Melbourne Airport contracted Antoun for the replacement of 60 centre line concrete slabs on several taxiways in Melbourne International Airport. These slabs required replacement as they were coming to the end of their serviceable life.
Melbourne Airport, VIC
More than $10m
Slab replacement works were performed at night in an operational airport environment between 9pm and 5am during taxiway closures. Consistent communication measures were in place on site between the project team, subcontractors and the airport’s maintenance team to observe important airport safety controls and contingencies. The slabs were 7.5mx7.5m with a depth of 630mm; and up to 850mm depth in thickened edges totalling over 40m3 each. Additional removal of 200mm of unsuitable subgrade was removed and replaced with RapidSet leanmix on many slabs. 50mm dowels spaced at 400mm centres were installed with an embedment of 300mm into the adjacent slabs using a two-gang Minnich pneumatic drill at a rate of 15 seconds per dowel.
CTS Rapid Set high early strength cement was used with eight Volumetric Mixers producing the concrete to reconstruct the slabs. The concrete achieved flexural strength of 5.0MPa within just 24 hours of placement without using accelerants, allowing aircraft traffic to commence trafficking in as little as three hours after replacing each slab.