SECTION 202—FINE AGGREGATE
202.01 Description
These specifications cover material for use as fine aggregate in the production of hydraulic cement con - crete, mortar, asphalt concrete, and asphalt surface treatments.
202.02 Materials
Fine aggregate is classified herein in according to its natural occurrence or method of manufacture as natural sand or stone sand. Natural sand shall consist of grains of hard, sound material, predominantly quartz, occurring in natural deposits or in loosely bound deposits, such as sandstone conglomerate. Stone sand shall consist of sound crushed particles of approved Grade A stone, essentially free from flat or elongated pieces, with sharp edges and corners removed. Fine aggregates for use in hydraulic cement concrete that are obtained from more than one source shall not be used alternately or mixed without the Engineer’ s approval. 200.06
202.03 Detail Requirements
a.Grading: Grading shall conform to the requirements of Table II-1. Tests to verify conformity shall be performed according to the requirements of AASHTO T27.
b.Soundness: Soundness shall conform to the requirements of Table II-2. Tests to verify conformity shall be performed according to the requirements of AASHTO T103 or T104.
c.Organic Impurities: When fine aggregate is to be used in hydraulic cement concrete, the percentage of organic impurities shall conform to the requirements of AASHTO T21; however, material pro - ducing a darker color than that specified in AASHTO T21 may be accepted in accordance with AASHTO M6.
d.Void Content: V oid content shall be tested to verify conformity according to the requirements of VTM-5.
e.Deleterious Material: The amount of deleterious material in sands shall be not more than the following: AASHTO Material % by Weight Test Method Clay lumps 0.25 T112 Shale, mica, coated grains, soft or flaky particles 1.0 T113 Organic material 0 T21 Total material passing No. 200 sieve by washing1,2 T11 and T27 For use in concrete subject to abrasion 3 For other concrete 5 1In the case of stone sand, if the material passing the No. 200 sieve is dust of fracture, essentially free from clay and shale, the percentages shown for use in concrete subject to abrasion and in other concrete may be increased to 5.0 percent and 7.0 percent, respectively. 2In the case of blends of stone sand and natural sand, provided the natural sand contains no greater than 3% passing the No. 200 sieve for use in concrete subject to abrasion and no greater than 5% for other concrete, then the stone sand limits of 5% and 7% shall apply to the blend. TABLE II-1 Amounts Finer Than Each Laboratory Sieve (Square Opening) (% by Weight) Grading 3/8 in. No. 4 No. 8 No. 16 No. 30 No. 50 No. 100 No. 200 A Min. 100 95-100 80-100 50-85 25-60 5-30 Max. 10 B Min. 100 94-100 Max. 10 C Min. 100 94-100 Max. 25 202.03
Referenced in this section
Fine Aggregate in other states
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Source: Road and Bridge Specifications, 2020 Edition. Pages 172–173 of 1,065. View official source ↗