TEST PROCEDURE: 1. Dry the aggregate test sample to a constant weight at a temperature of 110 ± 5°C, then cool to room temperature. 2. Select suitable sieve sizes to furnish the information required by the specifications covering the material to be tested. Common sieves in millimeters are 37.5, 25, 19, 12.5, 9.5, 4.75, 2.36, 1.18, 0.6, 0.3, 0.15, and 0.075 mm (11 2 in., 1 in., 3 4 in., 1 2 in., 3 8 in., No. 4, No. 8, No. 16, No. 30, No. 50, No. 100, and No. 200). 3. Nest the sieves in order of decreasing size of opening, and place the aggregate sample on the top sieve. 4. Agitate the sieves by hand or by mechanical apparatus for a sufficient period. The criterion for sieving time is that, after completion, not more than 1% of the residue on any individual sieve will pass that sieve during 1 minute of continuous hand sieving. 5. Determine the weight of each size increment. 6. The total weight of the material after sieving should be compared with the original weight of the sample placed on the sieves. If the amounts differ by more than 0.3%, based on the original dry sample weight, the results should not be used for acceptance purposes. FOR THE TABLE: Compute individual percent retained, cumulative percent retained and percent passing. Make a particle size distribution chart using semi log using excel. Compute the fineness modulus of the sample. Identify whether weight percent within the governing specs passed.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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TEST PROCEDURE:

1. Dry the aggregate test sample to a constant weight at a temperature of 110 ± 5°C, then cool to room temperature.

2. Select suitable sieve sizes to furnish the information required by the specifications covering the material to be tested. Common sieves in millimeters are 37.5, 25, 19, 12.5, 9.5, 4.75, 2.36, 1.18, 0.6, 0.3, 0.15, and 0.075 mm (11 2 in., 1 in., 3 4 in., 1 2 in., 3 8 in., No. 4, No. 8, No. 16, No. 30, No. 50, No. 100, and No. 200).

3. Nest the sieves in order of decreasing size of opening, and place the aggregate sample on the top sieve.

4. Agitate the sieves by hand or by mechanical apparatus for a sufficient period. The criterion for sieving time is that, after completion, not more than 1% of the residue on any individual sieve will pass that sieve during 1 minute of continuous hand sieving.

5. Determine the weight of each size increment.

6. The total weight of the material after sieving should be compared with the original weight of the sample placed on the sieves. If the amounts differ by more than 0.3%, based on the original dry sample weight, the results should not be used for acceptance purposes.

FOR THE TABLE:

Compute individual percent retained, cumulative percent retained and percent passing.
Make a particle size distribution chart using semi log using excel.
Compute the fineness modulus of the sample.
Identify whether weight percent within the governing specs passed.

Minimum Mass, kg
Fine aggregate with at least 95% passing 2.36-mm (No. 8) sieve
0.1
Fine aggregate with at least 85% passing 4.75-mm (No. 4) sieve
0.5
Coarse aggregate with a nominal maximum size of 9.5 mm (No. 3/8 in.)
1
Coarse aggregate of a nominal maximum size of 12.5 mm (1/2 in.)
Coarse aggregate of a nominal maximum size of 19.0 mm (3/4 in.)
Coarse aggregate of a nominal maximum size of 25.0 mm (1 in.)
10
Coarse aggregate of a nominal maximum size of 37.5 mm (1-1/2 in.)
15

田
Laboratory
No.
CE141L-ASTMC136-1
Weight of Sample:
Original
5255
Moisture Content. %
5.21
Oven Dry
Wash Oven
Fineness Modulus
Dry
Percent
Cumulative
Weight
Retained,
Governing
Specs %
Passing
Sieve Size
Retained,
Weight
Percent
Percent
Remarks
(mm)
passing,e
Passing Retained
75
63
50
168
37.5
1880
25
963
19
1072
12.5
387
9.5
6.3
No. 4.75
450
No. 2.36
No. 2.0
No. 1.18
No.0.600
No.0425
No. 0.300
No.0.250
No.0.150
No.0.075
38
Pan
25
Wash Passing
No. 0.075
12
ТОTAL
4995

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