Today more than ever, environmental protection is our passion. It is essential to protect the environment, particularly our waterways as they are fundamental to human life and survival. Anchoring for plants containing water polluting substances that are not outfitted with two sealing levels must fulfil specialised requirements in accordance with the German Water Resources Law (WRL, in German WHG) and the regulations on facilities for handling substances that are hazardous to water (AwSV).
The guidelines of the Deutscher Ausschuss für Stahlbeton (DAfStb) “Concrete construction for the handling of water polluting substances” (BUmwS) require the use of bonded anchors that have a usability certificate issued by the building approval authorities. This requirement is ideally fulfilled by a general design certification. fischer has developed and tested a system confirmed as approved for use with existing liquid impermeable concrete (LI/LIP concrete), and has received the first general construction technique permit from the Deutsches Institut für Bautechnik (German technical authority and a serviceprovider for the construction sector DIBt) for a variety of media groups. For coated concrete, fischer has verified through an accredited testing institute and expert report that the fixing system fulfils the WRL. The system also has an ETA for static load, which is a requirement for the design certification.
No matter if LI/LIP concrete or coated concrete: The whitepaper from fischer will answer all key questions regarding WRL compliant anchoring:
When installing anchors in WRL sealing surfaces, a hole is drilled into the WRL surface, potentially reducing the tightness at this location. However, the tightness and resistance must be verified in the area of the anchors as well.
Now, fischer offers solutions for these applications that can be used to install anchors in WRL sealing surfaces according to the German Water Resources Law (WRL) and facilities regulation (AwSV).
With the injection mortar FIS EM Plus, fischer has obtained the first general design approval for WRL compliant anchoring in liquid-proof concrete (LI-/ LIP concrete). The system was comprehensively tested with materials in media list 4 of the German Institute for Structural Engineering (DIBt).
With fischer, you are on the safe side for anchorings in WRL sealing surfaces!
An anchor in LI concrete must be designed so that no liquid can penetrate through the anchor into the concrete. The drill hole can be constructed using hammer drilling or with a hollow drill bit. The drill hole depth must always be at least 50 mm less than the thickness of the fixing member. The epoxy mortar FIS EM Plus, anchor rod FIS A / RG M or internal-threaded anchor RG MI and WRL marking are required for anchors in LI concrete. The general design approval requires anchor materials made of stainless steel for WRL application.
The marking disc is an important part of the fischer WRL fixing system. It clearly and permanently indicates use of the correct system, and facilitates simple, reliable building approvals. It is mounted between the washer and attachment.
The seal is achieved by filling the annular gap between the anchor rod, attachment and base coating with FIS EM Plus mortar. The anchor solution in coated concrete includes epoxy mortar FIS EM Plus, the FIS A / RG M anchor rod or RG MI internal-threaded anchor and the WRL set. Sealing is tested for epoxy floor coatings.
The fischer WRL-Set is used for anchors in coated concrete. The WRL set is used to fill the annular gap with injection mortar FIS EM and seal it. The fixing point is labelled as a WRL compliant anchor. The epoxy mortar FIS EM Plus, anchor rod FIS A and the WRL set are required for anchors in coated concrete.