WHAT IS THE GRADING LIMIT OF SAND FOR PLASTER WORK?

The sand used for plaster work can be natural sand, crushed stone sand or crushed gravel sand. grading range of sand for plaster work; For interior and exterior wall and ceiling should be given in the table below.

Table of Contents

Grading range of sand for plaster work

sieve size is	pass percentage
10 mm	100
4.75 mm	95 – 100
2.36 mm	95 – 100
1.18 mm	90 – 100
600 micron	80 – 100
300 micron	20 – 65
100 micron	0 – 15

notes to remember

If the grading falls outside the limits of the grading zone of the sieve (except 150, 300 and 600 micron IS sieve), the aggregate amount does not exceed 5%, it will be considered to be under gradation.
For crushed stone sand and crushed gravel sand, the permissible limit on 150 micron IS sieve has been increased to 20%.
The fineness modulus of sand should be as per the following table.

sand type	fineness modulus
crushed stone sand	1.4. not less than
crushed gravel sand	1.4. not less than
natural sand	1.5. not less than

Reference

IS:1542-1992 – Sand for plaster – Specification