treated waste in the most efficient way, primarily as a replacement for primary sources of raw materials, it should
have required properties resulting from its further use.
Meeting of the requirements resulting from the future use of solidification product is achieved mainly by
selecting the appropriate neutralization sludge and economical-efficient solidification binders. At first, it is
therefore necessary to design and then examine large amount of solidification formulas.
The suitability of various solidification recipes need to be checked first on a laboratory scale and then
subsequently the most technologically and economically acceptable option must be chosen. After the thorough
examination of the properties of solidification products, this new material may be used in practice. To prevent any
release of contaminants from solidification product resulting in environmental pollution, it is inevitable to monitor
the long-term durability of the solidification product (steady required properties at any time on the place of its use).
The trend of waste maximum utilization is also provided in national legislation. Waste Act No. 185/2001 in
force is based on Directive of the European Parliament and Council No. 98/2008/ES and states hierarchy of waste
management, which emphasizes the prevention of the waste production. The waste disposal (landfill without
further use) is in this hierarchy of waste management in the last place.
For the possibility of further use of solidification product it is necessary to maintain certification (conformity
assessment). Government Directive No. 163/2002 offers the possibility how to make the conformity assessment or
it can be through a voluntary certification (used in building within the meaning of Act No. 183/2006), while it
would be possible to use it only in the Czech Republic. Because of currently missing standards or other technical
regulations in the Czech Republic dealing with the possibilities of use solidification products, the building technical
certificate (BTC) has to be provided at first. BTC provide technical determining of the product properties by the
authorized person. When the BTC is drafted it can be based on standards and technical regulations developed for a
similar type of material (e.g. a stabilized fly ash). Authorized person on the basis of BTC defines the technical
characteristics associated with the basic requirements and also determines their levels due to the intended use of
solidification product in construction. When BTC is released, the certification of solidification product can be
processed. After release of the certificate, solidification product can be used for its intended use, which is specified
in the relevant technical documents.