Evaluation of compactability and mechanical properties of bituminous mixes with warm additives

Sánchez-Alonso, Elsa; Vega-Zamanillo, Ángel; Castro‐Fresno, Daniel; DelRio-Prat, Maria

doi:10.1016/j.conbuildmat.2010.11.024

Cited by 112 publications

(54 citation statements)

References 8 publications

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“…As seen in the figure, TSR values of all WMA mixtures are below the failure criterion. This indicates that the addition of WMA additives increased the potential of moisture damage, as was also found by other similar studies [1][2][3]8]. The higher moisture damage potential of WMA mixtures might be due to lower mixing and compaction temperatures, which can cause incomplete drying of the aggregate.…”

Section: Analysis Of Scb Test Resultssupporting

confidence: 70%

“…Some studies [1][2][3]8] have demonstrated compromising effects of those WMA additives, while others [4][5][6][7] presented insignificant effects of the additives compared to HMA mixtures. This contradictory observation seems, at least to a certain extent, due to the lack of science in the conventional laboratory tests conducted, which are empirical and mostly do not represent fundamental material characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, many studies [1][2][3][4][5][6][7][8] have been conducted to evaluate the moisture susceptibility of WMA mixtures when they are produced through foaming techniques or by adding water-based asphalt emulsions. Some studies [1][2][3]8] have demonstrated compromising effects of those WMA additives, while others [4][5][6][7] presented insignificant effects of the additives compared to HMA mixtures.…”

Section: Introductionmentioning

confidence: 99%

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Moisture damage characterization of warm-mix asphalt mixtures based on laboratory-field evaluation

Kim

Zhang

Ban

2012

Construction and Building Materials

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This study presents laboratory evaluation integrated with field performance to examine two widely used warm-mix asphalt (WMA) approaches-foaming and emulsion technology. For a more realistic evaluation of the WMA approaches, trial pavement sections of the WMA mixtures and their counterpart hot-mix asphalt (HMA) mixtures were implemented in Antelope County, Nebraska. Fieldmixed loose mixtures collected at the time of paving were transported to the laboratories to conduct various experimental evaluations of the individual mixtures. Among the laboratory tests, three (two conventional and one newly attempted) were performed to characterize moisture damage potential which is the primary focus of this study. From the laboratory test results, WMA mixtures showed greater susceptibility to moisture conditioning than the HMA mixtures, and this trend was identical from multiple moisture damage parameters including the strength ratio and the critical fracture energy ratio. Early-stage field performance data collected for three years after placement presented satisfactory rutting-cracking performance from both the WMA and HMA sections, which generally agrees with laboratory evaluations. Although the field performance data indicated that both the WMA and HMA show similar good performance, careful observation of field performance over aperiod of years is necessary since moisture damage can be accelerated after rutting or cracking as a later-stage pavement distress.

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Section: Analysis Of Scb Test Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Moisture damage characterization of warm-mix asphalt mixtures based on laboratory-field evaluation

Kim

Zhang

Ban

2012

Construction and Building Materials

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“…Stiffness (stress/strain ratio) generally decreases as the manufacturing temperature decreases (29,30). The present results revealed a slight decrease of the modulus in the warm mix sub-ballast due to the decrease in manufacturing temperature that reduces Evaluation of bituminous sub-ballast manufactured at low temperatures as an alternative for the construction • 7 the aging of the mixtures, along with its stiffening, which is in accord with other studies (29).…”

