Testing of raw materials, product properties and application

In order to carry out comprehensive quality assurance, the control of the raw materials used is already crucial. To this end, each AAC and Multipor plant at Xella receives a test plan at the beginning of each year and sends a complete set of raw materials to our research site in Brück for testing. In addition, products are taken from the plants as part of internal quality benchmarking and tested at the accredited testing center for normative specifications regarding compressive strength, bulk density, shrinkage, and thermal conductivity.

Another important aspect is the internal approval process. Prior to its use, every new raw material, whether cement, lime, sand or auxiliary material, is tested to determine if it is suitable for production according to our internal raw material requirements. Only then are products manufactured in the plant using the new raw material and afterwards tested for compliance with standards and Xella’s internal guidelines. In addition to testing physical properties, application tests are also carried out. For this purpose, walls are built, or climatic tests are conducted, among other things. In 2016, the internal approval process was started with 14 applications. In 2020, there were already 180 applications.

Quality monitoring at Xella

Quality thinking means quality assurance of our products from the raw materials used to the finished product, whether aerated concrete, calcium silicate bricks or Multipor. " We make a huge effort to ensure that our products are permanently available on the market in high quality. As the saying goes: only a satisfied customer is a good customer," Henry Hantschick summarizes.