Austria Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Belgium was US$445.94 Thousand during 2022, according to the United Nations COMTRADE database on international trade. Austria Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Belgium - data, historical chart and statistics - was last updated on May of 2024.