water content, but with increased water retention for the same level of suction for higher fibre content. The results of the tension table test indicated an increase in the volume of macropores with an increase in fibre content and a decrease in micropore volumes. These results agree with the compaction tests, which showed a decrease in the dry maximum density with an increased fibre content, whereas the optimum water content increased.

Saved in:
Bibliographic Details
Main Authors: Castro,Cíntia Lopes de, Soares,Anderson Borghetti, Aguiar,Marcos Fábio Porto de
Format: Digital revista
Language:English
Published: Associação Brasileira de Mecânica dos Solos 2022
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2675-54752022000300403
Tags: Add Tag
No Tags, Be the first to tag this record!
id oai:scielo:S2675-54752022000300403
record_format ojs
spelling oai:scielo:S2675-547520220003004032022-07-14Soil-water characteristic curve of polypropylene fibre-reinforced sandy soilCastro,Cíntia Lopes deSoares,Anderson BorghettiAguiar,Marcos Fábio Porto de Fibre reinforcement Soil-water characteristic curve Filter paper technique Matric suction Abstract Fibre reinforcement is considered a good alternative for improving the geotechnical properties of soil. However, studies that investigate its behaviour, accounting for the unsaturated condition, and the hydraulic behaviour of soil mixtures with fibre, are limited. Therefore, the current study evaluates the impact of the inclusion of polypropylene fibres on the hydraulic behaviour of soil through geotechnical characterisation, scanning electron microscopy (SEM), macroporosity and microporosity tests, and filter paper tests. The soil-water characteristic curve (SWCC) of different mixtures of fibre-reinforced soil was adjusted by the models enshrined in the literature, using polypropylene fibres of length 6 mm, diameter 18 μm, and fibre contents 0.25% (SF025), 0.75% (SF075), 1.0% (SF100), and 1.25% (SF125) relative to the dry weight of the soil. The results indicated a transition from unimodal to bimodal shape in the SWCC for the polypropylene fibre-reinforcement, suggesting that their inclusion altered the soil structure. The same bimodal behaviour of SWCC was observed in all reinforced samples that produced similar values of air-entry suction and residual volumetric water content, but with increased water retention for the same level of suction for higher fibre content. The results of the tension table test indicated an increase in the volume of macropores with an increase in fibre content and a decrease in micropore volumes. These results agree with the compaction tests, which showed a decrease in the dry maximum density with an increased fibre content, whereas the optimum water content increased.info:eu-repo/semantics/openAccessAssociação Brasileira de Mecânica dos SolosSoils and Rocks v.45 n.3 20222022-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2675-54752022000300403en10.28927/sr.2022.070021
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Castro,Cíntia Lopes de
Soares,Anderson Borghetti
Aguiar,Marcos Fábio Porto de
spellingShingle Castro,Cíntia Lopes de
Soares,Anderson Borghetti
Aguiar,Marcos Fábio Porto de
Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
author_facet Castro,Cíntia Lopes de
Soares,Anderson Borghetti
Aguiar,Marcos Fábio Porto de
author_sort Castro,Cíntia Lopes de
title Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
title_short Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
title_full Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
title_fullStr Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
title_full_unstemmed Soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
title_sort soil-water characteristic curve of polypropylene fibre-reinforced sandy soil
description Abstract Fibre reinforcement is considered a good alternative for improving the geotechnical properties of soil. However, studies that investigate its behaviour, accounting for the unsaturated condition, and the hydraulic behaviour of soil mixtures with fibre, are limited. Therefore, the current study evaluates the impact of the inclusion of polypropylene fibres on the hydraulic behaviour of soil through geotechnical characterisation, scanning electron microscopy (SEM), macroporosity and microporosity tests, and filter paper tests. The soil-water characteristic curve (SWCC) of different mixtures of fibre-reinforced soil was adjusted by the models enshrined in the literature, using polypropylene fibres of length 6 mm, diameter 18 μm, and fibre contents 0.25% (SF025), 0.75% (SF075), 1.0% (SF100), and 1.25% (SF125) relative to the dry weight of the soil. The results indicated a transition from unimodal to bimodal shape in the SWCC for the polypropylene fibre-reinforcement, suggesting that their inclusion altered the soil structure. The same bimodal behaviour of SWCC was observed in all reinforced samples that produced similar values of air-entry suction and residual volumetric water content, but with increased water retention for the same level of suction for higher fibre content. The results of the tension table test indicated an increase in the volume of macropores with an increase in fibre content and a decrease in micropore volumes. These results agree with the compaction tests, which showed a decrease in the dry maximum density with an increased fibre content, whereas the optimum water content increased.
publisher Associação Brasileira de Mecânica dos Solos
publishDate 2022
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2675-54752022000300403
work_keys_str_mv AT castrocintialopesde soilwatercharacteristiccurveofpolypropylenefibrereinforcedsandysoil
AT soaresandersonborghetti soilwatercharacteristiccurveofpolypropylenefibrereinforcedsandysoil
AT aguiarmarcosfabioportode soilwatercharacteristiccurveofpolypropylenefibrereinforcedsandysoil
_version_ 1756442208887635968

Similar Items