Builders in India choose between river sand, manufactured sand (M-sand) and washed silica sand. All three are fine aggregate, and most natural sands are largely quartz, which is silica. The useful comparison is not the name but the grading, cleanliness and consistency of the material against the specification for your work.
The three common options
River sand is naturally rounded and has long been the default for concrete and plaster, but its supply is regulated in many states and quality varies by source. Manufactured sand is produced by crushing rock, which gives angular particles and a controllable grading. Washed silica sand is natural sand that has been washed to remove clay and silt and then graded.
None of these is automatically right for every job. A sand is suitable when it meets the grading and quality requirements for the concrete, mortar or plaster you are making.
IS 383 grading zones for fine aggregate
In India, IS 383 sets the requirements for aggregate used in concrete. It places fine aggregate into four grading zones, from Zone I, the coarsest, to Zone IV, the finest. The percentage passing the 600 µm sieve decides the zone: about 15 to 34 percent for Zone I, 35 to 59 percent for Zone II, 60 to 79 percent for Zone III and 80 to 100 percent for Zone IV.
The standard advises against using Zone IV sand in reinforced concrete unless mix trials show it is suitable. As sand gets finer, the proportion of sand to coarse aggregate in the mix is usually reduced. Ask for a sieve analysis so you know which zone a material falls into.
Silt, clay and other impurities
Clay, silt and organic matter weaken the bond between cement paste and aggregate and increase water demand. IS 383 limits these deleterious materials. Washing removes most clay and silt, which is why washed sand is preferred where a clean, consistent aggregate is needed.
A simple silt test on site can flag a problem, but rely on laboratory results for structural work.
Matching sand to the job
Concrete benefits from a well graded sand that fills the voids between the coarse aggregate. Plaster generally calls for a finer, clean sand that gives a smooth, workable finish. Masonry mortar sits between the two. Your structural engineer or the project specification sets the actual requirement.
Consistency between deliveries matters as much as the grade itself, because a change in grading changes the mix. For larger projects, agree the grading and delivery quantities in advance.
What to ask before buying construction sand
Our construction sand is washed on site and graded. Send these details and our team will confirm the grading and supply.
- Use: concrete, plaster, masonry or a specific mix
- Required IS 383 zone or grading limits
- Silt and clay limit, if specified
- Quantity in tonnes and delivery schedule
- Site location, PIN code and unloading access
- Sieve analysis or test report requirements
Explore the relevant grades
Request a silica sand quote with your specification, quantity and delivery location, or contact our team.