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2021. 4. 5. The cement quantity required will be less. Such sand will be more economical. Demand for manufactured fine aggregates for making concrete is increasing day by day as river sand cannot meet the rising demand of construction sector. Natural river sand takes millions of As the river sand is widely used in development industry, the interest for fine total is expanding quickly. Stream sand has been the most broadly utilized as fine total the world over and to take care of the demand has prompted different hurtful results, for example, increment in the profundity of the waterway bed, bringing down of the water table, and saltiness interruption into the waterways. However, the excessive mining of rive bed to meet the increasing demand for sand in the construction industry has lead to the ecological imbalance in the state. Now the sand available in the riverbed is very coarse and contains a very high percentage of silt and clay. The silt and the clay presence in the sand reduce the strength of the concrete 2021. 3. 30. A major market for river sand in Hong Kong invariably comes from the manufacture of cement and ready-mix concrete for private/public housing and retail projects, with demand averaging 120 kilotonnes per month over the past 10 years. The river or natural sand demands very less water. The moisture which is trapped between these particles serves good for various concrete purposes. A medium quality river sand consists of 5 to 20% of silt content in them. River sand since naturally 2017. 8. 24. demand for river sand in the construction industry has consequently increased due to the extensive use of concrete resulting in the reduction of sand sources and increase in price. The large scale depletion of natural sand sources creates also the environmental problem such as erosion and 2019. 11. 8. Mining sand to use in concrete and other industrial purposes is, if anything, even more destructive. Sand for construction is most often mined from rivers. Desert sand and river sand can be used in concrete, the using will depend on its particle size distribution, whether it falls in the grading limits for sand or not. Also the sand should be tested... 2021. 4. 4. River Sand is good for all construction activities like concrete production and plastering as it is well graded. As per the Indian Standard codes, sand used in preparation of concrete and in plastering should ideally confirm to IS-383 Zone-II. Refer the table to understand how Zone classification is 
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