Unique concrete repair project at Diezer Bridge A59

According to the supplier, the mortar experienced its premiere in Den Bosch. SealteQ assisted Rijkswaterstaat and main contractor Boskalis in repairing the cracked thrust plates of the Diezebrug on the A59. The old cracked concrete slabs were removed, new reinforcement glued in, new concrete poured, and neatly finished.

Traditional Pouring Was not an Option

The concrete plants were unable to supply a mortar that met the requirements, making traditional pouring of the floors not an option. Within four hours, the mortar had to have a strength of thirty newtons per square millimeter. Cracking due to shrinkage stresses could result from such rapid curing.

Solution: Self-Compacting Cast Mortar V2a/160

The solution was found in the self-compacting cast mortar V2A/160, which has a nominal grain size of 16 millimeters and a water-cement ratio of 0.3. Special added steel fibers absorbed the shrinkage.

Organized Process Ensured Rapid Asphalting

In a tightly organized process, the concrete was poured continuously in one night at the two locations with over twenty people. All the machines required for this were present in duplicate at the location. This was done to avoid the risk of downtime. During the pouring, a pallet with a ton of grout was used every three minutes. The poured sections could be asphalted within a few hours.