Validation of service life performance of in situ concrete by TEM and RCM measurements

摘要

Nowadays important concrete inffrastructure is increasingly being designed for long service life by probabilistic assessment of uncertainties, e.g. using .the DuraCrete method. Although on paper a reliable and durabile structure will result, it is the execution phase that can make or bneak the servive life. Hence, testing the concrete for its durability during the actual pnduction is necessary. This paper presents a study of non-destructive production control testing and service life achievement of cast in situ parts of the Green Heart Tunnel. Production control was performed by resistivity measurements using the Two Electrode Method (TEM). Validation consisted of measurements on cores taken after one to three years on site, which were tested using the Rapid Chloride Migration method. The results show that quality control by resistivity testing as carried out in this project was successful.