Transport Properties & Durability Modeling
With proper modeling techniques we can understand the durability conditions faster, cheaper, and more accurately. This helps in every stage of construction and maintenance and will allow better administration of new and existing infrastructure. The problem of the sulfate attack as a major durability concern is addressed specifically in this project. Aspects of cement chemistry, concrete physics, and mechanics are applied to derive a model for predicting sulfate penetration, reaction, damage evolution, and expansion, leading to degradation of cement-based materials exposed to a sulfate solution. The models developed address the interaction effects of various parameters indicate the need for calibration of the theory with the available experimental data. A collaborative program is conducted with Scientists at the National Institutes of Standards and Technology (NIST) to apply the proposed models to the wide range of experimental data. Current approaches used are based on refining the model parameters through parametric analysis, consideration of specific boundary conditions, and calibration with a variety of available experimental data.