An analysis study on the mineralogical characteristics and microstructural
Sarvesh Nandal, Er Hardik dhul
Sand is also mined from beaches and inland dunes and dredged from large scale removal of riverbed materials and dredging below the streambed alters the channel form and shape, that, in turn, has several consequences such as erosion of the riverbed and banks, increase in channel bed slope and changes in channel morphology. Removed sand is a direct loss to the river system. It causes deepening of rivers and estuaries and it also enlarges river mouths and coastal inlets, which may also lead to the saline-water intrusion from the nearby sea. It is also a threat to bridges, river banks and other nearby structures. River sand and gravel, concrete's main ingredients, are also straining to meet global demand. River sand and gravel supplies are dwindling quickly. According to a March 2014 UNEP study, "Sand-rarer than one believes," sand and gravel are currently the most commonly exploited natural resource after water. These are retrieved faster than they regenerate. Sand and gravel account for 68% to 85% of the 47 to 59 billion tonnes extracted annually globally. The globe uses 25.9 billion tonnes of aggregates for concrete. This paper analysis on the mineralogical characteristics of different structure.
Sarvesh Nandal, Er Hardik dhul. An analysis study on the mineralogical characteristics and microstructural. National Journal of Multidisciplinary Research and Development, Volume 7, Issue 2, 2022, Pages 6-8