Control the grading of Type A Fine Aggregate so the fineness modulus of at least nine out of ten consecutive test samples from a single source delivered to a project or plant varies less than ± 0.20 from the average fineness modulus of the consecutive test samples. Determine the fineness modulus according to PTM No. 501. For asphalt mixtures:
• If directed, vary the gradations within the limits according to Table A.
• A blend of fine aggregates may be used if the proposed gradation limits for blending are approved by the District Executive in writing.
• If filler is required, provide fine aggregate conforming to the gradation according to Table A and use cement, cement dust, fly ash, or fines from the crushing of stone, gravel, or slag reasonably free of clay.
No. 100.
only) according to AASHTO T 21. If the color value result is greater than Organic Plate No. 3, determine the minimum strength ratio according to AASHTO T 71 and use fine aggregate meeting the strength ratio according to Table A .
a sodium sulfate solution according to PTM No. 510 .
TABLE A Fine Aggregate Grading and Quality Requirements
Cement Concrete Sand Asphalt Concrete Sand Type B Mortar Sand Sieve Size Type A #1 #3 Filler Type C 9.5 mm (3/8 -inch) 100 100 100 — — 4.75 mm (No. 4) 95-100 95- 100 80- 100 — 100 2.36 mm (No. 8) 70-100 70- 100 65- 100 — 95-100 1.18 mm (No. 16) 45-85 40-80 40-80 — — 600 µm (No. 30) 25-65 20-65 20-65 100 — 300 µm (No. 50) 10-30 7-40 7-40 95-100 — 150 µm (No. 100) 0-10 2-20 2-20 90-100 0-25 75 µm (No. 200) — 0-10 0-10 70-100 0-10 Material Finer Than 75 µm (No. 200) Sieve Max. Percent Passing 3 — — — — Strength Ratio Min. Percent 95 — — — 95 Soundness Test Max. Loss Percent 10 15 15 — 10 Fineness Modulus 2.30-3.15 — — — 1.6-2.5 703.2 703.2( a)
703.2COARSE AGGREGATE —
free from clay, silt, vegetation, and other deleterious substances such as reactive chert, gypsum, iron sulfide, amorphous silica, and hydrated iron oxide. Substances present in amounts large enough to cause inconsistent performance in asphalt concrete or plastic or hardened Portland cement concrete are considered deleterious. The LTS w