Grout, corrosion protection systems
Grout is used for filling ducts for internal bonded tendons or sheaths for external tendons. It serves to establish a form and interference fit between the concrete and the prestressing wires and to provide corrosion protection.
Due to the high stresses, prestressing steels are especially susceptible to corrosion. Temporary or permanent corrosion protection measures serve to mitigate this risk.
Regulatory framework
DIBt grants national technical approvals (abZ) for grout and corrosion protection systems where the products significantly deviate from the applicable Technical Building Rules (cf., in particular, MVV TB, Part C 2).
DIBt grants general construction technique permits for construction techniques comprising grout and corrosion protection systems where they deviate from the applicable Technical Building Rules (cf., in particular, MVV TB, Part A 1).
The manufacture of cementitious grout and the grouting itself require special expertise and are subject to surveillance by a recognised inspection body (cf. Model Ordinance on the surveillance of activities involving construction products and construction techniques (MÜTVO)). You can find qualified bodies in the Directory of recognised testing laboratories, inspection and certification bodies (PÜZ-Verzeichnis) in the column on the right.
National procedure
To prepare an abZ/aBG for your construction product, we need an application from you. We recommend that you contact us prior to doing so. Feel free to send us your enquiry informally via email to dibt(at)dibt(.)de or to the competent technical contact listed in the top right.
For a first assessment, please send us the following information:
- Description of the construction product and its intended field of use
- e.g. material, configuration, number of sizes, variants, dimensions
- e.g. use in walls, ceilings, interior construction, building services
- Description of the construction technique and its field of application
- e.g. design of walls, ceilings, elements, etc., and interaction of components
- e.g. application in foundation engineering, reinforced concrete construction, building insulation; as load-bearing or non-load-bearing component; under static and quasi-static loading; fire exposure; other environmental exposures
- Information regarding impact on regulatory concerns
- in particular structural integrity, fire protection, health and environment protection, sound insulation as well as thermal performance
- Explanation of need for an abZ/aBG
- Do you significantly deviate from the Technical Building Rules?
- Or do neither Technical Building Rules nor generally recognised technical rules exist?
- Contact details
- preferably email address and/or telephone number, as well as name, organisation/company, and postal address
We will then contact you to clarify the next steps.
If you already hold a DIBt approval and/or construction technique permit and wish to apply for an amendment, supplement, or renewal, please use the form provided below.
- pdf-Datei Application for amendment / supplementation / renewal of a national technical approval and/or construction technique permit (4 pages ) Last updated: 10 April 2024; Application form
European Technical Assessment (ETA)
To start the ETA procedure, please submit the form below. We will then check if the prerequisites for issuing an ETA are met, i.e., in particular, if the product is not fully covered by an existing harmonised standard. If the prerequisites are met, we will check whether a European Assessment Document (EAD) covering the requested assessment scope already exists or still needs to be developed. If an EAD needs to be developed or amended, a complete technical file needs to be established before the procedure can begin.
- pdf-Datei Form for requesting a European Technical Assessment (ETA) (2 pages ) Last updated: 11 March 2025
| Subject concerned | Applicant | Decision no. |
Validity
from / to |
|---|---|---|---|
| Vorübergehender Korrosionsschutz mit ROSTSCHUTZ 310 für DYWIDAG-Einzelspannglieder (Stabverfahren) mit nachträglichem Verbund | DYWIDAG-Systems International GmbH Neuhofweg 5 85716 Unterschleissheim | Z-13.6-10 |
Z:
22.11.2021 G: 03.12.2026 |
| Vorübergehender Korrosionsschutz mit ROSTSCHUTZ 310 für Stabspannglieder mit nachträglichem Verbund | Stahlwerk Annahütte Max Aicher GmbH & Co. KG 83404 Ainring - Hammerau | Z-13.6-137 |
Z:
06.05.2022 G: 11.05.2027 |
| Einpressmörtel nach dem Aufbereitungsverfahren - SUSPA mit SWIBO Typ 1973 | DYWIDAG-Systems International GmbH Neuhofweg 5 85716 Unterschleißheim | Z-13.6-7 |
Z:
17.08.2022 G: 03.08.2027 |
| Einpressmörtel nach dem Aufbereitungs- und Einpressverfahren "BBV" | BBV Systems GmbH Industriestraße 98 67240 Bobenheim-Roxheim | Z-13.6-92 |
Z:
26.02.2024 G: 03.02.2029 |
| Subject concerned | Applicant | Decision no. | Issued on |
|---|---|---|---|
| NONTRIBOS® VZ-Inject | August Gähringer GmbH & Co. KG Fabrik technischer Öle & Fette Königgrätzer Straße 14- 34 47053 Duisburg DEUTSCHLAND | ETA-13/0846 |
18.12.2018 |
| Grouting cement CEM I 42.5 R (ep) rheoment | thomas zement GmbH & Co. KG Werk Dornburg In der Oberaue 07774 Dornburg-Camburg | ETA-25/0305 |
12.08.2025 |