Experimental investigation and multi-objective optimization of fracture properties of asphalt mixtures containing nano-calcium carbonate

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@Article{GHASEMZADEHMAHANI:2021:CBM,

• author = "Ahmad {Ghasemzadeh Mahani} and Payam Bazoobandi and Seyed Mohsen Hosseinian and Hassan Ziari",
• title = "Experimental investigation and multi-objective optimization of fracture properties of asphalt mixtures containing nano-calcium carbonate",
• journal = "Construction and Building Materials",
• volume = "285",
• pages = "122876",
• year = "2021",
• ISSN = "0950-0618",
• DOI = "doi:10.1016/j.conbuildmat.2021.122876",
• URL = "https://www.sciencedirect.com/science/article/pii/S095006182100636X",
• keywords = "genetic algorithms, genetic programming, Fracture toughness, Semi-circular bending, Nano-calcium carbonate, GMDH, GP, Two-objective optimization",
• abstract = "The low temperature fracture is one of the most important challenges in asphalt mixtures, which, if not paid, will lead to high maintenance costs. Therefore, researchers are looking for different materials to enhance the fracture behavior of mixtures. As the asphalt surface is affected by different types of loading throughout their operational lifetime, this study explores the impact of nano-calcium carbonate (NCC) on the fracture behavior of mixtures in different fracture modes. For this purpose, semi-circular bending (SCB) tests were applied to specify the fracture toughness. Two bitumen types of PG 64-22 and PG 58-28 were modified with 1percent, 3percent, 5percent and 7percent NCC. Finally, the fracture toughness of samples in pure mode-I, pure mode-II and mixed-mode I/II was investigated at -10 degreeC. Moreover, the prediction models of multivariate regression (MVR), group method of data handling (GMDH) and genetic programming (GP) were provided to present the best model with higher accuracy in order to obtain optimum NCC content with two objectives of KIf and KIIf (the fracture toughness in modes I and II). The results indicated that NCC had a notable influence on the fracture toughness. However, in each mode and bitumen, the additive percentage that is associated with the highest fracture toughness was different. From the fracture tests, the most optimal percentage of NCC was determined between 3percent and 7percent and 3percent to 5percent for mixtures made with bitumen types of PG 64-22 and PG 58-28, respectively. Among the various models, GMDH had the greatest R2 so that the R2 amount of GMDH for KIf and KIIf was 98.68percent and 99.02percent, respectively. The two-objective optimization results showed that 4.17percent, 3.62percent and 6.29percent NCC were the best optimal amounts to maximize KIf and KIIf amounts simultaneously for all mixtures and mixtures made with bitumen types of PG 64-22 and PG 58-28, respectively",

}

Genetic Programming entries for Ahmad Ghasemzadeh Mahani Payam Bazoobandi Seyed Mohsen Hosseinian Hassan Ziari

Citations