A Quantitative Method for Determining - RMACES · A Quantitative Method for Determining by Scott...
Transcript of A Quantitative Method for Determining - RMACES · A Quantitative Method for Determining by Scott...
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A Quantitative Method for Determining
by Scott Shuler
and Anthony Lord
Rocky Mountain Asphalt Conference and Equipment Show
2nd Annual Asphalt Research Symposium
Sunday, March 28, 2010
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Acknowledgements
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Acknowledgements
National Cooperative Highway Research Program
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Acknowledgements
National Cooperative Highway Research Program
Sunday, March 28, 2010
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Acknowledgements
National Cooperative Highway Research Program
Project 14-17 “Manual for Emulsion-Based Chip Seals for Pavement Preservation”
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What Are Chip Seals?
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Aggregate Design
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Aggregate
• Spread Rate
Design
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Aggregate
• Spread Rate– One Stone Thick
Design
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Aggregate
• Spread Rate– One Stone Thick
Design
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Aggregate
• Spread Rate– One Stone Thick
–Or…..
Design
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Aggregate
• Spread Rate– One Stone Thick
–Or…..
Design
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Aggregate
• Spread Rate– One Stone Thick
–Or…..
Design
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Design
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Getting it One Stone ThickDesign
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Getting it One Stone Thick• Follow A Design Method
– South Africa/Australia/New Zealand• Flakiness Index < 25%• ALD/Gradation - One-Sized• Traffic• Texture• Embedment
Design
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Getting it One Stone Thick• Follow A Design Method
– South Africa/Australia/New Zealand• Flakiness Index < 25%• ALD/Gradation - One-Sized• Traffic• Texture• Embedment
– Asphalt Institute/McLeod/Hanson• Asphalt Rates Too Low, Aggregate Rates Too High
Design
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Getting it One Stone Thick• Follow A Design Method
– South Africa/Australia/New Zealand• Flakiness Index < 25%• ALD/Gradation - One-Sized• Traffic• Texture• Embedment
– Asphalt Institute/McLeod/Hanson• Asphalt Rates Too Low, Aggregate Rates Too High
– Texas/Kearby/Gallaway/Epps• Asphalt Rates Too Low, Aggregate Rates Too Low
Design
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
• Turning Traffic Loose– Touchy Feely?– Science ?
• Surface Texture
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
• Turning Traffic Loose– Touchy Feely?– Science ?
• Surface Texture– Touchy Feely?– Measure It?
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
• Turning Traffic Loose– Touchy Feely?– Science ?
• Surface Texture– Touchy Feely?– Measure It?
• Surface Resistance– Ball Penetration
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
• Turning Traffic Loose– Touchy Feely?– Science ?
• Surface Texture– Touchy Feely?– Measure It?
• Surface Resistance– Ball Penetration
• Emulsion Correct on Job?
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
• Turning Traffic Loose– Touchy Feely?– Science ?
• Surface Texture– Touchy Feely?– Measure It?
• Surface Resistance– Ball Penetration
• Emulsion Correct on Job?– Measure It
Sunday, March 28, 2010
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Design Gets Us So Far, Then ‘Art’ Kicks in….. Right?
• Turning Traffic Loose– Touchy Feely?– Science ?
• Surface Texture– Touchy Feely?– Measure It?
• Surface Resistance– Ball Penetration
• Emulsion Correct on Job?– Measure It
Sunday, March 28, 2010
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Question
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Question
• Can a Lab Test be Used to Predict Emulsion or Residue Strength in the Field?
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Question
• Can a Lab Test be Used to Predict Emulsion or Residue Strength in the Field?
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Question
• Can a Lab Test be Used to Predict Emulsion or Residue Strength in the Field?
