2.2.1
Coarse Aggregate
Coarse aggregate shall consist of clean, sound, durable particles meeting
the following requirements.
2.2.1.1
Film Retention
The aggregate shall exhibit not less than 95 percent retention of
bituminous film.
2.2.1.2
Particle Shapes
The quantity of flat and elongated particles on any sieve shall not exceed
20 percent by weight when determined in accordance with ASTM D 4791. A
flat particle is one having a ratio of width to thickness greater than 3;
an elongated particle is one having a ratio of length to width greater than
3.
2.2.1.3
Weight Loss
The percent weight loss shall not exceed 40 after 500 revolutions, as
determined in accordance with ASTM C 131.
2.2.1.4
Friable Particles
The amount of friable particles shall not exceed 0.1 percent of the total
weight of aggregate sample when tested in accordance with ASTM C 142.
2.2.1.5
Crushed Slag
The dry weight of crushed slag shall not be less than 1200 kilograms per
cubic meter (75 pcf), 75 pcf, as determined in accordance with ASTM C 29/C
29M.
2.2.1.6
Crushed Aggregate
Crushed aggregate retained on the 4.75 mm No. 4 sieve and each coarser
sieve shall contain at least 75 percent by weight of crushed pieces having
one or more fractured faces with the area of each face equal to at least 75
percent of the smaller midsectional area of the aggregate particle. When
two fractures are contiguous, the angle between the planes of fractures
shall be at least 30 degrees to count as two fractured faces.
2.2.2
Fine Aggregate
Fine aggregate shall consist of clean, sound, durable particles of crushed
stone, durable particles of crushed stone, slag, or gravel. The aggregate
shall meet its requirements for stripping, abrasion resistance and percent
friable particles as specified for coarse aggregate.
2.3
ANTISTRIPPING AGENT
The use of antistripping agent is subject to prior approval by the
Contracting Officer.
2.4
EMULSIFIED ASPHALT FOR FOG SEAL
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NOTE: In the majority of applications, the cationic
SECTION 02785
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