Assessing the Tensile Properties of Asphalt Concrete

Sarsam, Saad Issa

doi:10.36937/ben.2022.4707

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…It was concluded that using a waste HDPE-modified binder is recommended for improving resistance to moisture-induced damage and adhesion. Sarsam [2] assessed the possibility of implementing extender oil (used oil) and scrap tire rubber to improve the physical qualities of the asphalt cement. It was revealed that a combination of 15% scrap rubber and 10% extender oil provided a suitable control on the softening point, ductility, penetration, and viscosity of the binder.…”

Section: Introductionmentioning

confidence: 99%

Assessing the rheological properties of bio modified asphalt cement

Sarsam

2024

J. Polym. Sci. Eng.

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The production of asphalt cement binder in Iraq is conducted through the distillation of crude oil. The byproduct of such distillation is the asphalt cement which does not practice any further processing further processing of the binder is considered vital to control its physical properties and chemical composition. The implementation of bio-modifiers before using such asphalt cement binder for paving work is a sound practice to enhance its sustainability and reserve the required rheological properties. In the present study, the asphalt cement binder was modified by implementation of extender oil (used diesel engine oil) and scrap tire rubber. The aim of this work is to improve and provide a sustainable and proper rheological quality of the binder for paving work. Various percentages of scrap tire rubber and extender oil have been tried to optimize the modifiers which can exhibit a suitable control on the required rheological properties of the asphalt binder such as the stiffness modulus, its temperature susceptibility in terms of penetration index and penetration viscosity number, and temperature of equivalent stiffness of the binder. The stiffness of asphalt cement binder was digested at hot, moderate, and cold environments. It was observed that the implementation of extender oil was able to reduce the penetration index (PI) by 36.3%, 54.5%, and 27.2% when 15%, 10%, and 5% of extender oil by weight of the mixture were added respectively to the control binder. The addition of scrap tire rubber to the binder-oil mixture was able to reduce the PI up to 10% of rubber content and exhibited further control of the temperature susceptibility of the binder. It can be revealed that the extender oil increases the negative values of penetration viscosity number (PVN) while the scrap tire rubber can improve the PVN of the binder. When high percentage of extender oil 15% is implemented, the stiffness of the binder declines by 50%, 90%, and 75% when the testing temperature change from 4 to 25, and 60 ℃ respectively. It was concluded that implication of 15% of scrap tire rubber and 15% of extender oil into the asphalt cement binder produced by Qayarah oil refinery is recommended to provide a sustainable binder for pavement, control its temperature susceptibility, and provide a binder with lower prone to pavement distresses.

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Section: Introductionmentioning

confidence: 99%

Assessing the rheological properties of bio modified asphalt cement

Sarsam

2024

J. Polym. Sci. Eng.

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“…Asphalt concrete mixture problems were assessed by Mandula and Olexa, (2017) progress in the fatigue life of asphalt concrete mixtures (Sarsam, 2021;Sarsam, 2022a, Sarsam, 2022b. The test results indicated that the phase angle is stabilized after one third of the test duration, while strong increase in the phase angle starts just before reaching the failure point.…”

Section: Introductionmentioning

confidence: 99%

Influence of constant strain levels on the viscoelastic properties of asphalt concrete

Sarsam¹

2023

IJE

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The flexural stresses applied by vehicular movement exhibit a great influence on the viscoelastic properties of asphalt concrete pavement. However, the fatigue life of the flexible pavement is related to the ability of the pavement to sustain the accumulated strain in the pavement structure through the design life of the pavement and it is considered as a good measure of its fatigue life.In the present work, asphalt concrete mixtures were prepared in the laboratory at optimum binder content and compacted in a slab mold using the roller compaction. Beam specimens of 62 mm width, 56 mm depth, and 400 mm length; were obtained from the prepared asphalt concrete slab samples.The beam specimens were tested for fatigue under repeated flexural stresses at 20℃ environments following the constant strain mode of loading. Constant strain modes of three levels have been tried as target amplitude, (750, 400, and 250) microstrain and the implemented loading frequency was 5 Hz throughout the test. The viscoelastic properties of asphalt concrete specimens have been monitored, analysed, and compared. It was noticed that the phase angle of asphalt concrete rises at failure by (33.3 and 50) % when the constant strain level rises from 250 to 400 and 750 respectively. However, the cumulative dissipated energy of asphalt concrete specimens increases at failure by (10 and 24) folds when the constant strain level declines from 750 to 400 and 250 respectively. On the other hand, the fatigue life of asphalt concrete specimens was (6.1 and 141.8) folds higher than that of 750 constant strain level for specimens practicing 400 and 250 constant strain levels respectively. It was revealed that higher constant strain level can exhibit sharper trend of decline in its initial stiffness as compared with the other microstrain levels.

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Contributory Factors related to the Tensile Strength of Hot Mix Asphalt Concrete

Oleiwi,

Albayati

2024

Eng. Technol. Appl. Sci. Res.

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Tensile strength is a critical property of Hot Mix Asphalt (HMA) pavements and is closely related to distresses such as fatigue cracking. This study aims to evaluate methods for assessing fatigue cracking in Asphalt Concrete (AC) mixes. In order to achieve optimum density at different binder contents, the mixes were compressed using a gyratory compactor. Tensile strength was assessed using the Indirect Tensile (IDT) and Semi-Circular Bend (SCB) tests. The results showed that the tensile strength measured by the SCB test was consistently higher than that measured by the IDT test at 25 °C. In addition, the SCB test showed a stronger correlation between increasing binder content and tensile strength. For binder contents ranging from 4.2% to 5.2%, the IDT test results increased from 541% to 678.7%, while the SCB test results increased from 630.3% to 743.7%. These results suggest that the SCB test provides a more accurate representation of the tensile strength of AC mixes than the IDT test.

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Assessing the Tensile Properties of Asphalt Concrete

Cited by 3 publications

References 21 publications

Assessing the rheological properties of bio modified asphalt cement

Assessing the rheological properties of bio modified asphalt cement

Influence of constant strain levels on the viscoelastic properties of asphalt concrete

Contributory Factors related to the Tensile Strength of Hot Mix Asphalt Concrete

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