150205.02
b.Crushed gravel shall consist of particles of which at least 90 percent by weight of material retained on the No. 10 sieve shall have at least one face fractured by artificial crushing. Tests to verify accep - tance shall be performed in accordance with VTM-15.
c.Crushed glass will be permitted for use as crusher run aggregate provided it conforms to the physical requirements of Section 203.02(d). Crushed glass having the gradation specified in Section 203.02(d) may be directly substituted for size No. 25 and 26 aggregates in pipe bedding and back - filling applications only.
205.03 Detail Requirements
a.Grading: Grading shall conform to the following requirements when tested in accordance with AASHTO T27: % by Weight of Materials Passing Sieve Size No . 2½ in 2 in 1½ in 1 in ¾ in No. 4 24 Min. 100 95±5 32±18 25 Min. 100 95±5 32±18 26 Min. 100 95±5 38±22
b.Atterberg Limits: The liquid limit shall be not more than 25. The plasticity index shall be not more than 3. Tests to verify acceptance shall be performed in accordance with VTM-7.
c.Soundness: Soundness shall conform to the requirements of Table II-4. Tests to acceptance shall be performed in accordance with AASHTO T103 or T104. The requirement for soundness test for crushed glass is waived due to its preclusion from the applications shown in Table II-4.
d.Abrasion Loss: Abrasion loss shall be not more than 45 percent. Tests to verify acceptance shall be performed in accordance with AASHTO T96.
e.Flat and Elongated Particles: Crusher run aggregate to be used as a temporary riding surface during construction activities or as the final riding surface after construction shall contain not more than 30 percent by mass of aggregate particles retained on and above the 3/8-inch sieve having a maximum to minimum dimensional ratio greater than 5 as determined in accordance with ASTM D4791. SECTION 206—LIGHTWEIGHT AGGREGATE
206.01 Description
These specifications cover lightweight aggregate used in the production of hydraulic cement concrete and asphalt surface treatment.
206.02 Detail Requirements
Lightweight aggregate shall consist of clay, shale, or slate expanded through a sintering or rotary kiln. 151(a) Lightweight aggregate used in hydraulic cement concrete shall conform to AASHTO M195.
b.Lightweight aggregate used for asphalt surface treatment shall conform to AASHTO M195 except that Sections 3, 6, and 8 will not apply. Grading shall conform to Table II-3 except that the maximum percentage by weight of material passing the No. 8 sieve shall be 16 percent and passing the No. 16 sieve shall be 9 percent. SECTION 207—SELECT MATERIAL
207.01 Description
These specifications cover nonplastic material obtained from roadway cuts, borrow areas, or commercial sources used as foundation for subbase, shoulder surfacing, fill, backfill, or other specific purposes.
207.02 Detail Requirements
Select material shall consist of approved local or commercial materials free from roots, muck, and debris.
a.Grading:
1.Type I: Grading for Type I shall conform to the job-mix formula selected from within the design range specified in Table II-6, subject to the applicable tolerances specified in Table II-7 when tested in accordance with VTM- 25. TABLE II-6 Design Range: Select Material, Type I % by Weight of Material Passing Sieve 3 in 2 in No. 10 No. 40 No. 200 ASTM D4791 Flat & Elongated 5:1 100 95-100 25-55 16-30 4-14 30% max.
2.Type II and Type III: Grading for Types II and III shall conform to the following when tested in accordance with VTM-25: % by Weight of Material Passing Sieve Type 3 in 2 in No. 200 II Min. 100 Min. 100 Max. 25 III1 Max. 20 1A maximum of 25 percent of m aterial retained on the No. 200 sieve will be allowed for Type III if the liquid limit is less than 25 and the plasticity index is less than 6.207.02
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 178–178 of 1,065.