Partly due to the European Union endeavours and specifications, the use of industrial by-products has been revived also in Hungary. Our former experience has shown that the majority of the furnace by-products is fully appropriate for road construction. The slag deposits (piles) of the former metallurgic plants (blast furnaces) constitute huge “landscape wounds” close to several cities, nevertheless, the use of this by-product has not spread widely. Several Hungarian technical directives specify the use of blast-furnace slag in roads ÚT 2-1.222:2002; ÚT 2-3.207:2003; ÚT 2-3.102). These specifications have been rendered more strict lately, partly justified, partly unjustified. Owing to a country-wide survey performed by the Institute for Transport Sciences (KTI), the main characteristics of domestic slag are known. A ministerial resolution related the tender announcement of the construction of the motorway M6 section between Érdi tetõ and Dunaújváros specified the use of the slag produced by Dunaújvárosi Vasmûvek (Dunaujvaros Iron Works) in the embankment. Detailed preparatory works were carried out before the building of slag into the embankment of the motorway, for the first time in Hungary. Then the experience gained were analysed, which was followed by the monitoring of an experimental section, and finally the application of slag started in the construction of the motorway M6. The main objectives of this diploma project were to analyse the experience obtained during the slag construction, the experience on the revision of the Road Technical Specification ÚT 2-1.222:2002 “The general rules of the geotechnical design of roads” which started in autumn 2005, the special quality problems of the built-in slag embankment and the requirements on this secondary material. The compilation of the qualification documentation of the motorway section containing slag embankment was also among my tasks. So, I had the possibility to analyse comprehensively the construction of the slag embankment in the motorway M6 and to draw conclusions for similar projects with the use of a huge quantity of slag in motorway embankment. (Author/publisher)
Abstract