Astm designation c 136 for fine aggregates
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This document describes a test method for determining the particle size distribution of fine aggregates through sieve analysis. The test involves drying a sample, sieving it using a nested set of sieves, weighing the material retained on each sieve, and calculating the percentages passing and retained to obtain the gradation. The results are used to determine compliance with specifications and provide data for controlling aggregate production and mixtures. The method is not applicable to materials finer than 75 microns.
Astm designation c 136 for fine aggregates
- 1. ASTM Designation: C 136 SIEVE ANALYSIS OF FINE AGGREGATES Engr. Muhammad Ahmad Rana USA
- 2. Scope This test method covers the determination of the particle size distribution of fine and coarse aggregates by sieving. Significance The obtained results are used to determine compliance of the particle size distribution with applicable specification requirements and to provide necessary data for control of the production of various aggregate products and mixtures containing aggregates. The data may also be useful in developing relationships concerning porosity and packing. Engr. Muhammad Ahmad Rana USA
- 3. Non-applicability This test is not applicable to materials finer than 75micron (No. 200) sieve. Apparatus • Balance • Set of Sieves • Mechanical Shaker • Oven Sample Sample weight = 500 g (Min. 300 g) Engr. Muhammad Ahmad Rana USA
- 4. Procedure Step 1: Dry the sample to a constant mass at a temperature of 110 degree centigrade. A +/- tolerance of 5 degree is acceptable. Step 2: Weigh the dry sample, the empty sieves and the pan. Step 3: Nest the sieves in order to of decreasing size of opening from top to bottom and place the pan at the bottom of the set. Step 4: Place the sample on the top sieve. Step 5: Place the lid and agitate the sieve in the mechanical shaker for 10 min. Step 6: Weigh the sieves with the material retained. Determine the weight retained in each sieve. The total weight of the material after sieving should check closely with the original weight of the sample. If the amount differ by more than 0.3 percent (based on the original weight), the results will be discarded. Engr. Muhammad Ahmad Rana USA
- 5. Procedure (Cont.) Step 7: Calculate the percentage coarser than and the percentage passing by following the EXAMPLE given in next slide. Step 8: Draw the gradation chart. Calculate the F.M. and average size of the particle. Engr. Muhammad Ahmad Rana USA
- 6. Engr. Muhammad Ahmad Rana USA
- 7. Grading Limits Engr. Muhammad Ahmad Rana USA
- 8. Engr. Muhammad Ahmad Rana USA