2026-09-23T17:10:49Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/50423 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Embargo set by: Seth Robbins for item 50534 Lift date: 2016-09-16T17:18:17Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 50534 on 2016-09-22T20:59:12Z. http://hdl.handle.net/2142/50423 en Copyright 2014 Ziad Ghauch Micromechanical finite element modeling Al-Qadi, Imad L. Ghauch, Ziad 2014-09-16T17:17:14Z 2014-09-16T17:17:14Z 2016-09-22T20:59:12Z 2014-08 2014-09-16 2014-08 Asphalt Concrete (AC) is a composite material consisting of natural or recycled aggregates blended with petroleum-based binder. The majority of pavements in the U.S. include AC materials which are often exposed to the adverse effects of moisture. Moisture damage is one of the major factors that decrease the service life of pavements by causing and/or facilitating the development of several distresses. In this context, this study numerically investigates the effect of moisture presence on the micro, meso, and macroscale responses of AC materials. A Micromechanical modeling framework based on the Finite Element Method (FEM) was developed to examine the potential of moisture damage in AC materials. The microstructure of the material was characterized using the non-destructive X-ray Computed Tomography (CT) technique. Images obtained from X-ray CT scans were used to generate FEM-based micromechanical models. Preliminary analyses were performed to identify the Representative Volume Element (RVE) of the composite AC material. It was observed that relatively small window sizes, as low as 15 mm, were able to reasonably capture the bulk and shear moduli of the AC mixture. A hydro-micromechanical approach for studying moisture damage was followed. Moisture fields throughout the microstructure were generated in a mass diffusion procedure followed by mechanical loading with the properties of AC constituents evolving as a function of moisture state. Results obtained quantified the contribution of cohesive and adhesive damage on the overall mixture response to moisture presence. Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-06-04T13:46:26Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Ghauch_Ziad.docx: 15439397 bytes, checksum: 8db841d4034f8b2f625a905c76e45b6c (MD5) Ghauch_Ziad.pdf: 3614193 bytes, checksum: f6ef9376eb6227e360bb776f1abd7631 (MD5) Made available in DSpace on 2014-09-16T17:17:14Z (GMT). No. of bitstreams: 2 Ziad_Ghauch.pdf: 3661338 bytes, checksum: 79cca3827f4577139d964ab2b20e5a48 (MD5) license.txt: 4060 bytes, checksum: 409b4998bc782ed2cdb3e54876cc5780 (MD5) asphalt concrete moisture damage Micromechanical finite element modeling of asphalt concrete materials considering moisture presence text Civil & Environmental Eng 1251 Civil Engineering 0106 University of Illinois at Urbana-Champaign Thesis M.S. MS:Civil Engineering -UIUC 10KS0106MS