Evaluation of resilient behavior of flexible pavement asphalt layers

Shafabakhsh, Gholamali; Tanakizadeh, Amin

doi:10.1617/s11527-015-0689-0

Cited by 6 publications

(7 citation statements)

References 19 publications

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“…The results agree with Khan et al (2015) [21], Shafabakhsh and Tanakizadeh, A. (2016) [22], Sarsam and Nihad (2019) [23].…”

Section: Effect Of Load Duration On Mrsupporting

confidence: 81%

“…At the high test temperature of 40 o C, the differences between Mr of the binder and surface layers were time-dependent and decreased with an increase in the loading duration. The test results revealed that the difference between resilient behavior of the binder and surface layers was more apparent at high temperatures and under fast traffic loadings, as also reported elsewhere [22]. Under different traffic loading the WMA less elasticity than that of HMA mixture as illustrated by Sarsam and Nihad (2019) [23].…”

Section: Introductionsupporting

confidence: 75%

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Model Development for the Prediction of the Resilient Modulus of Warm Mix Asphalt

Saleh

Albayati

2020

Civ Eng J

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Increasing material prices coupled with the emission of hazardous gases through the production and construction of Hot Mix Asphalt (HMA) has driven a strong movement toward the adoption of sustainable construction technology. Warm Mix Asphalt (WMA) is considered relatively a new technology, which enables the production and compaction of asphalt concrete mixtures at temperatures 15-40 °C lower than that of traditional hot mix asphalt. The Resilient modulus (Mr) which can be defined as the ratio of axial pulsating stress to the corresponding recoverable strain, is used to evaluate the relative quality of materials as well as to generate input for pavement design or pavement evaluation and analysis. Based on the aforementioned preface, it is possible to conclude that there is a real need to develop a predictive model for the resilient modulus of the pavement layer constructed using WMA. Within the experimental part of this study, 162 cylindrical specimens of WMA were prepared with dimensions of 101.6 mm in diameter and 63.5 mm in thickness. The specimens were subjected to the indirect tension test by pneumatic repeated loading system (PRLS) to characterize the resilient modulus. The test conditions (temperature and load duration) as well as mix parameters (asphalt content, filler content and type, and air voids) are considered as variables during the specimen’s preparation. Following experimental part, the statistical part of the study includes a model development to predict the Mr using Minitab vs 17 software. The coefficient of determination (R2) is 0.964 for the predicted model which is referred to a very good relation obtained. The Mr value for the WMA is highly affected by the temperature and moderately by the load duration, whereas the mix parameters have a lower influence on the Mr.

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“…The results agree with Khan et al (2015) [21], Shafabakhsh and Tanakizadeh, A. (2016) [22], Sarsam and Nihad (2019) [23].…”

Section: Effect Of Load Duration On Mrsupporting

confidence: 81%

Section: Introductionsupporting

confidence: 75%

Model Development for the Prediction of the Resilient Modulus of Warm Mix Asphalt

Saleh

Albayati

2020

Civ Eng J

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“…The traversing knob of the planimeter can then be used for the determination of the area of the WZ from the image of the core. The percentage of WZ for a core sample was determined by [2]: An optical microscope was used to view the detailed surface structure regarding aggregate particles weak zones in asphalt mixture specimens [47][48][49][50]. The effects of change in aggregate weak zones on resilient moduli need to be recognized.…”

