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Original scientific paper

DISPOSAL OF NON-METALIC COMPONENTS OF PRINTED CIRCUIT BOARDS

Aleksandra Anić Vučinić orcid id orcid.org/0000-0001-9257-0198 ; Faculty of Geotechnical Engineering, University of Zagreb, Varaždin, Croatia
Dinko Vujević ; Faculty of Geotechnical Engineering, University of Zagreb, Varaždin, Croatia
Vitomir Premur ; Faculty of Geotechnical Engineering, University of Zagreb, Varaždin, Croatia
Ivana Melnjak orcid id orcid.org/0000-0003-2296-1059 ; Faculty of Geotechnical Engineering, University of Zagreb, Varaždin, Croatia
Dario Canjuga ; Faculty of Geotechnical Engineering, University of Zagreb, Varaždin, Croatia


Full text: croatian pdf 3.683 Kb

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Abstract

Printed circuit boards (PCB) represent 3 to 5% by weight of WEEE and are also its most complex part with the most valuable and the most dangerous components at the same time. Recycling technology of PCBs is adopted in order to exploit valuable materials, but due to the process complexity, technology is limited in application. Approximately 70% by weight of PCBs is non-metal fraction (NMF) which includes plastic, ceramics, glass and similar materials without market value. It is estimated that in Republic of Croatia arises between 350 and 600 tons of NMF on annual basis. Due to its composition and content of hazardous components NMF is hazardous waste that is mostly disposed in undeveloped countries, while developed countries incinerate it at significant costs.
This paper deals with investigation of procedures which use NMF as raw material in concrete production. With a brief overview on disposal of PCBs and NMF, in this paper also is given overview on current experiences in disposal of NMF by encapsulation in concrete or cement. The paper presents the results of laboratory studies on strength of concrete with NMF as filler. In the studies 5% of mineral aggregate was substituted with NMF of different granulation and was tested on compressive strength of cubes aged 7 and 28 days. Based on the obtained results, guidance for continuation of studies with the aim of using NMF as raw material is given.
Encapsulation efficiency of the harmful substances was determined by testing the leachate in the standard conditions.

Keywords

printed circuit boards, non-metal fraction, concrete

Hrčak ID:

132727

URI

https://hrcak.srce.hr/132727

Article data in other languages: croatian

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