Mesoscale modeling of fracture in cement and asphalt concrete

Main Article Content

Haider M. Al-Jelawy
Ayad Al-Rumaithi
Aqeel T. Fadhil
Alaa J. Naji

Keywords : mesoscale model, damage model, fracture energy, cement concrete, asphalt concrete, disk-shaped compact tension test
In this paper, mesoscale modeling is performed to simulate and understand fracture behavior of two concrete composites: cement and asphalt concrete using disk-shaped compact tension (DCT) tests. Mesoscale models are used as alternative to macroscale models to obtain better realistic behavior of composite and heterogeneous materials such as cement and asphalt concrete. In mesoscale models, aggregate and matrix are represented as distinct materials and each material has its characteristic properties. Disk-shaped compact tension test is used to obtain tensile strength and fracture energy of materials. This test can be used as a better alternative to other tests such as three points bending tests because it is more convenient for both field and laboratory specimens in addition to its accurate results. Comparing the numerical results of the mesoscale models of cement and asphalt concrete specimens with experimental data shows that these models can predict the behavior of these composite materials very well as seen in the curves of load-crack mouth opening displacement (CMOD). Also, the mesoscale modeling highlights the variability of crack direction where it is dependent on the random distribution of aggregate.

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Al-Jelawy, H. M., Al-Rumaithi, A., Fadhil, A. T., & Naji, A. J. (2021). Mesoscale modeling of fracture in cement and asphalt concrete. Scientific Review Engineering and Environmental Studies (SREES), 30(3), 439–450.

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