The Characterisation of Fracture Resistance of Asphalt Mixtures Containing Rubber Modifiers and a Wax-Based Additive

Sharvin, Poovaneshvaran and Mohd Rosli, Mohd Hasan and Ali, Jamshidi and Mohd Fahmi Haikal, Mohd Ghazali and Yang, Xu and Putra Jaya, Ramadhansyah (2023) The Characterisation of Fracture Resistance of Asphalt Mixtures Containing Rubber Modifiers and a Wax-Based Additive. Advances in Materials Science and Engineering, 2023. pp. 1-16. ISSN 1687-8442. (Published)

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Asphalt mixture modifcation with rubberised material frequently results in improved characteristics and extended service life in actual application. Tis research characterised the synergistic consequences of rubber modifers (crumb rubber powder (CRP) and natural rubber latex (NRL)) and wax-based admixtures (Tough Fix Hyper (TFH)) on the performance of the asphalt mixture from the fracture energy and laboratory fracture resistance perspectives. Semicircular bending (SCB) and indirect tensile strength (ITS) tests were conducted to assess the fracture properties of the asphalt mixture samples. To prepare asphalt mixture samples, the wet method was utilised. Higher CRP levels resulted in greater strength and a longer time to attain peak force for both control and mixtures containing wax admixture, as determined by SCB. Te interaction between the higher CRP or NRL content and the TFH additive enhanced the fracture resistance, indicating that the components are highly compatible. Te 10L + TFH additive produced the highest fraction of energy, indicating a more signifcant improvement than the counterpart mixes containing the CRP modifer. In addition, incorporation of the CRP and NRL increased the fracture plastic zone (FPZ), resulting in increased fracture toughness. Terefore, the gradient of fracture toughness and fracture energy in the asphalt mix depends on the rubber type, content, and TFH. Although the higher CRP, NRL, and TFH improve the fracture energy and cracking resistance, they increase the crack initiation and propagation velocities, whereby the high bitumen stifness makes the mixture more brittle than the control mixture. Caution should be exercised when selecting the content of rubber modifer and TFH for the asphalt pavements in low-temperature service. Also, there is a direct interconnection between fracture resistance and fracture energy in the mixtures containing CRP, NRL, and TFH. Such correlations can be used as the premise of predictive micro- and macromodels to evaluate mixture performance in terms of fracture resistance.

Item Type: Article
Uncontrolled Keywords: Characterisation of Fracture Resistance; Asphalt Mixtures; Rubber Modifiers; Wax-Based Additive
Subjects: T Technology > TE Highway engineering. Roads and pavements
Faculty/Division: Faculty of Civil Engineering Technology
Depositing User: PM Dr. Ramdhansyah Putra Jaya
Date Deposited: 01 Feb 2023 04:36
Last Modified: 01 Feb 2023 04:36
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