Degradation mechanisms; science-based durability tests; reliability-based models, including economic factors for predicting expected lifetimes of concrete; statistical modeling to predict short- and long-term performance.
 
Projects
1. Determining Early Stiffening and Strength Gain by NondestructiveTechniques for Early Serviceability of Structures. The PIs are Surendra Shah (NU),Jan Achenbach (NU), and Kolluru Subramaniam (NU), with collaboration by J.P.Mohsen (UL), and the IA is J.C. Roumain (Holnam). This project will develop a nondestructive test for measuring setting and hardening of fresh concrete in the field. It will utilize an ultrasonic technique already developed in ACBM that measures the reflection factor of a high-frequency ultrasonic wave at the interface between concrete and a steel plate.

2. Delayed Ettringite Formation. The PI is Tom Mason (NU).

3. Development of New Mechanistic Performance Model for Predicting Fatigue Life of Slabs on Grade. The PI is Will Hansen (UM).

4. Pore Solution-Solid Interactions in Cement Paste: Molecular Modeling of Fluids in Nanospaces. The PI's are Jim Kirkpatrick and Andrey Kalinichev (UIUC).

5. Relating Damage, Transport, and Long-Term Performance for Use in Life Cycle Modeling. The PI is Jason Weiss (Purdue).