IS2C Annual Workshop

Last week the IS2C Annual Workshop took place in Vught and we were (of course) there!
During the 2-days meeting we went also to visit two bridges (on the highway A59) affected by ASR.
Here some picture of the technical visit. More information about all the projects can be found at http://is2c.nl/.

Vlijmen - Oost bridge.

Heidijk bridge..

Map cracking and calcium leaking. 

Cracking over the concrete repair material.

The IS2C team.

CT-Scan of ASR reacted samples

Today I have been busy with a trial CT-scan of RILEM AAR-4 samples. The Main aim was to get a 3-dimensional view on how cracks were distributed in concrete medium. Following 3 videos show Top, Front and side view respectively. While progressing through the sample, we can see how cracks are located and progressed.

Current sample size is 15mm x 15mm x 7 mm, resolution of images are around 13 microns\pixel. Largest observed crack width is roughly 80 microns.