Details:

Creators:
Kim, Yong-Rak ; Zhang, Jun ; Ban, Hoki
Kim, Yong-Rak ; Zhang, Jun ; Ban, Hoki Less -
Corporate Creators:
University of Nebraska--Lincoln. Dept. of Civil Engineering
Corporate Contributors:
Nebraska. Dept. of Roads
Subject/TRT Terms:
[+]
Asphalt Pavement Asphalt Pavements MEPDG Pavement Performance Performance Performance Measurement Performance Tests Warm-mix Asphalt Warm Mix Paving Mixtures
Publication/ Report Number:
MPM-02
Resource Type:
Tech Report
Geographical Coverage:
Nebraska
Corporate Publisher:
Nebraska Transportation Center
Abstract:
The primary objective of this research is to evaluate the feasibility of several WMA mixtures as potential asphalt paving

mixtures for Nebraska pavements. To that end, three well-known WMA additives (i.e., Sasobit, Evotherm, and Advera

synthetic zeolite) were evaluated. For a more realistic evaluation of the WMA approaches, trial pavement sections of the

WMA mixtures and their HMA counterparts were implemented in Antelope County, Nebraska. More than one ton of

field-mixed loose mixtures was collected at the time of paving and was transported to the NDOR and UNL laboratories to

conduct comprehensive laboratory evaluations and pavement performance predictions of the individual mixtures

involved. Various key laboratory tests were conducted to identify mixture properties and performance characteristics.

These laboratory test results were then incorporated into other available data and the MEPDG software to predict the

long-term field performance of the WMA and HMA trial sections. Pavement performance predictions from the MEPDG

were also compared to two-year actual field performance data that have annually been monitored by the NDOR pavement

management team.

The WMA additives evaluated in this study did not significantly affect the viscoelastic stiffness characteristics of the

asphalt mixtures. WMA mixtures generally presented better rut resistance than their HMA counterparts, and the WMA

with Sasobit increased the rut resistance significantly, which agrees with other similar studies. However, two laboratory

tests—the AASHTO T283 test and semi-circular bend fracture test with moisture conditioning—to assess moisture

damage susceptibility demonstrated identical results indicating greater moisture damage potential of WMA mixtures.

MEPDG results simulating 20-year field performance presented insignificant pavement distresses with no major

performance difference between WMA and HMA, and this has been confirmed by actual field performance data.

Although only two-year field performance is available to date, both the WMA and HMA have performed well. No

cracking or other failure modes have been observed in the trial sections. The rut depth and the roughness of WMA and

HMA sections were similar.


Format:
PDF
Funding:
26-1121-0005-001
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:069caed40378a72e1c45620079160f4e4659bf4091ef37077d5e41f70a6ff60e
Download URL:
https://rosap.ntl.bts.gov/view/dot/24749/dot_24749_DS1.pdf
File Type:

Supporting Files

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