Section: Results Of Characterizationsupporting

confidence: 81%

Evaluation of bituminous sub-ballast manufactured at low temperatures as an alternative for the construction of more sustainable railway structures

et al. 2017

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Hot bituminous mixtures are becoming widely used in modern railway tracks in the sub-ballast layer. The reason is that these materials allow for both an increase in bearing capacity and greater protection of the substructure respect the traditional granular sub-ballast. Despite these advantages, the fact that these materials are manufactured at a temperature of 160°C means that their application can lead to an important increase in construction costs, pollution and energy consumption. This paper aims to study the possibility of using WMA manufactured at lower temperatures, as bituminous sub-ballast, in order to save energy and reduce emissions throughout the production process, as well as diminish the global costs of this layer. To this end, this study focuses on a comparison of the mechanical behaviour of warm and hot bituminous mixtures as subballast under various loading conditions. The results indicate that WMA offers mechanical behaviour that is comparable to conventional HMA. RESUMEN:Evaluación del subbalasto bituminoso a partir de mezclas a baja temperatura, como alternativa para la construcción de infraestructuras ferroviarias más sostenibles. Las mezclas bituminosas en caliente en infraestructuras ferroviarias son una alternativa cada vez más extendida en vías de altas prestaciones, para mejorar la capacidad portante de la vía y el grado de protección del resto de la subestructura. Sin embargo, el sub-balasto bituminoso presenta una serie de limitaciones asociadas al posible incremento de costes de construcción y a problemas medioambientales derivados de la utilización de mezclas bituminosas en caliente fabricadas a 160°C. Este trabajo, tiene como objetivo estudiar la posibilidad de utilizar WMA fabricado a temperaturas inferiores, como sub-balasto bituminoso con el fin de ahorrar energía, reducir las emisiones y disminuir los costes constructivos de esta capa. Así, este estudio se centra en la comparación entre el comportamiento mecánico de mezclas bituminosas semicalientes y calientes como sub-balasto, bajo diferentes condiciones de carga. Los resultados muestran que el sub-balasto semicaliente presenta una respuesta mecánica comparable a las soluciones convencionales.

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“…As noted, certain additives used for the manufacturing of WMA mixtures may increase asphalt stiffness and rutting resistance after crystallization occurs (Sanchez et al 2011). In this sense, the additive must be selected so that when it stiffens, it does not lower fatigue cracking resistance at low or intermediate service temperatures.…”

Section: Similar To Sasobitmentioning

confidence: 99%

A Review of Warm Mix Asphalt Technology: Technical, Eco-nomical and Enviromental Aspects

Quintana¹,

Hernández-Noguera²,

Reyes³

2015

ing.inv.

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In general terms, warm mix asphalt (WMA) technology has great potential for successful use in road works construction projects. However, concerns remain regarding the durability and behavior of WMA mixtures in the long term, which need to be addressed. This review focuses on the technical, economic and environmental advantages and disadvantages. The review concludes that the main advantageof this technology, at the moment, concerns the environment. At the end of this work, the authors include certain recommendations for future works in order to continue strengthening the development of WMA technology.Keywords: Warm mix asphalt, WMA, manufacturing, design, additives. RESUMENEn términos generales, la tecnología de mezcla asfáltica tibias (WMA por sus siglas en inglés) presenta un gran potencial para ser usada con éxito en proyectos de obras de construcción de obras viales. Sin embargo, aún existe preocupación en temas concernientes a la durabilidad y al comportamiento a largo de plazo de esta tecnología. Con base en una revisión bibliográfica, el artículo presenta los aspectos más importantes concernientes a la tecnología WMA. Se reportan las ventajas y desventajas técnicas, económicas y ambientales de utilizar esta tecnología reciente. Al final del documento los autores exponen algunas recomendaciones como apoyo para continuar fortaleciendo el desarrollo de la tecnología WMA.

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Evaluation of compactability and mechanical properties of bituminous mixes with warm additives

Cited by 112 publications

References 8 publications

Moisture damage characterization of warm-mix asphalt mixtures based on laboratory-field evaluation

Moisture damage characterization of warm-mix asphalt mixtures based on laboratory-field evaluation

Evaluation of bituminous sub-ballast manufactured at low temperatures as an alternative for the construction of more sustainable railway structures

A Review of Warm Mix Asphalt Technology: Technical, Eco-nomical and Enviromental Aspects

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