iRLPD Moisture Damage Test
(incremental Repeated Load Permanent Deformation)
- Sample size: SCB 150-mm x 50-mm
- Applies incremental repeated load before, during, and after conditioning
- Determines minimum strain rate (m*)
- Test Temperature: 25°C
- Moisture damage is determined by the ratio of m* (after to before).
- m* ratio >1.5 indicates moisture susceptibility
Advantages
- Damage is caused by pore pressure, which is related to field
- Higher precision since same specimens used before and after
- Sample preparation and testing time is reduced by 80%
- Total conditioning and testing time is 4 hours
- Better assessment of moisture resistance by using smaller sample size
- Verified with moisture susceptible and moisture resistant mixtures
Reference:
Azari H., Mohseni A., (2013), “Improvement of the Test Method for Determining Moisture Damage Resistance”, Multi-Scale Modeling and Characterization of Infrastructure Materials, RILEM Book Series,Vol 8. Springer, Dordrecht