7-11 Aggregate Gradation Control Points Nominal Maximum Aggregate Size---Control Points (Percent Passin g) Sieve Designation Type 25 mm Type 19 mm Type 12.5 mm Type 9.5 mm Type 9.5 mm Thin Lift Mixture (TLM) Type 4.75 mm Percent By Weight Passing - Combined Aggregate 37.5 mm 100 25 mm 90-100 100 19 mm -90 90-100 100 12.5 mm - -90 90-100 100 100 100 9.5 mm - - -90 90-100 95-100 95-100 4.75 mm - - - -90 60-95 80-100 2.36 mm 19-45 23-49 28-58 32-67 47-65 40 - 80 1.18 mm - - - - - - 0.60 mm - - - - - - 0.30 mm - - - - - - 0.075 mm 2.0-6.0 2.0-6.0 2.0-6.0 2.0-7.0* 2.0-7.0* 2.0-7.0 * For 9.5 mm nominal maximum aggregate size mixtures, the maxim um design aim for the percent passing the 75 μm sieve is 6.5%.
703.10 Aggregate for Untreated Surface Course and Leveling Cour se Aggregate for
untreated surface course and leveling course shall be screened or crushed gravel consisting of hard durable particles which are free from vegetable matter, lumps or balls of clay and other deleterious substances. If this item is to be used under neath pavement, it must have a Micro-Deval value of 20.0 or less as determined by AASHTO T 32 7. If the Micro-Deval value exceeds 20.0, the material may be used if it does not exc eed 25 percent loss on AASHTO T 96, Resistance to Degradation of Small-Size Coarse Agg regate by Abrasion and Impact in the Los Angeles Machine. The aggregate shall meet the grading requirements of the following table: Sieve Designation Percentage by Weight Passing Square Mesh Sieves Untreated Aggregate Surface Course Type A Type B 1 inch 95-100 95-100 ¾ inch 90-100 90-100 No. 4 40-65 10-45 No. 10 10-45 10-35 No. 200 0-7.0 0-6.0 7-12
703.11 Aggregate for Shoulder T he gradation of that portion pa ssing a 3 inch sieve shall
meet the gradation requirements of the following table: Sieve Designation Percentage by Weight Passing Square Mesh Sieves *Paved or Unpaved Lifts 4 inches or Greater Paved Lifts < 4 inches Unpaved Lifts < 4 inches 1 inch - 90-100 90-100 ¼ inch 25-70 25-100 25-70 No. 40 5-30 5-50 5-30 No. 200 2.0-10.0 2.0-10.0 2.0-10.0 *Shall not contain particles larger than 6 inches or the thickn ess of the lift being placed, whichever is less.
703.12 Aggregate for Crushed Stone Surface Crushed stone surf ace shall be of
quarried stone and have a Micro-Deval value of 18.0 percent or less as determined by AASHTO T 327. The aggregate shall meet the grading requirement s of the following table: Sieve Designation Percentage by Weight Passing Square Mesh Sieves 1 inch 100 ¾ inch 60-90 ½ inch 10-35 ⅜ inch 2-15 No. 4 0-5
703.13 Crushed Stone ¾-Inch Aggregate for Crushed Stone ¾-inc h shall
be of quarried stone and have a Micro-Deval value of 18.0 perce nt or less as determined by AASHTO T 327. The aggregate shall meet the grading requirem ents of the following table: Sieve Designation Percentage by Weight Passing Square Mesh Sieves 1 inch 100 ¾ inch 90-100 ½ inch 20-55 ⅜ inch 0-15 No. 4 0-5
703.15 Filler These materials shall conform to the following s pecification requirements
for the designated materials.