Section: Methodsmentioning

confidence: 99%

“…Resilient modulus (M RT ) is the key parameter for the design of asphalt pavements. Asphalt mixture is a viscoelastic material which shows resilient behavior during cyclic loadings [2]. Several factors affect the resilient modulus (M RT ) of asphalt mixture, i.e., binder grade, temperature, loading pulse duration, loading pulse shape, moisture, indirect tensile strength, aggregate geometry, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Weak Zones on Resilience of Sustainable Surface Course Mixtures of Fresh-Reclaimed Asphalt Pavement

et al. 2022

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The use of reclaimed asphalt pavement (RAP) is necessary for sustainable and cost-effective road infrastructure construction. This research investigates the effect of the area of weak zones (WZ) on the resilient modulus (MRT) of mixtures of fresh asphalt with 20% RAP. Experimentation on fresh asphalt–RAP mixtures comprising Superpave (SP-A, SP-B) and Asphalt Institute (MS-2) gradations with 20/30, 40/50, 60/70 and 80/100 penetration grade binders was carried out. WZ were determined based on the analysis of magnified digital images of asphalt specimens obtained using optical microscopy. This study demonstrates that the 20/30 grade binder caused an increase in the MRT at 25 °C up to 1.8, 2.9 and 9.2 times for a 0.1 s load duration, and 2.4, 3.0 and 9.7 times for a 0.3 s load duration. In contrast, improvement at 40 °C was observed to be up to 1.9, 3.1 and 9.7 times for a 0.1 s load duration, and 1.9, 3.0 and 12.4 times for a 0.3 s load duration in comparison with 40/50, 60/70 and 80/100 grade binders, respectively. Experimental data were validated by factorial analysis. Power trendline equations were also developed between MRT and WZ to explain the effect of gravel particle orientation on the sustainable resilience of surface course mixtures.

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“…It is worth mentioning that the modulus of the AC layer under 15~35°C is usually used in pavement structure design in many countries (IRC, 2012;Corté & Goux, 1996;AASHTO, 1993;Ministry of Transport of China, 2006;Austroads, 2017). Consequently, a typical constant value of 2000 MPa was defined as the modulus of the AC layer under the specified temperature range based on the previous studies reflecting on results of laboratory tests (Austroads, 2017;Brown & Foo, 1991;Fakhri & Ghanizadeh, 2014;IRC, 2012;Lavasani et al, 2015;Ministry of Transport of China, 2006;Shafabakhsh & Tanakizadeh, 2016;Venudharan & Biligiri, 2015). At the same time, the modulus of the base layer was considered as a variable ranging from 500 MPa to 6000 MPa according to the findings presented in Section 1, that is to say, R m is distributed in a range from 0.25 to 3.…”

Section: Pavement Structure and Materials Propertiesmentioning

confidence: 99%

Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement

Yao

Jiang

et al. 2021

BJRBE

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In order to investigate the influence of modulus of the base layer on the strain distribution for asphalt pavement, the modulus ratio of the base layer and the AC layer (Rm) is introduced as a controlled variable when keeping modulus of the AC layer as a constant in this paper. Then, a three-layered pavement structure is selected as an analytical model, which consists of an AC layer with the constant modulus and a base layer with the variable modulus covering the subgrade. A three dimensional (3D) finite element model was established to estimate the strains along the horizontal and vertical direction in the AC layer under different Rm. The results show that Rm will change the distribution of the horizontal strains along the depth in the AC layer; the increase of Rm could reduce the maximum tensile strain in the AC layer, but its effect is limited; the maximum tensile strain in the AC layer does not necessarily occur at the bottom, but gradually rises to the middle with the increase of Rm. Rm could significantly decline the bottom strain in the AC layer, and there is a certain difference between the bottom and the maximum strain when Rm is greater than or equal to one, which will enlarge with increasing Rm. Rm could change the depth of the neutral axis in the AC layer, and the second neutral axis will appear at the bottom of the AC layer under a sufficiently large Rm. The average vertical compressive strain in the AC layer will significantly enlarge with the increase of Rm.

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Evaluation of resilient behavior of flexible pavement asphalt layers

Cited by 6 publications

References 19 publications

Model Development for the Prediction of the Resilient Modulus of Warm Mix Asphalt

Model Development for the Prediction of the Resilient Modulus of Warm Mix Asphalt

Effect of Weak Zones on Resilience of Sustainable Surface Course Mixtures of Fresh-Reclaimed Asphalt Pavement

Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement

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