3127Fine Aggregate for Bituminous Seal Coat

3127.1SCOPE

Provide fine Aggregate for use in bituminous seal coat.

3127.2REQUIREMENTS

A Composition Provide Aggregate for use in bituminous seal coat meeting the following requirements:

3139.2A.2, ”Classification”

B Gradation and Quality Provide fine Aggregate for bituminous seal coat meeting the following gradation requirements: Table 3127.2-1 Fine Aggregate for Bituminous Seal Coat, Percent Passing by Weight and QA Tolerances Sieve Size FA-1 FA-2 FA-2 1/2 FA-3 FA-3 1/2 Job Mix Formula QA Tolerance percent 1/2 inch — — — — 100 — 3/8 inch — — 100 100 90 – 100 ± 5 1/4 inch 100 100 0 – 80 0 – 70 0 – 70 ± 7 No. 4 0 – 100 0 – 100 0 – 50 0 – 25 0 – 25 ± 7 No. 8 — 0 – 40 0 – 12 0 – 5 0 – 5 ± 4 No. 16 0 – 30 0 – 10 0 – 5 — — ± 4 No. 50 0 – 15 0 – 5 — — — ± 4 No. 100 0 – 5 — — — — ± 4 No. 200 0.0 – 1.0 0.0 – 1.0 0.0 – 1.0 0.0 – 1.0 0.0 – 1.0 —

Provide fine Aggregate for bituminous seal coat meeting the following quality test requirements:

Table 3127.2-2 Fine Aggregate Durability for Bituminous Seal Coat Meeting the Requirements of AASHTO T96 Modified by MnDOT Material Tests FA-1 FA-2 FA-2 1/2 FA-3 FA-3 1/2 Shale, percent ≤ 5 ≤ 5 ≤ 5 ≤ 3 ≤ 2 Flakiness index, percent * — ≤ 25 ≤ 25 ≤ 25 ≤ 25 One Face Crush, percent ǁ ≥ 80 ≥ 80 ≥ 80 ≥ 80 ≥ 80 Insoluble residue for the portion of quarried Carbonate Aggregates passing the No. 200 Sieve, percent ≤ 10 ≤ 10 ≤ 10 ≤ 10 ≤ 10 Los Angeles Rattler, percent loss — — — ≤ 35 ≤ 35 Bulk Specific Gravity Required for Mix Design Submittal and verification. Verification tolerances between the Contractor and Department are 0.040 percent for Bulk Specific Gravity, 8 pounds per cubic foot for Loose Weight of Aggregate and 0.5 percent for Absorption. Loose Weight of Aggregate Absorption * Test Aggregate retained on each Sieve, if weight of retained Aggregate comprises at least 4 percent of the total sample weight. ǁ For Class C Aggregates only.

3127.3SAMPLING AND TESTING

Report the No. 200 Sieve results to the nearest 0.1 percent and all other Sieve results to the nearest 1 percent. A Sampling & Sieve Analysis .............................................................................. Laboratory Manual A.1 Coarse Sieve Analysis ................................................................................. Method 1202 A.2 Fine Sieve Analysis ..................................................................................... Method 1203 B Flakiness Index ......................................................................... Laboratory Manual Method 1223 C Lithological Count .................................................................... Laboratory Manual Method 1209 D Los Angeles Rattler .................................................................. Laboratory Manual Method 1210 E Percent Crushed Particles ......................................................... Laboratory Manual Method 1214 F Loose Weight of Aggregate .......................................... MN Seal Coat Handbook MN/RC-2006-34 G Specific Gravity and Absorption (-4) ......................................... Laboratory Manual Method 1205 H Insoluble Residue ..................................................................... Laboratory Manual Method 1221 I Specific Gravity and Absorption (+4) ........................................ Laboratory Manual Method 1204