Estudo de misturas asfálticas com ligante modificado pelo polímero EVA para pavimentos urbanos de Manaus - AM

Abstract

Resumo: A presente pesquisa buscou soluções com materiais alternativos visando à construção de pavimentos urbanos para Manaus (AM) com maior vida útil e condizente com as suas condições de serviço, em particular, o seu desempenho mecânico frente às temperaturas regionais. Estudou-se o ligante regional, CAP 50/70, misturado com 4% do polímero EVA, e como partícipe em compósitos asfálticos. A incorporação do mencionado polímero teve como objetivo melhorar suas propriedades reológicas e, por conseguinte, o comportamento mecânico desse compósito -concreto asfáltico, empregado como revestimento nas vias urbanas da Capital do Estado do Amazonas. Os ligantes (virgem e modificado) foram caracterizados conforme a especificação da ANP e a metodologia Superpave. As misturas asfálticas foram avaliadas pelo ensaio de fluência por compressão axial, com carregamento dinâmico à temperatura de 40 °C. O material asfáltico modificado com EVA (AMP EVA) demonstrou melhores propriedades reológicas ou equivalentes ao asfalto convencional (REMAN), ao longo de todos os ensaios de caracterização. As misturas alternativas compostas com o CAP modificado (SEVA) obtiveram desempenho mecânico superior ao de misturas com cimento asfáltico habitualmente comercializado na região (SMAN). Palavras-chave: Ligante modificado, polímero EVA, mistura asfáltica, ensaio de compressão axial dinâmico. Study of Asphalt Mixtures Containing a Binder Modified with EVA Polymer for Use in Urban Pavements in ManausAbstract: In this research we investigated alternative materials to build urban pavements in Manaus, seeking for pavements with longer lifetime for usage and suitable mechanical properties to withstand the local temperatures. The asphaltic mixtures contained a regional binder, namely CAP 50/70, mixed with 4% of EVA polymer. The incorporation of the latter polymer was aimed at improving the rheological properties of asphaltic concrete used in roads in the Amazonas' capital. The asphalt binders (original and modified) were characterized in accordance with the ANP (National Petroleum Agency) specification and the Superpave methodology. The asphalt mixtures had their mechanical properties studied using creep dynamics at 40 °C. The EVA modified binder (AMP EVA) yielded either better rheological properties or properties equivalent to the conventional asphalt (REMAN) throughout all the characterization experiments. The alternative mixtures composed by the binder modified with 4% EVA (SEVA) had superior mechanical performance compared to mixtures made up with the binder commonly commercialized in the region (SMAN). Keywords: Modified binder, EVA polymer, asphalt mixture, creep dynamics. IntroduçãoAs vias urbanas da capital do Estado do Amazonas mostram historicamente prematura deterioração. São diversas patologias associadas, destacando-se: afundamento plástico em trilha de roda ou deformação permanente -mormente, escorregamento no revestimento, depressões e trincas. Como principal causa, aludi-se o emprego de misturas betuminosas incompatíveis com as condições...

Application of polyester derived from biomass in petroleum asphalt cement

“…Considering the above findings, the application of BCP as an additive does not prevent the use of modified CAP for the preparation of asphalt, and corroborates the data previously reported in the literature [8,9] .…”

“…In this sense, the comparative analysis, in terms of the parameters studied with the asphalt produced using the BCP additive, has properties superior to previously published data with other additives [9,10] . The comparative analysis of the data shown in Table 3 indicates that the incorporation of the BCP additive to CAP is in accordance with the specifications of the DNER ME 043/95 standards [4] (Marshall method).…”

“…Rose and co-workers reported that modified asphalt containing 12% recycled rubber tyres had a softening point of 57.5 ºC and an elastic recovery of 79.8% [8] . D'Antona and co-workers reported that when 4% of a copolymer of ethylene and vinyl acetate (EVA) was added to conventional CAP, the softening point value was 62.3 °C [9] .…”

“…A study by D'Antona and co-workers reported on the incorporation of 4% of an ethylene and vinyl acetate copolymer (EVA) to conventional CAP, and reveals a Bitumen empty relation (%) value of 65.5% [9] . Thus, the modified asphalt with the BCP additive, in terms of this parameter, was on average 7% to 14% higher than the values found by D'Antona et al.…”

A Sustainability Analysis of Different Types of Asphalts

“…Studies related to the incorporation of EVA into the asphalt binder indicate increased viscosity and improvement in the performance of bituminous material, due in part to the solubilization capacity of EVA in saturated asphalt fractions. On the other hand, accelerated aging tests have shown that the presence of EVA reduces the oxidative decomposition process of asphalt [13]. Therefore, the purpose of the study is to make a brief analysis comparing the different types of asphalt, given their…”