AGGREGATE GRADATION TABLE - (METRIC)

 

 

Metric Sieve Size

 37.5 mm 25 mm 19 mm 12.5 mm 9.5 mm 4.75 mm 2.36 mm 600 µm 300 µm 150 µm 75 µm  
Grad.
No.		 Section No.

Intended Use

 Percent Passing Notes
1. 4110, 4125, 4133 PCC FA, Cover Agg.         100 90-100 70-100 10-60     0-1.5 1
3. 4115 (57, 2-8) PCC CA 100 95-100   25-60   0-10 0-5       0-1.5 2, 11
4. 4115 (2-8) PCC CA 100 50-100 30-100 20-75 5-55 0-10 0-5       0-1.5  11
5. 4115 (67, 2-8) PCC CA   100 90-100   20-55 0-10 0-5       0-1.5 11 
6. 4115.06 (Repair & Overlay) PCC CA      100 97-100 40-90 0-30           0-1.5 11
7. 4117 (Class V) PCC FA&CA 100          80-92 60-75 20-40         
8. 4117.03 (Class V) Fine Limestone           100  90-100           0-30  
10. 4120.02, 4120.03 (C gravel) Granular Surface      100     50-80 25-60           3, 12
11. 4120.02, 4120.04, 4120.05, 4120.07, A,B Cr.St.) Granular Surface & Shoulder   100 95-100 70-90   30-55 15-40        6-16 4, 5, 12
12a. 4121 (Cr. St.) Granular Subbase 100     40-80      5-25       0-6 6, 12
12b. 4121 (Cr. Gravel) Granular Subbase 100     50-80     10-30   5-15   3-7 7, 12
13. 4122.02 (Cr.St.) Mac. St. Base

75 mm nominal maximum size screened over 19 mm or 25 mm screen.

    
14. 4123 Modified Subbase 100   70-90       10-40         3-10 5, 7, 12
19. 4125 (12.5mm) (Cr.Gr. or Cr.St.) Cover Aggregate      100  97-100  40-90  0-30 0-15       0-2 12
20. 4125 (12.5mm) (Scr.Gr.) Cover Aggregate     100  95-100  40-80  0-15 0-7       0-1.5 12
21. 4125 (9.5 mm) Cover Aggregate       100  90-100 10-55 0-20 0-7     0-1.5 12
22. 4124.02B  Fine Slurry Mixture           100 85-100 40-95 20-60 14-35 10-25 5-25 10, 12
23. 4124.02B (Cr.St.) Coarse Slurry Mixture              100 70-90 45-70

40-70

 19-34

19-42

 12-25 7-18 5-15 12
29. 4131 Porous Backfill      100 95-100  50-100 0-50 0-8          12
30. 4132.02 (Cr.St.) Special Backfill 100           10-40        0-10 5, 12
31. 4132.03 (Gravel) Special Backfill    100 90-100  75-90     30-55        3-7 12
32. 4133 (Sand/Gr./Cr.St.) Granular Backfill

 100% passing the 76.2 mm screen.

 20-100       0-10 8, 9, 12
35. 4133.05 (Natural Sand/Gr.) Floodable Backfill 100           20-90       0-4 12
36. 4133.05 (Natural Sand) Floodable Backfill             100       0-2 12

Notes:    (Gradations No. 2, 9, 15, 16, 17, 18, 24, 25, 26, 27, 28, 33, and 34 have been deleted)

1. For Section 4110, when the fine aggregate is sieved through the following numbered sieves - 4.75 mm, 2.36 mm, 1.18 mm, 600 µm, 300 µm, and 150 µm - not more than 40% shall pass one sieve and be retained on the sieve with the next higher number.

2. When used in precast and prestressed concrete bridge beams, 100% shall pass the 25 mm sieve.

3. When compaction of material is a specification requirement, the minimum percent passing the 75 µm sieve is 6%.

4. See specifications for combination of gravel and limestone.

5. Unwashed air dried samples of crushed composite material shall be tested for gradation compliance except that no gradation determination will be made for material passing the 75 µm sieve.

6. The gradation requirement for the 2.36 µm sieve shall be 5% to 20% when recycled material is supplied.

7. For Section 4121 gravel, one fractured face on 30% or more of the particles retained on the 3/8 inch sieve. For Section 4123 gravel, one fractured face on 75% or more of the particles retained on the 3/8 sieve.

8. Crushed stone shall have 100% passing the 25 mm sieve.

9. When granular backfill is used in floodable applications, use gradation 35 or 36. When granular backfill is used under flowable mortar, one of the following alternative materials shall be used: natural sand compliant with Section 4110, except the % passing the No. 200 sieve shall not exceed 4%; gravel, crushed stone, or crushed concrete meeting the gradation requirements of Section 4121.

10. Gradation limitations for the 600 µm, 300 µm, and 150 µm sieves shall not apply when slurry mixture is applied by hand lutes such as for slurry leveling.

11. Maximum of 2.5% passing the No 200 sieve allowed if generated from the parent material when documented production is 1% or less ad determined by the Office of Materials.

12. When Producer gradation test results are used for acceptance, test results representing at least 90% of the material being produced shall be within the gradation limits and the average of all gradation results shall be within the gradations limits. Stockpiled material not meeting the criteria may, at the District Materials Engineer’s discretion, be resampled using Materials I.M. 301 procedures. One hundred percent of the stockpile quality control and verification test results shall be within the gradation limits.