144(i) Asphalt Mix Design Technician: An Asphalt Mix Design Technician is responsible for designing and adjusting asphalt mixes as needed, reviewing and approving all test results, having direct communication with the asphalt plant for making recommended adjustments and is capable of conducting any tests necessary to put the asphalt plant into operation.
j.Aggregate Properties Technician: An Aggregate Properties Technician conducts all aggregate tests on aggregate used in asphalt concrete and verify conformance to applicable requirements.
k.Slurry Surfacing Technician: A Slurry Surfacing Technician inspects the placement of emulsified asphalt slurry seal and latex modified emulsion treatment (Micro-surfacing) and verify conformance with applicable requirements.
l.Surface Treatment Technician: A Surface Treatment Technician inspects the placement of single seal and modified (blotted) seal coats to ensure and verify conformance to applicable requirements. SECTION 201—MINERAL FILLER
201.01 Description
These specifications cover inorganic material such as lime or fly ash, usually of very fine grading, added to soil or asphalt to produce a desired effect.
201.02 Detail Requirements
Mineral filler shall conform to the requirements of AASHTO M17. Tests to verify conformance will be performed in accordance with AASHTO T37. 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 145202.03—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 Fine Aggregate 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. 25202.03 146TABLE II-2 Soundness Max . Soundness Loss (%) Magnesium Sulphate Freeze and Thaw Use (5 Cycles) (100 Cycles) Hydraulic cement concrete 18 8 Asphalt concrete surfaces and surface treatments 25 15 Asphalt concrete bases 30 15 SECTION 203—COARSE AGGREGATE
203.01 Description
These specifications cover material used as coarse aggregate in the production of hydraulic cement concrete, asphalt concrete, asphalt surface treatments, and in drainage.
203.02 Materials
Coarse aggregate shall consist of crushed stone, crushed slag, crushed or uncrushed gravel with clean, hard, tough, and durable pieces free from adherent coatings and deleterious amounts of friable, thin, elongated, or laminated pieces; soluble salts; or organic materials.
a.Crushed hydraulic cement concrete will be permitted for use as a coarse aggregate provided it conforms to the physical requirements specified herein and shows no adverse chemical reaction. Crushed hydraulic cement concrete will not be permitted in the following: (1) reinforced cement concrete, (2) in combination with other materials in contact with geotextile fabric when such fabric is used as a drainage item, and (3) in backfill or bedding for perforated pipe.
b.Crushed gravel shall consist of particles of which at least 80 percent by weight shall have at least one face fractured by artificial crushing. Tests to verify conformance shall be performed in accor - dance with VTM-15.
c.Blast furnace slag shall be relatively free from foreign minerals and glassy or spongy pieces. It shall weigh at least 70 pounds per cubic foot, dry rodded, for size No. 68 and smaller and at least 65 pounds per cubic foot, dry rodded, for larger sizes. Tests to verify conformance shall be performed in accordance with AASHTO T19. When used in asphalt surface treatments, blast furnace slag shall contain not more than 10 percent nonporous material and shall have an absorption of at least 3 percent. Tests to verify conformance will be performed in accordance with AASHTO T85.
d.Crushed glass shall consist of particles of curbside-collected or waste glass. It shall be free from sources of glass that include automotive glass, lead crystal, TV monitors, lighting fixtures and electronics applications. Non-glassy material associated with curbside collection (paper, capping materials, etc.), excluding fragments of broken ceramics and pottery, shall be limited to 5 percent by weight using a gravimetric determination, and including loss on ignition performed in accordance with ASTM D2974. One hundred percent (100%) of the crushed glass shall pass the 9.5 mm (3/8 inch) sieve with less than 5 percent passing the No. 200 sieve. Crushed glass shall not be used in hydraulic cement concrete, asphalt, base/subbase, or exposed shoulder applications.202.03
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 172–173 of 1,065.