Top-Down Cracking of Hot-Mix Asphalt Layers: Models for Initiation and Propagation - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: eBooks (https://forum.civilea.com/forum-63.html) +--- Forum: Traffic Engineering (https://forum.civilea.com/forum-67.html) +--- Thread: Top-Down Cracking of Hot-Mix Asphalt Layers: Models for Initiation and Propagation (/thread-39065.html) |
Top-Down Cracking of Hot-Mix Asphalt Layers: Models for Initiation and Propagation - mahyarov - 10-25-2012 Top-Down Cracking of Hot-Mix Asphalt Layers: Models for Initiation and Propagation Author: Roque, Reynaldo | Size: 5.46 MB | Format: PDF | Quality: Original preprint | Publisher: Transportation Research Board | Year: 2010 | pages: 286 | ISBN: -
The research focused on: 1) Finalizing the two primary model components [i.e., a viscoelastic continuum damage (VECD) model for crack initiation and a hot mix asphalt fracture mechanics (HMA-FM) model for crack propagation], involving development and integration of sub-models that are relevant to dominant top-down cracking mechanisms into each model component; 2) Verifying the reasonableness of the two enhanced primary model components (i.e., the VECD-based model and the HMA-FM-based model); and 3) Developing for and integrating with the HMA-FM-based crack propagation model a simplified fracture energy-based crack initiation model to illustrate the potential of a completed system and to help formulate a plan for integrating, calibrating, and validating the two enhanced primary model components. In summary, the work performed clearly indicates that the VECD-based model and the HMA-FM-based model developed and evaluated in this project can form the basis for a top-down cracking model suitable for use in the Mechanistic-Empirical Pavement Design Guide (MEPDG). Furthermore, the component models can form the basis for an improved performance model to predict multiple cracking distresses simultaneously, including top-down cracking, bottom-up cracking, and thermal cracking. The project also identified and recommended research efforts to develop calibrated/validated top-down cracking performance models for use in the MEPDG. Code: *************************************** |