Estudo do comportamento do revestimento de pavimento utilizando mistura asfáltica morna com adição de borracha moída de pneu na SPA-248/055

Merighi, Cecilia Fortes; Suzuki, Carlos Yukio

doi:10.14295/transportes.v25i4.1055

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The ITS of the mixture with 14% oil to the asphalt binder experienced a 57% decrease of ITS compared to an asphalt mixture with neat binder. Merighi and Suzuki (2017) also observed that a WMA presented ITS lower than the reference hot asphalt mixture. According to these authors, the reductions in ITS are associated with an increase in the volume of voids in the WMA.…”

Section: Indirect Tensile Strength (Its)mentioning

confidence: 74%

Mechanical performance of asphalt mixture composed of asphalt binder modified with sunflower oil

Carvalho¹,

Barros²,

Lucena³

et al. 2022

TRANSPORTES

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Warm Mix Asphalt (WMA) refers to a variety of asphalt mixtures produced at lower temperatures than those conventionally used to produce hot mixture asphalt. These reductions in the production temperatures provide social, economic, and environmental gains. This study aimed to investigate the mechanical properties of asphalt mixtures composed of asphalt binders modified with sunflower oil at the addition contents of 1%, 2%, and 3%. Indirect tensile strength, resilient modulus, water sensitivity, dynamic modulus, rutting resistance, and fatigue life of the asphalt mixtures were evaluated. Results showed that the mechanical performance of asphalt mixtures composed of oil-modified asphalt binder decreased compared to that of the mixture with neat asphalt binder, even though all of them are suitable for application in surface courses according to the current technical requirements for asphalt concretes. However, asphalt mixtures with sunflower oil-modified binders presented enhances in adhesion, which indicates less susceptibility to moisture than their equivalent non-modified.

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Section: Indirect Tensile Strength (Its)mentioning

confidence: 74%

Mechanical performance of asphalt mixture composed of asphalt binder modified with sunflower oil

Carvalho¹,

Barros²,

Lucena³

et al. 2022

TRANSPORTES

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“…In these tanks, the main emissions are total organic carbons (TOCs), volatile organic compounds (VOCs), and polycyclic aromatic hydrocarbons (PAHs) (BERNUCCI et al, 2008;RUBIO et al, 2013;ZANETTI et al, 2016;MERIGHI and SUZUKI, 2017).…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions and energy consumption in asphalt plants

Santos¹,

Candido²,

Baulé³

et al. 2020

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Hot-mix asphalt used in pavement layers is produced by asphalt plants. In Brazil, despite the fact that these industrial units produce greenhouse gases, no control or measurement protocol has yet been established. This study aims to quantify emissions in different asphalt plants, in terms of carbon dioxide equivalent (CO2eq) and energy consumption. Asphalt plants were selected according to their type (batch or drum mix); production capacity (80 to 340 t/h), and whether mobile or fixed. In each plant, emissions were quantified and the energy consumption spent on drying and heating aggregates in the dryer drum was evaluated. The fuels used in the drier drum such as low pour point (LPP) oil, liquefied petroleum gas (LPG), and natural gas (NG) were evaluated and compared. The methodology consisted of surveying the thermal power of the dryer drum specified on the suppliers' catalog to calculate the volume of fuel required per ton of asphalt mixture produced. Based on the criterion of the lower calorific value of each fuel, the volume of fuel used was calculated according to the production of the asphalt plants. Through the GHC protocol tool, the quantification of emissions of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) gases was obtained, and then transformed into CO2eq emissions. As a result, lower energy consumption was observed in the mobile batch plants and higher consumption in the mobile counterflow drum mix plants. On average, 27.69% less energy per ton of processed aggregate was needed compared to the mobile counterflow plants. The use of natural gas in the dryer drum and for all plant models was the least emissive fuel. The results showed that for the mobile batch type with a capacity of 140 t/h, the emission was 13.62 kg of CO2eq / t. On the other hand, with the mobile counterflow type with a capacity of 200 t/h, 13.64 kg of CO2eq/t was produced. Finally, with the fixed counterflow type with a production capacity of 240 t/h and 300 t/h, emissions of 13.67 kg of CO2eq/t were obtained. Through this study, the mobile batch plant with a capacity of 140 t/h using natural gas showed the least environmental impact. When natural gas was used, this model obtained energy consumption and emissions 54.5% lower than the mobile counterflow model with a capacity of 50 t/h which showed the worst environmental performance.

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“…Existem diferentes tipos de aditivos para as misturas mornas no mercado, variando de produtos quıḿicos e orgânicos, asfalto espuma a ceras orgânicas (MERIGHI, 2017). No entanto, segundo Stimilli (2017) cada tipo de aditivo, empregado na fabricação das misturas WMA, atua com base em mecanismos particulares que fornecem benefıćios e desvantagens especı́ icas.…”

Section: Introductionunclassified

Avaliação das propriedades mecânicas de misturas asfálticas mornas modificadas com adição de óleos vegetais

Luz¹,

Martins²,

Costa³

et al. 2019

TRANSPORTES

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O uso de misturas asfálticas mornas pode vir a diminuir o consumo de energia e da poluição ambiental uma vez que estas misturas possuem temperaturas de compactação e usinagem inferiores às tradicionalmente utilizadas. Esta pesquisa estudou a adição de óleo de milho e de soja, novo e residual, para diminuir as temperaturas de usinagem e compactação das misturas asfálticas. Os corpos de provas foram produzidos em três temperaturas diferentes, a primeira foi à temperatura determinada pelas curvas logarítmicas viscosidade x temperatura e as outras foram 10°C e 20°C inferiores a primeira, respectivamente. Os ensaios mecânicos realizados foram Resistência à Tração, Lottman Modificado, Módulo de Resiliência, Flow Number e Módulo Dinâmico. Os resultados obtidos para os ligantes modificados, com ambos os óleos, foram inferiores aos obtidos para o ligante puro nas mesmas condições de temperatura. Portanto, o uso destes óleos como aditivos só se justifica pela logística reversa do óleo usado.

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Estudo do comportamento do revestimento de pavimento utilizando mistura asfáltica morna com adição de borracha moída de pneu na SPA-248/055

Cited by 3 publications

References 5 publications

Mechanical performance of asphalt mixture composed of asphalt binder modified with sunflower oil

Mechanical performance of asphalt mixture composed of asphalt binder modified with sunflower oil

Greenhouse gas emissions and energy consumption in asphalt plants

Avaliação das propriedades mecânicas de misturas asfálticas mornas modificadas com adição de óleos vegetais

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