Transportation Research Congress 2016
Analysis on Moisture Susceptibility of Warm Mix Asphalt Affected by Moist Aggregate and Multiple Freeze-Thaw Cycles
Publication: Transportation Research Congress 2016: Innovations in Transportation Research Infrastructure
ABSTRACT
To analyze the effect of moist aggregate and multiple freeze-thaw cycles on moisture susceptibility of warm mix asphalt (WMA) containing organic wax additive (Sasobit), different target moisture contents (1%, 2%, 3%) of aggregates (limestone and basalt) are simulated using the bucket-mixer heating method in lab. The moisture susceptibility of WMA that composed of 3% Sasobit modified asphalt binder (by weight of SK-90 asphalt binder) and different types of dry/moist aggregates in one/two freeze-thaw cycles are test using the modified Lottman test. The test results show the moisture susceptibility of WMA linearly decreases significantly with the increase of moisture content and freeze-thaw cycle number. The moisture susceptibility of WMA made with moist aggregate cannot meet the current specification in China. However, under identical conditions (same moisture content and freeze-thaw cycle number), the moisture susceptibility of WMA made with basalt is better than that of WMA made with limestone.
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ACKNOWLEDGMENT
The paper is supported by the Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions (Grant No. PXM2013-014210-000165) and National Natural Science Foundation of China (51478028). The authors wish to express their gratitude to Mr. Jin-qi GAO for his assistance in some of the preliminary laboratory work.
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Published In
Transportation Research Congress 2016: Innovations in Transportation Research Infrastructure
Pages: 12 - 21
Editors: Linbing Wang, Ph.D., Virginia Polytechnic University, Jianming Ling, Ph.D., Tongji University, Pan Liu, Ph.D., Southeast University, Hehua Zhu, Tongji University, Hongren Gong, University of Tennessee Knoxville, and Baoshan Huang, Ph.D., University of Tennessee Knoxville
ISBN (Online): 978-0-7844-8124-0
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© 2018 American Society of Civil Engineers.
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Published online: Feb 6, 2018
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