Evaluation of aging processes of petroleum asphalt cements by solid state electrochemical monitoring

6533b833fe1ef96bd129b5d4

RESEARCH PRODUCT

Evaluation of aging processes of petroleum asphalt cements by solid state electrochemical monitoring

Géssica Domingos Da Silveira Leandro Machado De Carvalho Antonio Doménech-carbó Noemí Montoya

subject

Materials science General Chemical Engineering Sulfoxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Asphalt Electrochemistry Thiophene Polythiophene Thin film 0210 nano-technology Voltammetry Organosulfur compounds

description

Abstract The changes in the chemistry of organosulfur compounds from asphalt cements during aging are studied using solid state voltammetry of immobilized microparticles. Five Brazilian asphalt cements were evaluated after three forced aging processes: Rolling Thin Film Oven Test (RTFOT), Pressure Aging Vessel (PAV) and SUNTEST. It was possible to identify the presence of thiophenes, sulfides and sulfoxides in the different samples and the reactional changes during the aging processes were proposed. Voltammetric data, supported by ATR-FTIR spectroscopy, indicate that aging asphalts involve the increase of the proportion of sulfoxide and thiophene components and that polythiophene compounds were formed mainly in the SUNTEST aging due the involvement of radical species.

year	journal	country	edition	language
2018-04-01	Electrochimica Acta

https://doi.org/10.1016/j.electacta.2018.02.039

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