Studio su alcune caratteristiche dei materiali per ballast, con particolare riferimento alla composizione granulometrica ed all'uso di scorie siderurgiche

The definition of the quality characteristics of ballast materials today represents a research theme of great importance, due, on the one hand, to the necessity of obtaining high-speed lines and, on the other, to the attempt to reduce the costs of raw material supplies. After examining the present state of experimentation in the sector, the article reports on a series of laboratory tests carried out on several materials. The conclusion drawn that also for ballast the necessity arises for the introduction of a granulometric spindle. An initial proposal in this sense, is made. An evaluation is made of the characteristics of blast-furnace slag, in view of the economic interest for the latter in the areas in the vicinity of steelworks.