Journal Of Engineering Research Concrete Ceramic
Crushed stone is produced by crushing quarry rock, boul ders, cobbles, or large size gravel. Crushed air cooled blast furnace slag is also used as fine or coarse aggregate. The aggregates are usually washed and graded at the pit or plant. Some variation in the type, quality, cleanli ness, grading, moisture content, and other properties is expected.On wet roads a sufficiently rough surface texture on the macroscale is necessary to ensure rapid removal of water from the contact zone between the tire and road surface, especially at high speeds. For this surface texture on the macroscale, beside the particle size of the aggregate also the resistance to crushing and abrasion is rather important. The macroroughness is likely to decrease.