19 Sand; Limestone; Concrete; Crushed Concrete; Asphalt; Recycled asphalt; Aggregate material composed of sand, water and cement for use in highway and road construction, building construction, bridge construction, water, sewer and drainage construction; Aggregate material composed of crushed concrete and dirt for use in highway and road construction, building construction, bridge construction, water, sewer and drainage construction; Aggregate material composed of limestone and crushed concrete for use in highway and road construction, building construction, bridge construction, water, sewer and drainage construction; Aggregate material composed of gravel for use in highway and road construction, building construction, bridge construction, water, sewer and drainage construction