Xstone
Xstone is a 2D version of Xstream and therefore a smaller version of Xbloc. Xstone can be produced in sizes ranging from 20-60 cm. Due to the different shape compared to Xstream, Xstone is produced in large quantities in an automated dry-cast production facility.
Xstone is applied in groynes, river guiding dams, shore protection, (offshore) scour protection, bottom protection, collision protection works, quay wall protection and as core filler for breakwaters and foreshore dams.
The main advantages are:
- The blocks are placed in bulk, using a crane with either a (double) stone clamp or hydraulic grab;
- Transportation in bulk with river barges;
- Once placed, Xstone has a high porosity of 60%;
- Groynes or guide dams can be made of Xstone blocks only, avoiding joints and transitions;
- Structures built with Xstone are flexible and can be adapted to mitigate effects of climate change;
- Xstone containes bio-active concrete: the concrete mix design attracts species and the structure creates habitats;
- Xstone is available in several configurations, including completely porous blocks;
- Xstone is very effective in terms of CO2 footprint and MKI score.
Xstone is made using low CO2 binders in combination with recycled materials as a standard. The blocks are highly interlocking. Therefore, steep slopes of 1:1 can be applied. The combination of the steep slopes and 60% porosity results in minimized material quantities in a structure.
The robust shape of Xstone promotes to apply it as singular product. Structures made with Xstone are flexible, meaning that any adjustments are simply made by adding or removing blocks (e.g. in the groyne application, increasing or lowering the height/length/width of the groyne is a matter of repositioning or removing the blocks. The blocks can be reused.).
As an Xstone structure is highly porous, it forms a habitat for aquatic life. In combination with bio-active concrete formulations, the structure promotes growth of algae as well as formation of life and habitats in the structure. Furthermore, the porous structure is also able to absorb wave energy created by inland shipping.
Xstone can also be placed in high currents, e.g. river guide dams, or be applied as offshore wind turbines scour protection whilst lowering material need, CO2 footprint, promoting aquatic life and being reusable.
