Get Sand & Types of Aggregate at the Best Price Online. We Supply Finely Graded River & Pit Sand, 12mm & 40 mm Fine Aggregate with Well-trusted Sellers Details.One of the main types of sand used in construction is river sand. It possesses the ideal properties for creating strong and durable concrete. The grains of river sand are well-rounded and possess good packing density, ensuring a solid matrix when mixed with cement. However, the excessive and unregulated extraction of river sand has raised environmental concerns, leading to the exploration of alternative sources like manufactured sand.A