Step 3: Test remaining full sample for lightweight particles
(Sp.Gr.2.0) and remove.
Step 4. Test remaining full sample for chert and/or cherty stone with
SSD density of less than 2.40 Mg/cubic meter (Sp. Gr. 2.40). Remove
lightweight chert and/or cherty stone. Restore other materials less
than 2.40 to the sample.
Step 5: Test remaining sample for clay-ironstone, shale, claystone,
mudstone, siltstone, shaly and/or argillaceous limestone, and remove.
Step 6: Test approximately one-fifth of remaining full sample for
other soft particles.
2.2.2.6
Deleterious Material-Road Pavements
**************************************************************************
NOTE: Use this paragraph only for heavy-duty
pavements, roads, streets, and parking lots for
vehicular and tracked traffic. Otherwise, delete.
**************************************************************************
The amount of deleterious material in each size group of coarse aggregate
shall not exceed the limits in the following table when tested as indicated.
LIMITS OF DELETERIOUS MATERIALS IN COARSE
AGGREGATE FOR ROAD PAVEMENTS
Percentage by Mass
Clay lumps and friable particles
2.0
(ASTM C 142)
Material finer than 0.075 mm
1.0
(No. 200 sieve) (ASTM C 117)
Lightweight particles
1.0
(ASTM C 123)
Other soft particles
2.0
(COE CRD-C 130)
Total of all deleterious substances,
5.0
exclusive of material finer than
0.075 mm No. 200 sieve
The limit for material finer than the 0.075 mm No. 200 sieve will be
increased to 1.5 percent for crushed aggregates consisting of crusher dust
that is essentially free from clay or shale. The separation medium for
lightweight particles shall have a density of 2.0 Mg/cubic meter (Sp. Gr.
2.0). This limit does not apply to coarse aggregate manufactured from
blast-furnace slag unless contamination is evident.
2.2.3
Fine Aggregate
2.2.3.1
Fine aggregate shall consist of natural sand, manufactured sand, or a
combination of the two, and shall be composed of clean, hard, durable
particles. [Aggregate used for paving compass calibration hardstands shall
SECTION 02753
Page 42
Previous Page
