High standards for potable water containers
Potable water is a comestible. Therefore, there are justifiably high standards for materials and construction here. This applies to the new construction of containers just as much as during the rehabilitation of existing structures. In Germany the regulations of the DVGW (Deutscher Verein des Gas- und Wasserfaches e.V.) are crucial.
New building of potable water containers
Generally, potable water containers are built from reinforced concrete according to state of the art standards. For the final coating of the surface, the requirements on the concrete of the container (DVGW work sheet W 300) are not so extreme and allow a more cost effective construction. In particular there is the possibility of eliminating small quality differences that arise in the concrete preparation, subsequently in the coating process, instead of tearing down the affected wall sections again.
The type of coating is specified by the operator of the water container. In the case of mineral coating, the largest possible coat density is required. You can only achieve the durability of a good plastic coating with a 10 mm layer thickness. Mineral coatings are smoother and less porous than pure concrete, but a plastic coating exceeds both. In addition it has significant advantages when it comes to cleaning the containers.
Rehabilitation of potable water containers
In the rehabilitation of potable water containers, there is no serious alternative to a coating in any case. This applies both to the result and the costs. CCI Spectrum Inc. has modified the polyurea material that they developed for use in the potable water area. In order that FSB Bautechnik can use the new technology in the rehabilitation of potable water containers, a potable water certificate (W 270) from the DVGW is necessary. As soon as this is available, FSB Bautechnik will also be active in this field.