AIM:-
- TO Determine Of Material Finer Than 75μ of Coarse Aggregate IS-2386, (Part-1)
APPARATUS:-
- Weight Balance accuracy of 0.1%
- Sieve -75 μ IS: 460
- Container pan type
- Hot air Oven (temp. 110°C± 5°C)
SAMPLE PREPARATION:-
- The test sample shall be dried to constant 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 μ 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 75 micron is sieve shall be calculated.
