000004914 001__ 4914
000004914 005__ 20141119144604.0
000004914 04107 $$aeng
000004914 046__ $$k2002-06-02
000004914 100__ $$aSadd, Martin H.
000004914 24500 $$aMICROSTRUCTURAL SIMULATION OF ASPHALT MATERIALS: MODELING AND EXPERIMENTAL VERIFICATION

000004914 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004914 260__ $$bColumbia University in the City of New York
000004914 506__ $$arestricted
000004914 520__ $$2eng$$aAsphalt is a heterogeneous material composed of aggregates, binder cement and air voids, and may be thought of as a cemented particulate system. The load carrying behaviors are strongly related to the local load transfer between aggregate particles, and this is taken as the microstructural response. Numerical simulation was developed using two different finite element models, which were constructed to simulate the micromechanical response of the aggregate/binder system. The first model incorporated a network of frame elements with a special stiffness matrix developed to predict the load transfer between cemented particles. The second model used the commercial ABAQUS FEA code incorporating special user-defined continuum elements for the binder and rigid elements for the aggregate. Simulations of standard laboratory indirect tension tests have been conducted, and the results have compared favorably with experimental data. Further experimental verification has included tests on specially prepared cemented particulate systems, which have allowed detailed measurement of aggregate displacements and rotations using video imaging and computer analysis. Modeling simulations have been developed for a variety of material microstructures including aggregate gradation and distribution, binder volume and porosity.

000004914 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004914 653__ $$aAsphalt concrete, finite elements, microstructural modeling

000004914 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004914 720__ $$aSadd, Martin H.$$iDai, Qingli$$iParameswaran, Venkit$$iShukla, Arun
000004914 8560_ $$ffischerc@itam.cas.cz
000004914 8564_ $$s240924$$uhttp://invenio.itam.cas.cz/record/4914/files/533.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004914 962__ $$r4594
000004914 980__ $$aPAPER