M- Sand for construction purpose

M- Sand for construction purpose.

        Due to river sand scarcity and demand, now a days Manufacturing Sand (M- Sand) is widely used for construction purpose. any how main requirement of M- Sand is The ratio of fines below 600 microns in sand should not be less than 30%. mostly in Tamil contractors used the M- Sand in brick work and concrete purpose. for plastering they use river sand because of workability and high heat of hydration. 

Manufactured Sand should adhere to the highest standards and must undergo the following quality tests

1.    Sieve analysis
2.    Optical Microscopic Study to check the particle shape
3.    Workability (slump test by slump cone method)
4.    Cube test for compressive strength
5.    Tests for Silt and clay

IS 383- 1970 is used for above test. the sand is passed as per specification, the sand is used for construction purpose Fine aggregates manufactured sand proposed to be used shall be produced from a Vertical Shaft Impact (VSI) crushers and shall conform to the requirements of Zone-II (in most of the cases) as per IS 383-1970 particles finer than 75 µm shall not exceed 15 %. Special efforts on the part of M-sand manufacturers (such as washing of sand by water or dry washing by air) is required to restrict particles finer than 75 µm to 15%. The global trend is to utilize dry classification solutions to produce manufactured sand. The dry separation process separates fine and coarse particles. This allows a reduced percentage of super fines in manufactured sand, thereby meeting specifications and achieving quality products.

M-sand can also be used for making masonry mortar and shall conform to the requirements of IS 2116-1980 – “Specification of sand for Masonry mortars”.