Interface bond strength of geosynthetic-reinforced asphalt overlays and different asphalt emulsion rates

Authors

DOI:

https://doi.org/10.14295/transportes.v30i1.2632

Keywords:

Geosynthetic, Pavement, Asphalt tack coat, Interface shear

Abstract

The present study evaluated the behavior of geosynthetic-reinforced asphalt overlays using Leutner shear tests aiming on investigating different tack coat rates and the relationship of shear bond results with geosynthetics physical and mechanical properties. Therefore, samples were extracted from experimental sections combining 4 cationic rapid setting (CRS-2) emulsion rates and 3 reinforcement geocomposites (PET, PVA e Fiberglass). For all geosynthetics, results showed superior behavior of shear bond strength and interface shear stiffness as higher the applied emulsion rate. This increase was in the order of 129%, 73% and 146% for interface with PET, PVA and fiberglass reinforcement geocomposites, respectively. Asphalt retention capacity was not related to maximum shear bond strength, once higher tack coat rates were used. Geosynthetics physical properties presented influence over shear bond strength results, highlighting thickness, mass per unit area and geogrid mash sizes. Stiffer geosynthetics lead to lower bond strength results, while lead to higher interface shear stiffness. The influence of increase in tack coat rate was higher than the influence of geosynthetics physical and mechanical properties.

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Author Biographies

Matheus Pena da Silva e Silva, Federal University of São Carlos, São Paulo – Brazil

Possui graduação em Engenharia Civil pela Universidade Federal do Amazonas (2015), mestrado em Ciência e Engenharia de Materiais pela Universidade Federal do Amazonas (2017). Doutorando no Programa de Pós-Graduação em Engenharia Civil da Universidade Federal de São Carlos; É membro pesquisador do grupo de pesquisa em geotecnia da UFAM (GEOTEC) e membro do Grupo de Estudos em Geotecnia e Geossintéticos da UFSCar. Atualmente é professor Assistente da Universidade Federal do Amazonas, lotado no departamento de Engenharia Civil da Faculdade de Tecnologia (FT). Desenvolve pesquisa na área de Geotecnia, em especial na busca de novos materiais para pavimentação.

Natália de Souza Correia, Federal University of São Carlos, São Paulo – Brazil

Dra. Natalia de Souza Correia é Professora Adjunta do Departamento de Engenharia Civil e do Programa de Pós-graduação em Engenharia Civil da Universidade Federal de São Carlos (UFSCar). É Engenheira Civil pela UNESP de Ilha Solteira e Mestre em Engenharia Geotécnica pela Universidade de São Paulo (EESC/USP). Doutora em Engenharia Geotécnica pela Universidade de São Paulo (EESC/USP), com período sanduíche na Universidade do Texas em Austin (UTEXAS) e Pós-doutora em Geotecnia pela Universidade de São Paulo (EESC/USP). Tem experiência de ensino e consultoria nas áreas de Engenharia Geotécnica e Pavimentos, e pesquisa temas relacionados à melhoria de solo, modelagem numérica de problemas geotécnicos e desempenho dos geossintéticos em obras ambientais e de infraestrutura de pavimentos. Atualmente coordena projetos de pesquisa com órgãos de fomento como CNPq Universal e FAPESP. É autora de mais de 20 artigos em periódicos e 40 artigos completos em conferências. Atua na Diretoria da Associação Brasileira de Geossintéticos (IGS Brasil) desde 2015 e participa do Comitê Técnico Stabilization (TC-S) da International Geosynthetetics Society (IGS).

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Published

2022-04-30

How to Cite

Genaro Urquiza Júnior, G. ., Pena da Silva e Silva, M. ., & de Souza Correia, N. . (2022). Interface bond strength of geosynthetic-reinforced asphalt overlays and different asphalt emulsion rates. Transportes, 30(1), 2632. https://doi.org/10.14295/transportes.v30i1.2632

Issue

Vol. 30 No. 1 (2022)

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Articles

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Copyright (c) 2022 Gustavo Genaro Urquiza Júnior, Matheus Pena da Silva e Silva, Natália de Souza Correia

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