Field Validation Database for Binder Testing Procedures Recommended - - PowerPoint PPT Presentation

Field Validation Database for Binder Testing Procedures Recommended by NCHRP 9-10

Wilfung Martono H.U.Bahia University of Wisconsin-Madison

ETG Meeting Fall 2003 – Las Vegas, NV

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Background

! Need for Field Validation of

! Binder repeated creep concept for rutting ! Binder PP time sweep test concept for

fatigue

! Select asphalts from MRL

! Sections with known performance ! Available binders

! 10 States -- 25 binders

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10 States- 25 binders

! Mississippi : 6- Control, multigrade, CRM, 3 PMAs ! Missouri : 4- Control, Oxidized and PMAs ! Pennsylvania :4- AC20, 3 PMAs ! Nebraska : 3- all modified F1,F2B, F3C ! California : 2– AR8000, 6A/LLP ! Alberta : 2- 200/300p, LTPP21 modified ! Kansas : 2- AC10, PMA AC5 ! Nevada : 2- AC 20 and AC-20 P ! Texas: 2– AC5 and AC 10 Modified

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Binder Rutting Test (DSR)

0.00 0.05 0.10 0.15 0.20 10 20 30

Time (seconds) Strain (mm/mm) Test data Fit

Accumulated Strain Cycles

In this test loading of 25 Pa is applied for 1 sec And removed for 9 sec. The accumulated Strain is measured and the viscous component Is estimated under steady state condition.

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Rutting Measurements

15 KS AC-10 58 4.55 5.79E+02 13.701 0.548 LTTP ID 16 KS AC-10 70 0.94 5.79E+02 81.045 200210 17 KS PMAC AC- 5 58 5.40 2.49E+03 3.121 0.365 18 KS PMAC AC- 5 70 1.90 3.63E+02 21.165 200902 Reported No Project Binder TT G*/sin(δ δ δ δ) η η η ηss Final strain Rutting Notes (C) (kPa) (Pa.s) (mm/mm) (mm)

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G* Sin δ Compared to ηss

y = 492.89x + 571.58 R

2 = 0.3147

5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 15 30 45

G*/Sinδ δ δ δ, Kpa

η η η ηss

, Pa-s

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Correlation of ηss to Field Rutting- 70 C Data

Field Rutting Vs. η η η ηss y = -2.3532Ln(x) + 20.804 R

2 = 0.9502

y = -1.6001Ln(x) + 15.22 R

2 = 0.4943

2 4 6 8 10 12 1000 2000 3000 4000 5000 6000 η η η ηss Field Rutting (in mm) MS 70C MO 70C NV 70C KS 70C

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Field Rutting Vs. η η η ηss y = 131.38x

• 0.3943

R

2 = 0.9836

y = 125.89x

• 0.42

R

2 = 0.4587

2 4 6 8 10 12 5000 10000 15000 20000 25000 η η η ηss Field Rutting (in mm) MS 58C MO 58C NV 58C KS 58C

Correlation of ηss to Field Rutting- 58 C Data

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Correlation of G* .sind to Field Rutting- 58 C Data

Field Rutting Vs. G*/sin (δ) δ) δ) δ) y = 18.189x -0.4679 R 2 = 0.9182 y = 322.81x -1.609 R 2 = 0.7286 2 4 6 8 10 12 10 20 30 40 50 G*/sin (δ) δ) δ) δ) Field Rutting (in mm) MS 58C MO 58C NV 58C KS 58C

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Binder Fatigue Test (DSR)

G*, G*.sin(d) Vs. Time

0.0E+00 1.0E+06 2.0E+06 3.0E+06 4.0E+06 5.0E+06 6.0E+06 0.0E+00 2.0E+02 4.0E+02 6.0E+02 8.0E+02 1.0E+03 1.2E+03 1.4E+03 1.6E+03

Time (in s) G* (in Pa)

`

G* (Complex Modulus)

G*.sin(d)

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Binder Fatigue Damage Analysis (Controlled Stress)

500 1000 1500 2000 2500 3000 3500 4000 4500 2000 4000 6000 8000

• No. of Cycles

Dissipated Energy Ratio (DER) Np

1

No Damage-- I nitiation-- Propagation

N20

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Binder Fatigue Test (DSR)

