Image Analysis of HMA to Characterize the Aggregate Distribution - - PowerPoint PPT Presentation

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Sep 21, 2022 504 likes •604 views

Image Analysis of HMA to Characterize the Aggregate Distribution Sanjeev Adhikari Zhanping You Analysis of Image Aggregate Gradation Aggregate Orientation Image Processing Raw Image Fine Image Processing Processed with density

SLIDE 1

Image Analysis of HMA to Characterize the Aggregate Distribution Sanjeev Adhikari Zhanping You

SLIDE 2

Analysis of Image

Aggregate Gradation
Aggregate Orientation

SLIDE 3

Image Processing

Raw Image Processed with density index Mastic: 164 Aggregate: >164 Fine Image Processing Using Image-Pro software

SLIDE 4

Sieving of Aggregates

4mm-2mm <1mm All aggregates 2mm-1mm 10mm-8mm 12.5mm-10mm 8mm-6.3mm 6.3mm-4mm

SLIDE 5

7.6

0.08

15.8 8.846447

0.315

28.6 8.873285 13.2775

36.4 22.15078 23.41152

46.8 45.5623 18.75009

58.6 64.31239 15.0146

6.3

68.5 79.32698 10.33229

79.6 89.65928 10.34072

92.7 100

12.5

97.2 100

100 100

20 Actual Gradation Passing sieve (%) Retain (%) Sieve size (mm) From Image

8.846447 13.2775 23.41152 18.75009 15.0146 10.33229 10.34072 % Area 636.7655 955.7116 1685.156 1349.627 1080.748 743.7165 744.3232 7197.984 Area <1mm 2-1mm 4-2mm 6.3-4mm 8-6.3mm 10-8mm 12.5-10mm Total

Aggregates Gradation from Images

It is difficult to capture aggregate less than 1mm

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Concept: Aggregate Orientation

-Angle histogram using polar plot

Vertical Horizontal

SLIDE 7

Aggregate orientation of HMA image

All aggregates Aggregates greater than 2mm

SLIDE 8

10mm-8mm 12.5mm-10mm 8mm-6.3mm 6.3mm-4mm

Aggregate Orientation: 1

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2mm-1mm 4mm-2mm <1mm All aggregates