Glass sand – UNI test method for the determination of non-glass inorganic material
Glass sand is used in the production of glass containers as a replacement raw material for waste glass. This is obtained by grinding the small pieces of waste glass together with the waste fraction from the ceramic sorting machines installed at the scrap treatment plants. The grinding can be performed wet or dry.
Commission Regulation (EU) No. 1179/2012 of 10 December 2012, establishing criteria determining when glass cullet ceases to be waste under Directive 2008/98/EC of the European Parliament and of the Council (End-of-Waste Directive), provides that only materials from the collection of glass containers, flat glass and household lead-free glass can be reused in the production of glass (the possibility that raw scrap contains lower quantities than other glass is accepted). Glass sand is included in these materials.
The End-of-Waste Directive also provides for the limits of acceptability for foreign materials (ceramic, iron, etc.) which must be respected and certified by the manufacturer for each batch of material produced (glass cullet or glass sand).
This reference procedure defines a method of analysis to determine the content of ceramic and inert materials, i.e. inorganic, non-metallic and non-glass, in glass sand. It is based on the results of an experimental project developed by the Stazione Sperimentale del Vetro (Experimental Glass Station) at the request of glassware producers of glass packaging and of CoReVe (the Glass Recovery Consortium). The method applies to glass sands, i.e. glass grains less than 1 mm in size. The method of analysis can be applied to glass grains from 1 mm to 5 mm in size.
Please note that the text you can find here as a PDF attachment is a non official English translation provided by FEVE (the European Container Glass Federation) in agreement with UNI – Ente Italiano di Normazione (Italian Standardisation Body). It is not an official UNI translation. The original text (in Italian) can be found on http://store.uni.com/catalogo/uni-pdr-31-2017”)