Use of the sem electroanalytical technique for the characterization of warm and semi-warm asphalt mixtures. MAPIA case study
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Abstract
With the analysis of the use of MAPIA natural asphalt (stone material impregnated with asphalt) in asphalt mixtures in warm (WMA) and semi-warm (HWMA) state, the aim is to study the possibility of prolonging the life cycle (LCA) in daily use (García, A., & Kikut Cruz, K., 2020). The SEM characterization technique (Scanning electronic Microscopy) was used, which yielded compounds such as Albite (0.06%), MgO (0.04%) (Magnesium Oxide), SiO2 (0.18%) (Silicon Dioxide) and a small percentage of Ti (0.10%) (Titanium), the main elements found in the sample are carbon (77.46%) and oxygen (14.26%). Briquettes were analyzed by the Marshall method at three different temperatures: HMA (150°C), WMA (120°C) and HWMA (100°C) with an asphalt content of 10%. A minimal difference was found between the WMA and HMA briquettes, in the WMA the peak load is 5.3 mm for the flow and 6.2 kN for the stability, while in the HMA the peak load is 4.5 mm for the flow and 6 kN for the stability, with these results, the most optimal temperature to carry out a future more detailed petrography study is the WMA based on the similar response to the Considering the use of MAPIA at a lower temperature would be beneficial for the environment by producing lower emissions and designing asphalt mixtures that include environmental sustainability as a design variable in the LCA, contributing to Sustainable Development Goal No. 9 (SDG). (Sustainable Development Goals 2020).
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