Long-Term Field Performance of Warm Mix Asphalt Technologies (2017) / Chapter Skim
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21 Introduction This chapter compares the results of in-the-field transverse cracking for the HMA and WMA pavements based on the 2012–2013 (first-round) and 2014–2015 (second-round)
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transverse crack Figure 3.1. Typical transverse cracking in overlay.
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23 Note: The number in parentheses indicates the number of HMA-WMA pairs in each crack length comparison.
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24 technologies are divided into three categories, namely chemical (including Evotherm and LEA) , organic (including Sasobit)
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25 0 50 100 150 200 250 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Tr an sv er se C ra ck L en gt h, ft /2 00 ft Pavement Age, years TN SR 125 IA US 34 MT I-15 HMA WMA Figure 3.7. Transverse crack length versus pavement age for the second-round distress survey.
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26 critical to the organic modified WMA pavement than to other WMA technologies in the long term. Further research is needed to evaluate the effect of long-term aging on WMA additives.
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27 Figure 3.10. Number of HMA-WMA pairs that have consistent rankings between material property ranking and transverse cracking ranking based on the first-round distress survey results.
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28 (24 out of 35 pairs) continue to provide the highest number of correlations for the ranking of transverse cracking.
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29 and Roque 1994; Fromm and Phang 1972)
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30 method was used. Each sample data item was validated once using LOOCV; Figure 3.13 (b)
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