How to clean my sand of silt for construction - QuoraYou could try screening it. Or washing it. The matter of what to do with the fines is a problem you will have to deal with. A settlement dam might do the trick, however. Remember that concrete is not meant to set or harden by “drying”. You want th.how to wash sand for construction,How sand is made - material, manufacture, making, history, used .The production of sand for construction purposes grew significantly with the push for paved roads during World War I and through the 1920s. The housing boom of the . The preparation of sand consists of five basic processes: natural decomposition, extraction, sorting, washing, and in some cases crushing. The first process.