For the determination of the bulk density, a sufficiently large material sample is required to obtain five test specimens from the sample. This is carried out gravimetrically by weighing the samples once in air. Then the samples are soaked in water for at least 24 h to expel the air from the pores of the samples. After this has happened, the samples are weighed again in air and then weighed again under water. The raw density of the material sample is then calculated from the results obtained. This procedure is carried out five times to keep the source of error as low as possible. 

Classification of asbestos products:


Weakly bound asbestos products:

Weakly bound asbestos products are divided into:

  • Sprayed asbestos and
  • Similar asbestos products

These products have a bulk density of <1000 kg/m³.


Asbestos cement products:

Asbestos cement products are cement-bound building products containing asbestos with a bulk density of > 1400 kg/m³. The asbestos content of asbestos cement products is usually less than 15 percent by weight. Due to the strong binding of the asbestos fibres by the binder, these products are also called firmly bound asbestos products.

  • Asbestos cement products are for example
  • Asbestos cement corrugated sheets
  • Asbestos cement façade panels
  • Asbestos cement water pipes
  • Asbestos cement flower boxes

    Other asbestos products:

    This includes asbestos products that are neither weakly bound nor asbestos cement products. These products have a bulk density of 1000 kg/m³ – 1400 kg/m³. Depending on the type of product, these asbestos products are classified as weakly bound asbestos products or as asbestos cement products. The classification is not always easy and should be left to experienced experts.

    Other asbestos products are for example:

    • Vinyl flooring panels (flex panels)
    • Flat gaskets between pipe flanges