Evaluation of the fracture resistance of asphalt concrete mixes including the effect of anisotropy

Ahmad, Mohiuddin; Bairgi, Biswajit K.; Khan, Zafrul; Tarefder, Rafiqul A.

doi:10.1007/s42947-019-0092-2

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…During testing, the sample geometry induces tension at the bottom of the sample resulting in crack propagation throughout the specimen. Details of this test for fracture properties analysis are presented in a past study ( 22 ). Fracture properties are analyzed from the SCB test results through analysis of basic load-deformation characteristics.…”

Section: Experimental Programmentioning

confidence: 99%

Evaluation of Full-Depth Reclamation and Cold Central-Plant Recycling Mixtures for Laboratory Compaction, Mechanistic Response, and Performance Properties

Bairgi

Tarefder

Hasan

et al. 2022

Transportation Research Record: Journal of the Transportation R

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Cold recycled mixtures (CRM) are gaining wider acceptability in the United States for rehabilitating existing pavement or new construction while reducing construction costs, environmental impacts, and construction time. However, the technology is still in development owing to inconsistency in design and limited research on mechanistic and engineering properties. To this end, this study evaluates full-depth reclamation (FDR) and cold central-plant recycling (CCPR) materials for evaluating (i) laboratory compaction protocols, (ii) mechanistic properties, and (iii) engineering performances. Two compaction methods—the Superpave gyratory compaction and the modified proctor—were developed for designing test specimens with adequate design properties. The mechanistic properties resilient modulus ( MR) and dynamic modulus (| E*|) were evaluated. Laboratory performance testing such as Texas overlay tester, semi-circular bending, and a modified Hamburg wheel tracking (HWT) were performed. This study also proposed a new parameter, loading limit ( Nmax), based on the modified HWT test configuration. The study found that the FDR exhibits less temperature dependency compared with the CCPR while subjecting to loading. Based on damage properties such as critical fracture energy, J-integral, crack propagation index, and Nmax, the CCPR exhibits more flexibility and damage resistance than FDR.

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Section: Experimental Programmentioning

confidence: 99%

Evaluation of Full-Depth Reclamation and Cold Central-Plant Recycling Mixtures for Laboratory Compaction, Mechanistic Response, and Performance Properties

Bairgi

Tarefder

Hasan

et al. 2022

Transportation Research Record: Journal of the Transportation R

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“…Fracture testing methods of hot mix asphalt include Single-Edge Notched Beam [8][9][10], Indirect Tensile fracture parameter [11][12], Disc-Shaped Compact Tension [13][14] and Semi-Circular Bending [15][16] tests. The Semi-Circular Bending (SCB) test is popular among asphalt researchers due to the ease of sample preparation from gyratory compacted cylinders or field cored samples [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fracture Properties of One and Two-Layer Porous Asphalt Subjected to Clogging

Golchin

Abdullah²,

Hamzah³

et al. 2022

ARASET

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An important requirement for asphalt mixtures is its fracture resistance that would influence the service life, maintenance and management of the pavement networks. Clogging may affect the fracture resistance of porous asphalts. In this paper, One-layer and Two-layer porous asphalt specimens were fabricated using conventional and modified binders. Specimens were conditioned under laboratory-simulative clogging process at different temperatures. The semi-circular bending test was used to characterize the fracture resistance of porous asphalts subjected to these clogging procedures. One-way ANOVA and general linear model were applied to analyse the test results statistically. The analyses indicated that clogging significantly affects fracture toughness, maximum load, and displacement of porous asphalts. In addition, mix type (One and Two-layer porous asphalt) and asphalt binder type have significant effects on the fracture resistance.

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“…You et al showed that the degree of cross-anisotropy in AC significantly affects the shear stress, which subsequently results in delamination between the AC layers ( 13 ). Furthermore, through the semi-circular bending test, Ahmad et al found that the fracture properties in AC are also dependent on the directional properties ( 14 ). These above-mentioned studies show that pavement performance can be better predicted by incorporating AC cross-anisotropy in pavement response.…”

mentioning

confidence: 99%

Field Characterization of Pavement Materials using Falling Weight Deflectometer and Sensor Data from an Instrumented Pavement Section

Khan

Tarefder

Hasan

2020

Transportation Research Record: Journal of the Transportation R

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This study deals with the backcalculation of the mechanical properties of pavement layers using not only the falling weight deflectometer (FWD) sensor data but also pavement response under that FWD load from the embedded sensors in an instrumentation section. To perform the backcalculation, a layered viscoelastic pavement model incorporating asphalt concrete (AC) cross-anisotropy is developed as the forward model. Field degree of cross-anisotropy in AC is determined at the maximum magnitude frequency obtained through continuous wavelet transform of the material response signal. The material response signal is obtained from the deconvolution between the loading signal and the signal registered at the embedded sensors. An inverse analysis methodology is also developed to calculate the gross vehicle weight (GVW) of any vehicle passing through the instrumentation section using only the backcalculated material properties and pavement responses. From the results, it is observed that inclusion of the AC cross-anisotropy reduces the error norm, and a good agreement is observed with the laboratory dynamic modulus in both horizontal and vertical directions. It is also observed that the maximum magnitude frequency of material response and degree of cross-anisotropy in AC both decrease with an increase in average AC temperature. Furthermore, using the backcalculated material properties and pavement responses, it is possible to determine the GVW with 95% accuracy.

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Evaluation of the fracture resistance of asphalt concrete mixes including the effect of anisotropy

Cited by 9 publications

References 11 publications

Evaluation of Full-Depth Reclamation and Cold Central-Plant Recycling Mixtures for Laboratory Compaction, Mechanistic Response, and Performance Properties

Evaluation of Full-Depth Reclamation and Cold Central-Plant Recycling Mixtures for Laboratory Compaction, Mechanistic Response, and Performance Properties

Evaluation of Fracture Properties of One and Two-Layer Porous Asphalt Subjected to Clogging

Field Characterization of Pavement Materials using Falling Weight Deflectometer and Sensor Data from an Instrumented Pavement Section

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