The river sand was the cheapest natural resources widely used in the construction field. However due to the dense population and rapid development, populace tent to extract massive quantity of sand from river bed to meet their increasing demand. This tendency leads to scarcity, dearness and ecological imbalance as well. Now the sand available in the riverbed is very contaminated and contains very high percentage of silt and clay. The silt and the clay presence in the sand reduce the strength of the concrete and holds dampness. Sand merchants could not fulfill the requirement of river sand to the construction field and thus they explore the viability for adulteration of saline sea sand. It raised serious concern among builders.
Aforesaid instances warranted for production of Manufactured Sand to meet the requirement of construction industry. It has many advantages compared to the river sand. As it’s molecules are cubical shape and thus induce surface force among them and it makes more compressive strength in concrete. Also, it forms brick like bedding while using vibrators promising cohesive force. It is pure intrinsic and contains no foreign elements. Corrosive elements like salt, phosphorus and chloride are not ingredient in the instant material. Whereas, the natural river sand is the product of sedimentation like mica, coal, fossils, limequick and other organic and inorganic impurities are present. Thus it reduces compressive strength. In the present scenario it is felt Manufactured Sand industry has a bright future
The fine aggregates are manufactured as per IS, BS, ASTM Standards. The superior shape, proper gradation of fines, smooth surface texture and consistency in production parameter of chemically stable sands provide greater durability and higher strength to concrete by overcoming the deficiencies like segregation, bleeding, honey combing, voids and capillary. Manufactured sand has the cubical shape with grounded edge and superior gradation gives good plasticity to mortar providing excellent workability.
Reena Rock Sand is located at Reena Industrial Estate, Velliyamparamba, Mattanur, Kannur. This unit manufactures sand from granite rocks in a special designed wire mesh of VSI by double washing in pure water without silt or slag. It produce two types of sand one for concrete as little coarse as per it’s specification and another is more smoother for plastering. The sand is named as “Reena Rock Sand” and it caught popularity among the builders in this region and northern Karnataka region within a short span. The rock is pure black in colour and as per prescribed specification as tested in Govt Polytechnic Lab. This sand is approved by Govt Engineers for various Govt works as KWA, PWD and Sports Ministry and company regularly supplying the sand to them.
