Effect of aggregate properties on asphalt mixtures stripping and creep behavior

Abo-Qudais, Saad; Al-Shweily, Haider

doi:10.1016/j.conbuildmat.2005.07.014

Cited by 115 publications

(38 citation statements)

References 3 publications

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“…These specimens were tested at 60 °C with a constant stress of 100 kPa for 3600 seconds and unloaded for the recovery of deformations for 5400 seconds. Also in some studies, in the last five years that was utilising the "standard" procedure depicted in Zurich 16 , the testing temperature had been chosen as 30 °C which was again a departure from this technique [40][41][42] .…”

Section: Static Creep Testing Of Dense Bituminous Mixtures Spanning Imentioning

confidence: 99%

Utilising neural networks and closed form solutions to determine static creep behaviour and optimal polypropylene amount in bituminous mixtures

2012

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The testing procedure in order to determine the precise mechanical testing results in Marshall design is very time consuming. Also, the physical properties of the asphalt samples are obtained by further calculations. Therefore if the researchers can obtain the stability and flow values of a standard mixture with the help of mechanical testing, the rest of the calculations will just be mathematical manipulations. Determination of mechanical testing parameters such as strain accumulation, creep stiffness, stability, flow and Marshall Quotient of dense bituminous mixtures by utilising artificial neural networks is important in the sense that, cumbersome testing procedures can be avoided with the help of the closed form solutions provided in this study. Marshall specimens, prepared by utilising polypropylene fibers, were tested by universal testing machine carrying out static creep tests to investigate the rutting potential of these mixtures. On the very well trained data basis, artificial neural network analyses were carried out to propose five separate models for mechanical testing properties. The explicit formulation of these five main mechanical testing properties by closed form solutions are presented for further use for researches.

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Section: Static Creep Testing Of Dense Bituminous Mixtures Spanning Imentioning

confidence: 99%

Utilising neural networks and closed form solutions to determine static creep behaviour and optimal polypropylene amount in bituminous mixtures

2012

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“…Also dynamic creep tests were applied to the same axial stress level and same temperature 49 . Also in some studies carried out in the last five years that was utilising the "standard" procedure depicted in Zurich in 1977, the testing temperature had been chosen as 30 °C which was again a departure from this technique [50][51][52] .…”

Section: Creep Testing and The Relevant Literature Spanning The Last mentioning

confidence: 99%

Rutting analysis of 100 mm diameter polypropylene modified asphalt specimens using gyratory and Marshall compactors

Tapkın

Keskín

2013

Mat. Res.

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Compaction technique used in Marshall design does not model the process of actual rolling procedures on site exactly. Carrying out laboratory compaction of dense bituminous mixtures with Superpave gyratory compactors is a more realistic way of simulating actual compaction. In this study, mechanical differences of reference and polypropylene modified asphalt mixtures were compared using Superpave gyratory and Marshall compaction methods by carrying out repeated creep tests utilising universal testing machine. In addition, there is no standard Superpave design procedure for 100 mm diameter samples till date. The other purpose of this study is to propose new standards for the compaction and testing procedures of these 100 mm specimens. Indeed, extensive studies have shown that the design gyration number should be 40 for reference and 33 for polypropylene modified specimens under medium traffic conditions for the similar and specific type of aggregate sources, bitumen, aggregate gradation, mix proportioning, modification technique and laboratory conditions. Moreover, it was shown that, the asphalt samples produced by Superpave gyratory compactor were much resistant to destructive rutting effects than the asphalt specimens prepared by Marshall design.

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“…However, the most accepted hypothesis is that the aggregate surface chemistry is the main responsible of the stripping process (7,11). Fromm (12) reported that stripping is high in mixes with acidic granites with hydroxylated SiO 4 .…”

Section: Introductionmentioning

confidence: 99%

“…The so-called stripping phenomenon, or asphaltaggregate bond failure, can be produced by a large number of factors, including composition, porosity and roughness of the aggregates, wettability between bitumen and aggregates, chemical composition at the interface (10), exposure aggregate history (e.g., freshly crushed versus days of exposure to environmental weathering after crushing), asphalt viscosity or traffic cyclic loading (11). However, the most accepted hypothesis is that the aggregate surface chemistry is the main responsible of the stripping process (7,11).…”

Section: Introductionmentioning

confidence: 99%

Utilización de técnicas petrográficas para evaluar los efectos inducidos del NaCl, condiciones climáticas extremas y el paso del tráfico en las superficies de las carreteras españolas

2017

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ABSTRACT:The asphalt surface layer is the most exposed to weather and traffic conditions on roads, especially those subjected to winter maintenance. Therefore, a deep knowledge of the mechanisms which can damage this layer is necessary to improve its design, construction and long-term use. With this purpose, two types of asphalt mixtures used on roads from NW Spain were subjected to durability tests (freezing-thaw and thermal-stress) with a saturated NaCl solution. After the durability tests, a wheel tracking test was performed on the samples, and the resultant material was analyzed by optical polarized light and fluorescence microscopy. This analysis showed that the binder-aggregate low adhesion was the main responsible of the asphalt mixture damage. This damage was concentrated in the aggregates because the binder acted as an impermeable wall. Consequently, the NaCl solution penetrated and degraded the aggregates quickly and strongly. RESUMEN: Utilización de técnicas petrográficas para evaluar los efectos inducidos del NaCl, condiciones climáti-cas extremas y el paso del tráfico en las superficies de las carreteras españolas.Las capas de rodadura son las más expuestas al clima y al efecto del tráfico, especialmente en carreteras sometidas a mantenimiento invernal. Por este motivo, es importante conocer mejor los mecanismos de deterioro de dichas capas a la hora de mejorar su diseño, construcción y uso a largo plazo. Con este fin, dos tipos de mezclas asfálticas utilizadas en el NO de España fueron expuestas a ensayos de durabilidad (heladicidad y choque térmico) con una solución saturada de NaCl. Después, se realizó el ensayo de pista y el material deteriorado y deformado resultante fue analizado mediante microscopia óptica de luz polarizada y de fluorescencia. Dicho análisis mostró que el principal responsable de la degradación de la mezcla fue la baja adhesión árido-betún. Esta degradación se concentró en el árido debido a que el ligante actuó como una pared impermeable. En consecuencia, la solución de NaCl pudo penetrar y degradar rápida e intensamente el árido.

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Effect of aggregate properties on asphalt mixtures stripping and creep behavior

Cited by 115 publications

References 3 publications

Utilising neural networks and closed form solutions to determine static creep behaviour and optimal polypropylene amount in bituminous mixtures

Utilising neural networks and closed form solutions to determine static creep behaviour and optimal polypropylene amount in bituminous mixtures

Rutting analysis of 100 mm diameter polypropylene modified asphalt specimens using gyratory and Marshall compactors

Utilización de técnicas petrográficas para evaluar los efectos inducidos del NaCl, condiciones climáticas extremas y el paso del tráfico en las superficies de las carreteras españolas

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