Certification of Combustion Byproducts

KEMA provides certification of combustion byproducts services in its own STERLAB-accredited laboratory for residual materials and building quality

Laboratory for residues and building quality
KEMA has its own "RvA-Testing L046" accredited laboratory for Residual Materials and Building Quality, where all manner of questions relating to the behavior and properties of concrete and similar materials and products can be investigated. The lab is the first in the Netherlands to be accredited under NEN-EN-ISO/IEC 17025:2000. Our experts specialize in the testing of concrete related products and the raw materials used in their manufacture, such as fly ash, waste incineration slag, sand and grit, cement, repair mortars, impervious structures and concrete paving blocks and tiles. A detailed scope of our accredited services can be found in the PDF-document (in Dutch) at the right side of this page.

Mechanical properties can be examined using a special rig capable of performing bending tests, fission tests, tensile tests and compression tests on concrete test pieces with loads of up to three thousand kilo-Newton. In addition, there is an integrated bending, tensile and compression test rig capable of applying up to three hundred kilo-Newton. Facilities are also available for testing the elasticity modulus of a sample. A wide range of physical tests can be performed as well, including water penetration tests for impervious structures, based on standards such as CUR63, ISO DIS 7031 and many others. Mercury porosimetry analyses are used to determine pore volume and pore size distribution in ceramic materials, while numerous other techniques are available for determining the physical properties of process residues, waste substances and raw materials used in the manufacture of building products. KEMA also works as an independent verification laboratory for various external certification bodies, including BMC and KIWA.

Bottom ashes
After refinement and certification, bottom ashes can be sold as materials for civil engineering applications. KEMA provides certification services to nine of the eleven waste incineration plants in the Netherlands. Our certificates serve as evidence that the bottom ashes comply with the requirements of the Building Materials Decree. Both ferrous and non-ferrous coarse residues are completely reused. The remainder is land filled or immobilized. Our extensive experience with the certification of incineration bottom ashes and the recycling of residues of all types, coupled with our expertise in environmental legislation, makes KEMA the obvious choice for support in fields such as:
- maximizing the scope for the sale of your residues
- enhancing the quality of your residues
- refining and treating fly ash and flue gas cleanup residues.