AIM:-
- Determination Of Material Finer Than 75μ Of fine Aggregate
- As Per IS:2386 (Part- 1)
APPARATUS:-
- WT Balance
- IS sieve -75μ
- Upper 1.18 mm (sieve-IS-460)
- Container pan type
- Hot Air Oven (temp. 110⁰C ± 5)
- SAMPLE IS:2430
PROCEDURE:-
- The test sample shall be dried to content weight at a temperature of 110°c ± 5 and weight the nearest 0.1 percent.
- The test sample after being dried and weight shall be placed in the container and sufficient water added to cover it. the contents of the container shall be agitated vigorously.
- The agitation shall be sufficiently vigorous to result in the complete separation from the coarse particle of all particle finer than 75 u and bring the fine material into suspension.
- Care shall be taken to avoid as much as possible,the decantation of the coarse particle of the sample, the operation shall be repeated until the wash water is clear.
- The wash water containing the suspended and dissolved solids shall be immediately poured over the nested sieves arranged with the coarse sieve on the top.
- All the material retained on the nested sieve shall be returned to the washed sample the washed aggregate shall be dried to the constant weight at a temperature not exceeding 110 °c and weight to the nearest 0.1 percent.
CALCULATIONS:-
- The amount of material passing the is sieve Shall be calculated as-
- Natural Sand not more than 3% & Crusher Sand not more than 15% & Manufacturing Sand not more than 10%.