TY - JOUR
T1 - Investigating the healing capacity of asphalt mixtures containing iron slag
AU - Li, Mingxia
AU - Wu, Guoxiong
AU - Fini, Elham H.
AU - Yu, Miao
AU - Xu, Zhigang
N1 - Funding Information:
The research was supported by the China National Outstanding Youth Research Fund Project ( 51608085 ), the Postgraduate Research Innovation Fund Project of Chongqing Jiaotong University , China ( 2018B0103 ), and the China Scholarship Council , China ( 201908500149 ). The authors appreciate support of laboratory staff at are Chongqing Jiaotong University of China.
Funding Information:
The research was supported by the China National Outstanding Youth Research Fund Project (51608085), the Postgraduate Research Innovation Fund Project of Chongqing Jiaotong University, China (2018B0103), and the China Scholarship Council, China (201908500149). The authors appreciate support of laboratory staff at are Chongqing Jiaotong University of China.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/11/20
Y1 - 2020/11/20
N2 - This study examines the healing capacity of an asphalt mixture after the introduction of an iron-based additive (iron slag). It is hypothesized that iron-based additives can facilitate healing of asphalt pavement by enhancing the thermal conductivity of the asphalt pavement. To study the healing capacity of asphalt mixtures containing iron slag, specimens with various amounts of iron slag additive were prepared and tested using a semi-circular bending test. Healing tests were performed on samples with different crack lengths, which each crack length representing a specified damage degree. Infrared heating was used to condition each specimen to facilitate healing. The significance of factors such as the amount of iron slag, the healing temperature, the healing time, and the damage degree were studied through grey correlational mathematical analysis. Among the samples tested, the optimal healing content of iron additive was 2%, the optimal healing temperature was 60 °C. Samples with a damage degree of 30% recovered about 59% of their original structural strength. And the results from grey relational analysis showed that the extent of damage was the most influential factor, followed by healing temperature, dosage of iron slag, and healing time.
AB - This study examines the healing capacity of an asphalt mixture after the introduction of an iron-based additive (iron slag). It is hypothesized that iron-based additives can facilitate healing of asphalt pavement by enhancing the thermal conductivity of the asphalt pavement. To study the healing capacity of asphalt mixtures containing iron slag, specimens with various amounts of iron slag additive were prepared and tested using a semi-circular bending test. Healing tests were performed on samples with different crack lengths, which each crack length representing a specified damage degree. Infrared heating was used to condition each specimen to facilitate healing. The significance of factors such as the amount of iron slag, the healing temperature, the healing time, and the damage degree were studied through grey correlational mathematical analysis. Among the samples tested, the optimal healing content of iron additive was 2%, the optimal healing temperature was 60 °C. Samples with a damage degree of 30% recovered about 59% of their original structural strength. And the results from grey relational analysis showed that the extent of damage was the most influential factor, followed by healing temperature, dosage of iron slag, and healing time.
KW - Grey relational analysis (GRA)
KW - Healing
KW - Healing capacity
KW - Iron-based additive
KW - Semi-circular bending
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U2 - 10.1016/j.conbuildmat.2020.119446
DO - 10.1016/j.conbuildmat.2020.119446
M3 - Article
AN - SCOPUS:85086888168
SN - 0950-0618
VL - 261
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 119446
ER -