Zambia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Congo was US$11.43 Thousand during 2017, according to the United Nations COMTRADE database on international trade. Zambia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Congo - data, historical chart and statistics - was last updated on May of 2024.