1002.1 Scope. This specification covers aggregate to be used in asphaltic concrete.
1002.2 Coarse Aggregate.
1002.2.1 All coarse aggregate shall consist of sound, durable rock, free from cemented lumps or objectionable
coatings. When tested in accordance with AASHTO T 96, the percentage of wear shall not exceed 50. The percentage of deleterious substances shall not exceed the following values, and the sum of percentages of all deleterious substances shall not exceed 8.0 percent. Deleterious Material Percent by Weight Deleterious Rock 8.0 Shale 1.0 Other Foreign Material 0.5
1002.2.1 1 The above requirements apply to combined aggregates during production when used in accordance
with Sec 403.
1002.2.1 2 Crushed stone shall be obtained from rock of uniform quality. Rock tested from any combination of
ledges for source approval, and trial mix samples, shall meet the following criteria. Property Value Los Angeles Abrasion, AASHTO T 96, percent loss, max 50 Absorption, AASHTO T 85, percent, max 4.0
1002.2.2 Gravel aggregate shall be washed sufficiently to remove any objectional coating and shall meet the
following criteria for source approval and trial mix samples. Property Value Los Angeles Abrasion, AASHTO T 96, percent loss, max 50 Absorption, AASHTO T 85, percent, max 5.5
1002.2.3 Steel slag consisting principally of a fused mixture of oxides and silicates shall be a synthetic
aggregate produced as a by-product of basic oxygen, electric or open hearth steel making furnaces. The steel slag shall be aged at least three months after crushing and screening. Steel slag, which has been previously crushed, screened, and aged three months will not be required to receive additional aging. Steel slag from one source shall not be blended with steel slag from a different source.
1002.3 Fine Aggregate.
1002.3.1 Fine aggregate for asphaltic concrete shall be a fine, granular material passing the 3/8-inch sieve,
naturally produced by the disintegration of rock of a siliceous nature and/or manufactured by the mechanical reduction of sound durable rock in accordance with Secs 1002.2.1.2 and 1002.2.2. With written approval from the engineer and compliance with this specification, chat sand produced from flint chat in the Joplin area, dolomite chat as produced in the southeast lead belt area, fines manufactured from igneous rock, chert gravel or wet bottom boiler slag may be used as fine aggregate for asphaltic concrete. Fine aggregate shall be free from cemented or conglomerated lumps and shall not have any coating or injurious material. The percentage of deleterious substances shall not exceed the following values: Item Percent by Weight Clay lumps and shale 1.0 Total lightweight particles, including coal and lignite 0.5 Other deleterious substances 0.1
1002.3.2 The total lightweight particle requirement will not apply to wet bottom boiler slag, angular chert sand
or manufactured sand.
1002.4 Mineral Filler. Mineral filler shall be in accordance with AASHTO M 17. Prior to approval and use of
mineral filler for SMA mixtures, the manufacturer shall submit to Construction and Materials a certified test report from an approved independent testing laboratory showing specific test results when tested in accordance with applicable sections of AASHTO M17 and MoDOT Test Method TM-73. The certified test report shall contain the manufacturer's name, product, date tested and date of manufacture. In addition, the manufacturer shall submit to Construction and Materials a sample representing the mineral filler tested by the independent testing laboratory and accompanied by a material data sheet and an MSDS showing the product and composition or description of the product. The manufacturer shall guarantee that as long as the material is furnished under that brand and designation, the material will be of the same composition as originally approved and will in no way be altered or changed. Upon approval of the mineral filler, the manufacturer and product will be placed on a list of qualified SMA mineral fillers.
1002.5 Hydrated Lime. Hydrated lime shall be thoroughly dry and free of lumps. Hydrated lime shall be in
accordance with AASHTO M 303, Type I or II, except the gradation shall be determined in accordance with AASHTO T 37.
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