Black, tarry stools. blood in urine or stools. cough or hoarseness. fever or chills. lower back or side pain. painful or difficult urination. pinpoint red spots on skin. unusual bleeding or bruising.
Builder's Sand. Builder's Sand, also known as Plasterer's, Mason, or Bricklayer's Sand is a finer grade sand with smaller particles. It's often mixed with water and cement to make mortar for laying bricks/blocks. Ï scale - 3 to 2. Size range - 125â250 Âµm (0.0049â0.010 in)
Crushed sandstone (as sand) is a common filling material in road construction and sand is a principal component of concrete. Pure quartz sand is a source of silica which is used to make glass, carborundum, and semiconductors. Some strong sandstones with sharp grains (gritstone) are good for grinding.