0.0E+00 5.0E+03 1.0E+04 1.5E+04 2.0E+04 2.5E+04 3.0E+04 0.0E+00 1.0E+04 2.0E+04 3.0E+04 4.0E+04 5.0E+04 6.0E+04

Number of Cycles

Np

Dissipated Energy Ratio

N10 N20

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Binder Fatigue Results

No State Binder TT Stress G* ini d ini G*sin(d) (kPa) (kPa) (kPa) 1 MS Styrelf 25 274.00 7.75E+03 49.20 1.02E+04 25 342.50 6.71E+03 50.60 8.68E+03 2 MS Rouse Rubber 25 204.00 8.87E+03 45.20 1.25E+04 25 3 MS Control 25 274.50 1.46E+04 45.20 2.06E+04 25 366.00 1.35E+04 46.40 1.86E+04 4 MS Multigrade 25 280.50 1.57E+04 41.10 2.39E+04 25 374.00 1.45E+04 42.60 2.14E+04

High High Stress Stress Low Low Stress Stress

γ γ γ γ γ γ γ γ2

2

γ γ γ γ γ γ γ γ1

1

τ τ τ τ τ τ τ τ1

1

τ τ τ τ τ τ τ τ2

2

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Example of Fatigue Analysis

No State Binder Wi ini Np Np10 Np20 Nf (kPa) (cycles) 1 MS Styrelf 23.04 83,226 86,050 103,764 116,400 42.44 5,479 1,636 6,273 7,800 2 Rouse Rubber 10.46 72,708 67,925 90,479 105,000 3 Control 11.50 61,411 67,463 74,857 81,400 22.57 16,561 17,244 20,610 23,000 4 Multigrade 10.35 89,925 96,684 110,746 122,600 20.51 14,748 14,367 18,431 21,000

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Estimating Fatigue at a given Wi value

0.00E+00 1.00E+04 2.00E+04 3.00E+04 4.00E+04 5.00E+04 6.00E+04 0.00 2.00 4.00 6.00 8.00 10.00 Strain (in %) Number of cycles to 50% Gini

PG 64-28 Unmod PG 64-28 Mod PG 76-22 Mod PG 76-22 Oxidized

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Fatigue Analysis Results

No State Binder K1 K2 Np 20 at Wi 22.5 kPa 1 MS Styrelf 2.0E+11

• 4.5925

1.23E+05 2 Rouse Rubber 3 Control 8.0E+06

• 1.9135

2.07E+04 4 Multigrade 5.0E+07

• 2.6212

1.43E+04 5 Cryopolymer 6 Seal-O-Flux 3.0E+08

• 2.9531

3.05E+04

1 2 3 4

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Effect of Binder Type and Testing Conditions on Fatigue

y = 3E+06x-1.7682 R2 = 0.6974 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+00 1.E+01 1.E+02 Wi (in kPa) Np20 (in cycles)

Effect of Binder Type Effect of Testing Stress

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No Correlation to G* sind

y = 2.4045x + 39652 R 2 = 0.0195

100,000 200,000 300,000 400,000 5000 10000 15000 20000 25000 30000 G*.sin

• Cycles to Failure, Nf

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Example of Strain Effect

• n Analysis- Missouri Sections

1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

1.E+00 1.E+01 1.E+02

Strain (in %) Number of cycles to failure

PG 64-28 UnMod PG 64-28 Mod PG 76-22 Mod PG 76-22 Oxidized

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0.E+00 1.E+04 2.E+04 3.E+04 4.E+04 5.E+04 0.E+00 1.E+04 2.E+04 3.E+04 4.E+04 5.E+04 6.E+04 7.E+04 8.E+04 9.E+04 Wi ini (in Pa) Np20 PG 64-28 Unmod PG 64-28 Mod PG 76-22 Mod PG 76-22 Oxidized

Fatigue Analysis Method is very Important for Ranking

Using Wi Using Strain

1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

1.E+00 1.E+01 1.E+02

Strain (in %) Number of cycles to failure

PG 64-28 UnMod PG 64-28 Mod PG 76-22 Mod PG 76-22 Oxidized

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Final Remarks

! Field Validation is necessary for

! Verification ! Deriving Specification limits

! Rutting parameter appears promising

! RTFO aging effects should be studied

! Fatigue is more complicated

! Highly dependent on temperature ! Power-law relationship- K1 and K2 are needed for

analysis

! Pavement structure condition

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Future Work

! Field performance data ! ETG can/should continue this effort ! Please send comments to:

! Dr. Ed Harrigan – NCHRP

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Thank You for this Opportunity Questions !