WHY MSAND IS BETTER THAN RIVER SAND

WHAT IS M -SAND ?
M sand  refers to Manufactured sand , it is artificially made by crushing boulders  into VSI crusher called as vertical shaft impact crusher which is fed into rotopactor to crush aggregate into sand and finally screening to remove  below 75micron particles ,which is very fine particle which do not hold good characteristic (holds more water which is not good for concrete or plastering works)

The manufactured sand classified into 4 categories same as river sand zone1 zone 2 zone 3 and zone 4 sand .

zone 1 and zone 2 sand should be used for concrete ,zone 2 zone 3 zone4 should be used for plastering, zone 1 zone 2 can be used for brick work masonry works 

What is reliability of Msand in construction industry?

Many  infrastructure projects completed using completely Msand , i personally used Msand in underground and elevated metro projects in chennai.pune mumbai expressway completed using Msand 

My engineer /mason says Msand is not good alternative to river sand(mostly said in residential projects)?

This is because they have not used actual Msand ,they used crushed sand which is airblown /water blown. It is  crusher sand which is sold in the name of Msand .crusher sand has more 75 micron particle which takes more water and gives adverse effect in concrete and plastering works  (poor strength ,cracks etc)

I want to construct my home / residential apartments using Msand how can I assure that Msand is VSI made ?

most of the contractors sell crusher sand in the name of msand, vsi made msand is available in market, first take samples from manufacturers and give the samples to quality/material engineers who is experienced in this field they will do test the samples and tell you which Msand is suitable for construction 

Msand should be rounded  particle , if it flaky and elonagted  it is not made of VSI crusher it will take more water which leads to poor quality of concrete or plaster

Which is more durable material river sand or Msand and how?

The answer is blindly MSAND,the river sand has excessive silt ,coal, bone,mica,shells,clay and other organic materials which is detrimental to concrete as well as steel

Msand dont have silt and other organic impurities which will give better durability than river sand

V.SUDHAKAR BE,MBA,LLB,AMIE,FIV
CHARTERED AND PROFESSIONAL ENGINEER
QVR INFRA CONSTRUCTION (OPC) PVT LTD 
9444991031