The production of coal combustion products (CCPs) in all the European member states is estimated to be about 100 million tonnes. The utilisation of CCPs is well established in some European countries, based on long term experience and technical as well as environmental benefits. The CCPs are mainly utilised in the building material and construction industry as a replacement for natural resources. By their utilisation, they help to reduce energy demand and greenhouse gas emissions to atmosphere for mining and production of products which are replaced and to save natural resources. By this, the use of CCPs contributes to the sustainability of construction materials. Furthermore, the majority of the CCPs is produced to meet certain requirements of standards or other specifications with respect to utilisation in certain areas. The standards and specifications are subject to regular revision by CEN or national authorities.