Long-Term Field Performance of Warm Mix Asphalt Technologies (2017) / Chapter Skim
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Pages 88-108
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From page 88... ...
88 Introduction This appendix documents the material properties and performance evolution for the new projects (i.e., MT I-15, TN SR 125, IA US 34, and LA US 61 projects) based on (1)
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89 Creep Compliance Figures F.5 through F.8 present the creep compliance master curve comparisons between the first-round and secondround field cores for the MT I-15, TN SR 125, IA US 34, and LA US 61 projects, respectively. For the MT I-15 project (Figure F.5)
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90 100 1000 10000 100000 0.0001 0.1 100 100000 100000000 1E+11 D yn am ic M od ul us (M Pa ) Reduced Frequency (Hz)
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91 100 1000 10000 100000 0.0001 0.1 100 100000 100000000 D yn am ic M od ul us (M Pa ) Reduced Frequency (Hz)
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92 1E-11 1E-10 1E-09 1E-08 0.0000001 1E-10 0.0000001 0.0001 0.1 100 100000 100000000 C re ep co m pl ia nc e ( 1/P a)
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93 For the TN SR 125 project (Figure F.6) , the creep compliance curves of the 2014 field cores are lower than those of the 2011 field cores for both the HMA and the Evotherm mixtures.
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94 projects, the fracture work density values of the second-round field cores are either comparable with (IA US 34) or lower (TN SR 125 and LA US 61)
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95 Project Mix Type First-Round HFS, mm/mm Second-Round HFS, mm/mm First-Round Air Void Content, % Second-Round Air Void Content, % MT I-15 HMA 0.0096 (0.0015)
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96 Project Mix Type First-Round Fracture Work Density, kPa Second-Round Fracture Work Density, kPa First-Round Air Void Content, % Second-Round Air Void Content, % MT I-15 HMA 28.7 (12.7)
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97 Project Mix Type First-Round IDT Strength, kPa Second-Round IDT Strength, kPa First-Round Air Void Content, % Second-Round Air Void Content, % MT I-15 HMA 3360.4 (1437.4)
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98 the 2013 field cores show comparable RRI values with the 2011 field cores, although the 2013 field cores have lower air void contents due to traffic densification. The laydown of the chip seal may have slowed the aging of the pavement and thus led to unimproved rutting resistance.
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99 Project Binder Type Jnr3.2 R3.2 First-Round, kPa Second-Round, kPa First-Round, % Second-Round, % MT I-15 HMA 0.38 (0.04)
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100 Evotherm binder from the TN 125 project shows statistically lower fracture energy values than the 2011 Evotherm extracted binder. Extracted Binder Fracture Properties at the Low Temperature Table F.14 presents the binder failure strain (at 41°F)
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Material Material Property HMA vs. WMA 2011 2013 14°F 68°F 86°F 14°F 68°F 86°F Mix Dynamic Modulus Sasobit < = = = = = Evotherm < = = = = > Foaming = = = = = = Creep Compliance Sasobit = > > = > = Evotherm = = = = > = Foaming = = < = > = Vertical Failure Deformation (68°F)
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102 (a) HMA section (b)
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103 (a) HMA: reflective cracking (b)
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104 (a) Before Construction (b)
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105 Figure F.16. (Continued)
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(a) Transverse Cracking Comparison 0.0 50.0 100.0 150.0 200.0 250.0 Tr an sv er se Cr ac k Le ng th , ft /2 00 ft HMA Evotherm Existing Overlay 10/24/2010 12/16/2014 (b)
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107 (a) Transverse Crack 0 20 40 60 80 100 Tr an sv er se Cr ac k Le ng th , ft /2 00 ft HMA Sasobit Evotherm (b)
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108 (a) Transverse Crack 0.0 20.0 40.0 60.0 80.0 100.0 Tr an sv er se C ra ck L en gt h, ft /2 00 ft HMA Sasobit Evotherm 0.00 0.02 0.04 0.06 0.08 0.10 0.12 Ru t D ep th , i n.
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