Mechanical Strength and Microstructure Properties of Concrete Incorporating Copper Slag as Fine Aggregate: A State-of-the-Art Review

Table 1

Top five (5) worldwide importers of gravel, stone, and sand [22].

Trade price (2010–2014) ($)	Top importers
13,621,826,061	China
2,946,963,029	Netherlands
2,825,197,760	Singapore
2,755,605,436	Germany
2,695,719,208	India
35,127,603,231	Others
59,972,914,725	Total

Selected classification. SITC Rev. 1; selected commodities: 273 (stone, sand, and gravel); selected reporters: all; selected years: 2010, 2011, 2012, 2013, and 2014.