block 10 superpave agg requirements 13

Aggregate Superpave Aggregates 1

Superpave Aggregate PropertiesCurrently Required for HMA

Senior/GraduateHMA Course


Coarse Aggregate Angularity Criteria

Traffic Depth from SurfaceMillions of ESALs < 100 mm (4”) > 100 mm

< 0.3< 1< 3< 10< 30< 100> 100

55/--65/--75/--85/8095/90

100/100100/100

--/----/--50/--60/--80/7595/90

100/100

First number denotes % with one or more fractured facesSecond number denotes % with two or more fractured faces


Flat and Elongated Criteria

TrafficMillions of ESALs Maximum, Percent

< 0.3< 1< 3< 10< 30< 100> 100

----1010101010


Fine Aggregate Angularity Criteria

Traffic Depth from SurfaceMillions of ESALs < 100 mm (4”) > 100mm

< 0.3< 1< 3< 10< 30< 100>100

--404045454545

----4040404545


Clay Content Criteria

Traffic Sand EquivalentMillions of ESALs Minimum, Percent

< 0.3< 1< 3< 10< 30< 100> 100

40404045455050


Aggregate Size Definitions

• Nominal Maximum Aggregate Size– one size larger than the first sieve

to retain more than 10%

• Maximum Aggregate Size– one size larger than nominal

maximum size

1001009072654836221594

100998972654836221594


100

0 .075 .3 2.36 4.75 9.5 12.5 19.0

Percent Passing

control point

restricted zone

max density line

maxsize

nommaxsize

Sieve Size (mm) Raised to 0.45 Power


Superpave Aggregate Gradation

100

0 .075 .3 2.36 12.5 19.0

Percent Passing

Design Aggregate Structure

Sieve Size (mm) Raised to 0.45 Power


Superpave Mix Size Designations

Superpave Nom Max Size Max SizeDesignation (mm) (mm)

37.5 mm 37.5 (1.5”) 50 (2”) 25 mm 25 (1”) 37.5 19 mm 19 (3/4”) 25 12.5 mm 12.5 (1/2”) 19 9.5 mm 9.5 (3/8”) 12.5 04.8 mm 04.8 (3/16”) 9.5


37.5 mm Superpave GradationSieve Size % Pass. Restricted Zone mm Control Points Min Max

50 100 37.5 90.0 100.025 19 12.5 9.5 4.75 34.7 34.72.36 15.0 41.0 23.3 27.31.18 15.5 21.50.6 11.7 15.70.3 10 100.150.075 0.0 6.0


25 mm Superpave GradationSieve Size % Pass. Restricted Zone mm Control Points Min

Max37.5 10025 90.0 100.019 12.5 9.5 4.75 39.5 39.52.36 19.0 45.0 26.8 30.81.18 18.1 24.10.6 13.6 17.60.3 11.4 11.40.150.075 1.0 7.0


19 mm Superpave GradationSieve Size % Pass. Restricted Zone mm Control Points Min Max

25 10019 90.0 100.012.5 9.5 4.75 2.36 23.0 49.0 34.6 34.61.18 22.3 28.30.6 16.7 20.70.3 13.7 13.70.150.075 2.0 8.0


12.5 mm Superpave Gradation

Sieve Size % Pass. Restricted Zone mm Control Points Min Max

19 10012.5 90.0 100.09.5 4.75 2.36 28.0 58.0 39.1 39.11.18 25.6 31.60.6 19.1 23.10.3 15.5 15.50.150.075 2.0 10.0


9.5 mm Superpave Gradation

Sieve Size % Pass. Restricted Zone mm Control Points Min

Max

12.5 1009.5 90.0 100.04.75 2.36 32.0 67.0 47.2 47.21.18 31.6 37.60.6 23.5 27.50.3 18.7 18.70.150.075 2.0 10.0


QUESTIONS ?

block 10 superpave agg requirements 13

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