(April 2015) Corruption in Brazil exists on all levels of society from the top echelons of political power (as seen in the MensalÃ£o Scandal and the Operation Car Wash and the Petrobras scandals) to the smallest municipalities.
Quartz sands, which are high in silica content, are used to make glass. When quartz sands are crushed they produce particles with sharp, angular edges that are sometimes used to make sandpaper for smoothing wood. Some quartz sand is found in the form of sandstone.
exists and is an alternate of . The most common use of sand is in building materials. Sand is mixed with cement and water to make concrete. Sand is used in the manufacture of brick, glass and other materials, and it can also be used as a media for the filtration of water. Sand is also found as a landscaping material, and as an amendment for soil to change its characteristics.