Characterisation of cracking resistance in modified hot mix asphalt under repeated loading using digital image analysis

Radeef, Hasanain Radhi; Hassan, Norhidayah Abdul; Mahmud, Mohd Zul Hanif; Abidin, Ahmad Razin Zainal; Ismail, Che Ros; Abbas, Hind Fadhil; Al-Saffar, Zaid Hazim

doi:10.1016/j.tafmec.2021.103130

Cited by 16 publications

(3 citation statements)

References 46 publications

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“…In essence, PE is expected to increase the rigidity of asphalt in hightemperature areas [10]. PE-modified asphalt (PEA) mixtures exhibit improved resistance to permanent deformation at high temperatures as well as thermal cracking under low temperatures [10][11][12][13][14][15]. PE is classified as a polyolefin in polymer and asphalt chemistry.…”

Section: Introductionmentioning

confidence: 99%

Microscopic Properties of Asphalt and Polyethylene at an Extraordinary High Dosage through Molecular Dynamics Simulation

Jin,

Li,

Chen

et al. 2024

Buildings

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Using waste plastics in asphalt mixtures could be an exploratory way to dispose of waste plastics. This study aims to investigate the microscopic properties between asphalt and polyethylene (PE) at an extraordinary dosage of 20 wt.%. Various types of PE with different degrees of polymerization (DP) and structural configurations were considered. Molecular dynamics simulations were used to calculate the mechanical parameters, free volume ratio (FVR), and Flory–Huggins parameter of the resulting PE-modified asphalt (PEA). Two types of PEA were made and characterized by fluorescence microscopy. The simulation results indicate that the addition of PE reduces the density of modified asphalt by less than 5%, and a higher density of PEA is associated with a lower FVR. When the FVR is close, the mechanical properties are greatly influenced by the DP and configuration. The DP and the number of chains are the main parameters impacting the compatibility between PE and asphalt, based on the Flory–Huggins parameter analysis. Decreasing the DP of PE (e.g., 50, with a minimum Flory–Huggins parameter and a relative molecular mass of 1300) will significantly increase the compatibility between asphalt and PE. LDPE−2 has better compatibility with asphalt, possibly because LDPE−2 has higher purity. These findings provide valuable insights into plastic thermal cracking and industrial modification practices.

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Section: Introductionmentioning

confidence: 99%

Microscopic Properties of Asphalt and Polyethylene at an Extraordinary High Dosage through Molecular Dynamics Simulation

Jin,

Li,

Chen

et al. 2024

Buildings

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“…The reinforcement effect of different fibres on the asphalt mixture was employed by using the fracture curve of the SCB test and DIC method by Yang et al [11]. Radeef et al [12] used DIC to quantify the impact of different asphalt modifiers (crumb rubber and plastic waste) on the size of the plastic zone of the material by monitoring crack development by the SCB test. The definition of the load rate at which it is possible to observe the mechanism of fracture and creep deformation for the evaluation of the low-temperature performance of an asphalt mixture was obtained by this method [13].…”

Section: Introductionmentioning

confidence: 99%

Pavement Structure Characteristics and Behaviour Analysis with Digital Image Correlation

2023

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Digital image correlation (DIC) is a method of point displacement measurement by an optical system. If two cameras are used for capturing the same point displacement, three-dimensional data are obtained using the 3D-DIC method. The areas of application of this method in pavement construction are diverse, but it is mainly used for displacement monitoring during standard tests of the failure of specimens due to load application. Furthermore, DIC technology was used only for testing particular material characteristics and assuming their influence on the overall pavement system. Within this research, DIC was applied in two areas: defining material mechanical characteristics and analyses of pavement structure behaviour under cyclic loading. The scope of this research was to gain more insights into DIC’s potential application within pavement behaviour analyses, specifically on cement-bound granular material (CBGM) characterisation. Results from this study confirm the suitability of 3D-DIC technology for pavement material characterisation. Furthermore, it is shown that certain trends of material behaviour defined on the simple material level of each independent pavement layer will significantly differ when it is placed in the system, and this kind of complex analysis is possible by using 3D-DIC technology.

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“…Under load, existing air voids may merge, resulting in microcracks at the interface between aggregate and mastic. Microcracks continue to expand and grow under deformation, forming macro cracks and increasing air voids [ 13 ]. Xu G et al [ 14 ] extracted the internal void structure characteristics of asphalt mixture through an X-ray computed tomography (CT) test and three-dimensional (3D) image reconstruction technology.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Rutting Damage by the Change of Air-Void Characteristics in the Asphalt Mixture Based on Two-Dimensional Image Analysis

et al. 2022

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In the process of the rutting test, the air-void characteristics in asphalt mixture specimens are a dynamic change process. It is of great significance to systematically study the correlation between the change of air-void characteristics and the depth of the rutting slab and establish a relationship with damage. In this paper, the air-void information of rutting specimen sections with different loading cycles (500, 1000, 1500, 2000, 2500, and 3000 times) is obtained by two-dimensional image technology. The dynamic change process of the micro characteristics of internal air voids of two graded asphalt mixtures (AC-13 and AC-16) under cyclic wheel load is analyzed, and it is used as an index to characterize the microstructure damage of the asphalt mixture. The results show that the variation of air-void distribution, air-void shape characteristics, and air-void fractal dimension with the loading process can well characterize the permanent deformation law of the rutting slab. The fractal dimension of the air void increases with the increase in load. It is a dynamic process in which the air-void content changes with crack initiation and propagation. After rutting deformation, the total air-void area and average air-void size of the sample increase, and the total air-void number decreases. Because microcracks are formed in the specimen after rutting damage, the aspect ratio of the air void increases, and the roundness value decreases.

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Characterisation of cracking resistance in modified hot mix asphalt under repeated loading using digital image analysis

Cited by 16 publications

References 46 publications

Microscopic Properties of Asphalt and Polyethylene at an Extraordinary High Dosage through Molecular Dynamics Simulation

Microscopic Properties of Asphalt and Polyethylene at an Extraordinary High Dosage through Molecular Dynamics Simulation

Pavement Structure Characteristics and Behaviour Analysis with Digital Image Correlation

Characterization of Rutting Damage by the Change of Air-Void Characteristics in the Asphalt Mixture Based on Two-Dimensional Image Analysis

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