Resistance under Marshall monotonic load for asphalt concrete mixtures
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Yung Vargas, Yee Wan | 2022-01-06
The dense hot MDC-19 type asphalt mixes are considered, by the “Instituto Nacional
de Vías” in Colombia, as continuous grading asphalt mixes (asphalt concrete). These constitute
most of the surface course, in the structures of in-service pavements, being the object of study
and research in different projects to ensure their durability. In the present investigation, unlike
other investigations, the mechanical behavior under Marshall monotonic load was studied in the
laboratory between MDC-19 dense type asphalt mixtures, comparing plant-produced and
laboratory-produced asphalt mixtures. To carry out this process, samples of uncompacted asphalt
mixtures were taken, produced in four fixed plants, with which Marshall-type briquettes were
compacted. Likewise, samples of mineral aggregates and asphalt cement were obtained from the
same plants, which constitute the mixtures raw material produced there. With these materials,
briquettes with the same characteristics were mixed and compacted. Subsequently, the resistance
under Marshall monotonic load was determined on the briquettes manufactured in plant and
laboratory. The optimal asphalt cement content was compared between plant and laboratoryproduced mixtures. An increase in Marshall Stability was found in the briquettes made with
plant-produced mixtures, while these required a greater amount of asphalt cement for their
production.
LEER
