Approvals and monitoring

Through special tests for technical approvals the suitability  of construction products (e.g. cements and concretes) for specific areas of application can be demonstrated. We carry out tests for the following approvals:

  • National technical approvals (abZ)
  • European Technical Assessments (ETA)
  • KOMO-attests with product certificates in accordance with CUR 48

Our service range comprises all stages of the approval procedure, such as the application, the compilation and implementation of the testing programme, the preparation of the technical report and expert opinion on the suitability of the product.  For special construction projects accompanying self-supervision and third party inspection concepts are being provided to ensure the quality of the constituents and the building materials. Special concrete and mortar mix formulations (e.g. for self-compacting concrete, high strength concrete etc.) can be developed upon customer’s request and, depending on the intended application, be investigated and tested with standardized test methods or with tests specific to the respective task.

VDZ generates expert opinions in order to analyse damages on concrete constructions respectively to prevent damages in advance. For this, the well-equipped concrete laboratory offers a large variety of possibilities. For example, aggregates or concrete compositions are tested to answer the question whether one has to expect adverse affection of the durability, e.g. due to a harmful alkali-silica reaction (ASR) or a lacking freeze-thaw resistance. Furthermore, the service range also comprises the preparation of Life Cycle Assessments including the generating of Environmental Product Declarations (EPD) for cement and concrete. Our laboratory has modern technical equipment and is accredited according to EN ISO/IEC 17025 to carry out a variety of tests on concrete and aggregates.

Initial assessments and regular monitoring in accordance with the German Committee for Structural Concrete (DAfStb) booklet no. 526 for ready-mixed concrete plants

Monitoring the casting of concrete in the monitoring classes 2 and 3

Permanent concrete testing laboratoryDIN 1045-3, Annex B
Consulting of the construction company and the construction sites
Provision of equipment for testing of fresh concreteDIN 1045-3, Annex A
Training of site staff regarding the tests for the fresh concrete propertiesDIN 1045-3, Annex A
Checking the records of the site staff, periodic supervision of the testing of fresh concrete
Collection of test specimens on the construction site, testing of hardened concrete(particularly compressive strength)
Accredited supervisory agencyDIN 1045-3, Annex C
Monitoring of cracks, placing of plaster markers
Non-destructive determination of the concrete coverElectromagnetic


Dr. Christoph Müller

Dr Christoph Müller

+49-211-45 78-351

+49-211-45 78-296

Service offer

Concrete and mortar: testing of fresh and hardened concrete – tests regarding alkali-silica reaction – testing aggregates and admixtures

Quality standards

The VDZ gGmbH is accredited by the Germany's National Accreditation Body according to DIN EN ISO/IEC 17025.