Block 10 superpave agg requirements 13
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Transcript of Block 10 superpave agg requirements 13
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Aggregate Superpave Aggregates 1
Superpave Aggregate PropertiesCurrently Required for HMA
Senior/GraduateHMA Course
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Aggregate Superpave Aggregates 2
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
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Aggregate Superpave Aggregates 3
Flat and Elongated Criteria
TrafficMillions of ESALs Maximum, Percent
< 0.3< 1< 3< 10< 30< 100> 100
----1010101010
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Aggregate Superpave Aggregates 4
Fine Aggregate Angularity Criteria
Traffic Depth from SurfaceMillions of ESALs < 100 mm (4”) > 100mm
< 0.3< 1< 3< 10< 30< 100>100
--404045454545
----4040404545
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Aggregate Superpave Aggregates 5
Clay Content Criteria
Traffic Sand EquivalentMillions of ESALs Minimum, Percent
< 0.3< 1< 3< 10< 30< 100> 100
40404045455050
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Aggregate Superpave Aggregates 6
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
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Aggregate Superpave Aggregates 7
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
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Aggregate Superpave Aggregates 8
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
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Aggregate Superpave Aggregates 9
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
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Aggregate Superpave Aggregates 10
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
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Aggregate Superpave Aggregates 11
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
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Aggregate Superpave Aggregates 12
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
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Aggregate Superpave Aggregates 13
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
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Aggregate Superpave Aggregates 14
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
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Aggregate Superpave Aggregates 15
QUESTIONS ?