• If it Could, Maybe Judgment Could be Improved
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Chips at One-Stone Thickness
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“Pin-Art” Holds ChipsThe ‘Grabber’
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Template = 40% Embedment
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A Pneumatic Roller Would be an Improvement
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NCHRP 14-17“Traffic Simulator”
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The Experiment
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• AGGREGATES: – Basalt, Alluvial, Granite, Limestone
The Experiment
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• AGGREGATES: – Basalt, Alluvial, Granite, Limestone
• EMULSIONS: – RS-2, RS-2P, CRS-2, CRS-2P
The Experiment
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• AGGREGATES: – Basalt, Alluvial, Granite, Limestone
• EMULSIONS: – RS-2, RS-2P, CRS-2, CRS-2P
• EMULSION CURE: – 40%, 80%
The Experiment
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• AGGREGATES: – Basalt, Alluvial, Granite, Limestone
• EMULSIONS: – RS-2, RS-2P, CRS-2, CRS-2P
• EMULSION CURE: – 40%, 80%
• AGGREGATE MOISTURE: – Dry, SSD
The Experiment
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Experiment Design• Yiklm = µ + Ai + Wk + Ml + AWik + AMil + WMkl + AWMikl + eiklm
• • Where,• Yijklm = Chip Loss, %
• µ = mean loss, %
• Ai = effect of aggregate i on mean
• Wk = effect of water removed (40, 80%) k on mean
• Ml = effect of aggregate moisture l on mean (dry,SSD)
• AWik, etc. = effect of interactions on mean
• eiklm = random error
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Aggregates
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Aggregates
4.75 8.06.3 9.5
Sieve Size, mm
Pas
sing
, %
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Aggregates
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AggregatesLS GR BS AL
BSG 2.615 2.612 2.773 2.566Median Size, in 0.252 0.315 0.277 0.277ALD, in 0.170 0.265 0.218 0.222Design Coverage, psy
16.48 26.11 22.95 21.73
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Emulsions
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EmulsionsRS-2P RS-2 CRS-2 CRS-2P
SF, 50C 108 96 78 119Residue, % 65 68 68 68Pen, 25C, 100g 115 95 125 85Ductility, 25C 100+ 100+ 100+ 100+
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Dry Chips - 40% Moisture Loss
Chi
p Lo
ss, %
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Dry Chips - 40% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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Dry Chips - 80% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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Dry Chips - 80% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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SSD Chips - 40% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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SSD Chips - 40% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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SSD Chips - 80% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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SSD Chips - 80% Moisture Loss
Chi
p Lo
ss, %
Sunday, March 28, 2010
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ANOVA
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003Cure <0.0001 <0.0001 <0.0001 <0.0001
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003Cure <0.0001 <0.0001 <0.0001 <0.0001
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003Cure <0.0001 <0.0001 <0.0001 <0.0001A x M 0.2468 0.3618 0.0994 0.7574
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003Cure <0.0001 <0.0001 <0.0001 <0.0001A x M 0.2468 0.3618 0.0994 0.7574
A x C 0.0001 0.0020 0.3927 0.0005
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003Cure <0.0001 <0.0001 <0.0001 <0.0001A x M 0.2468 0.3618 0.0994 0.7574
A x C 0.0001 0.0020 0.3927 0.0005M x C 0.5425 0.0136 0.9999 0.9546
Sunday, March 28, 2010
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αααα
Source RS-2 RS-2P CRS-2 CRS-2P
ANOVA
Aggr <0.0001 <0.0001 0.3887 0.0049Moist 0.0169 0.0220 0.1597 0.0003Cure <0.0001 <0.0001 <0.0001 <0.0001A x M 0.2468 0.3618 0.0994 0.7574
A x C 0.0001 0.0020 0.3927 0.0005M x C 0.5425 0.0136 0.9999 0.9546A x M x C 0.1064 0.2088 0.8805 0.0114
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
RS-2PRS-2P
Allv A
Grn A
Bas A
LS B
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
RS-2PRS-2P
Allv A
Grn A
Bas A
LS B
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
RS-2PRS-2P
Allv A
Grn A
Bas A
LS B
CRS-2CRS-2
LS A
Grn A
Bas A
Allv A
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
RS-2PRS-2P
Allv A
Grn A
Bas A
LS B
CRS-2CRS-2
LS A
Grn A
Bas A
Allv A
CRS-2PCRS-2P
Grn A
Allv AB
Bas AB
LS B
Sunday, March 28, 2010
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Newman-Keuls Multiple Comparison
RS-2RS-2
Allv A
Grn B
LS B
Bas C
RS-2PRS-2P
Allv A
Grn A
Bas A
LS B
CRS-2CRS-2
LS A
Grn A
Bas A
Allv A
CRS-2PCRS-2P
Grn A
Allv AB
Bas AB
LS B
Sunday, March 28, 2010
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OK, So the Lab Test Works,But What About in the Field?
Sunday, March 28, 2010
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Sunday, March 28, 2010
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Arches, NP
Sunday, March 28, 2010
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Sunday, March 28, 2010
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Frederick, CO
Sunday, March 28, 2010
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Sunday, March 28, 2010
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Forks, WA
Sunday, March 28, 2010
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Arches, NP
Moisture Loss, %
Sunday, March 28, 2010
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Frederick, CO
Sunday, March 28, 2010
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Forks, WA
Moisture Loss, %Sunday, March 28, 2010
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Chip LossField Site Aggregates - Lab Sweep Test Results
Moisture Loss, %
Sunday, March 28, 2010
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Conclusions
Sunday, March 28, 2010
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Conclusions
• This chip seal performance test may provide a means for comparing strength of aggregate/emulsion combinations under various curing conditions.
Sunday, March 28, 2010
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Conclusions
Sunday, March 28, 2010
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Conclusions
• The amount of water remaining in the chip seal emulsion has a large effect on chip retention.
Sunday, March 28, 2010
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Conclusions
Sunday, March 28, 2010
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Conclusions
• Significantly higher chip loss was
measured for test specimens
fabricated with dry aggregates
compared with saturated surface
dry aggregates.
Sunday, March 28, 2010
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Conclusions
Sunday, March 28, 2010
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Conclusions
• No significant differences in chip loss could be measured either at 40 or 80 percent cure when cationic emulsions were compared with anionic emulsions on either calcareous or siliceous aggregates.
Sunday, March 28, 2010
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Conclusions
Sunday, March 28, 2010
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Conclusions
• This Preliminary Data Suggests the New Sweep Test May be Used to Predict “Time to Traffic” for Fresh Chip Seals.
Sunday, March 28, 2010
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Questions ?
Sunday, March 28, 2010
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Thank You !
Sunday, March 28, 2010