The sand: the final status
All in all, some 240 million m³ of sand was required for the construction of the first phase of Maasvlakte 2. The lion’s share of this sand, some 210 million m³, is extracted from offshore sand pits in the North Sea. Another share of the sand became available by the deepening of the port basins, the cut through of the Yangtzehaven and during realisation of specific projects in the existing port area.
To top off the top and inside of the stony dune, as part of the hard seawall in the northwest, clay was required. The clay is applied in several layers. A total of 191,086 tonnes was brought in to fullfil the job.
The rock: the final status
Since January 2010 till the end of August 2011, a bulk carrier unloaded 90,000 tonnes of rock every two weeks at the building site in the Yangtzehaven. The rock was shipped in from Bremanger, a district some 200 km north of the Norwegian city of Bergen. This material is now part of the protection of Maasvlakte 2 from the sea.
Total volume of rock shipped in:
Over 5,500,387 tonnes
Total volume of rock incorporated in the hard seawall:
> Wet: over 2,583,485 tonnes
> Dry: over 3,800,543 tonnes
Blocks taken from the block dam of the existing Maasvlakte:
Blocks build in new block dam:
The quarrystone rocks was used to construct the hard seawall, which is 3,5 km long. The seawall consists of a stony dune and a block dam. The stony dune incorporates the Norwegian quarrystone. For the block dam, which lies in the water in front of the stony dune, the contractors recycled the large blocks of the late Maasvlakte seawall.
A special docking area was constructed for the heavy bulk carrier, which passed by Maasvlakte every two weeks over a period of two years. A conveyor belt transported the quarrystone to the shore. Here, the rock was distributed across the site via a swivelling transporter belt. This unloading process alone allready took 36 hours. Dumpers, i.e. 'tipper trucks', subsequently transported the quarrystone to a sifting installation. After two weeks, the whole process would started all over again.
Monday 30 January 2012 Rotterdam alderman Jeannette Baljeu (Port, Transport and Regional Economics) placed the last block in the dam of the hard seawall. The dam now consists of 19,558 blocks, each weighing more than 40,000 pounds. Consortium PUMA especially developed the Blockbuster for this heavy task. Since April 2011 this special crane build in the concrete cubes (2.5 x 2.5 x 2.5 m) with a precision of 15 centimeter, day and night. In conclusion the Blockbuster placed heavy water stone till the end of February 2012. PUMA handed over the entire hard seawall to Port of Rotterdam in april of that year.