TY - JOUR
T1 - Innovative use of industrially produced steel slag powders in asphalt mixture to replace mineral fillers
AU - Chen, Zongwu
AU - Leng, Zhen
AU - Jiao, Yuyong
AU - Xu, Fang
AU - Lin, Juntao
AU - Wang, Haopeng
AU - Cai, Jun
AU - Zhu, Linlu
AU - Zhang, Yunlong
AU - Feng, Namin
AU - Dong, Yidan
AU - Zhang, Yang
N1 - Funding Information:
This work was financially supported by the Natural Science Foundation of China (Nos. 51808517 & 41731284 & 52008042 ), the Hong Kong Scholars Schedule (No. XJ2019041) and its matching fund from The Hong Kong Polytechnic University (G-YZ3J), the Hubei Chenguang Talented Youth Development Foundation, the Open Fund of Key Laboratory of Road Structure and Material of Ministry of Transport ( Changsha University of Science & Technology ) (No. kfj190302), the Open Fund of State Key Laboratory of Green Building Materials (No. 2021GBM03), the Open Fund of State Key Laboratory of High Performance Civil Engineering Materials (No. 2020CEM008), the Open Fund of State Key Laboratory of Subtropical Building Science (No. 2022ZB17) and the National Students Innovation and Entrepreneurship Training Program (Nos. 201910491088 & 202010491075 & 202010491029 & S202110491095 & S202110491016 ).
Publisher Copyright:
© 2022
PY - 2022/4/10
Y1 - 2022/4/10
N2 - Using steel slag to partially replace the natural aggregate in asphalt mixture to produce high-performance asphalt mixture has gained significant interest in recent years as a value-added option to recycle steel slag. However, the poor homogeneity of the material properties of steel slag aggregates remains a concern for this recycling approach. In this study, an innovative method of using industrially produced steel slag powder (SSP) to replace the mineral filler in asphalt mixture was proposed to address this concern. Five fillers, including four SSP fillers, obtained by grinding different steel slag aggregates with an industrialized production line, and one conventional limestone powder (LP) filler, were evaluated. The chemical compositions and micro-morphologies of the SSPs were first characterized to evaluate the material homogeneity and gain insights into the advantages of using SSPs as fillers. Then, asphalt mixtures with different fillers were designed and produced, and their moisture stability, rutting resistance, and low-temperature crack resistance, were characterized. It was found that the industrially produced SSPs possessed homogeneous properties, and improved the compatibility between filler particles and asphalt binder. Besides, the asphalt mixtures with SSP fillers showed better resistance to the moisture damage, permanent deformation, low-temperature crack in terms of fracture energy, than the asphalt mixture with LP filler. Therefore, it was concluded that using SSPs as a replacement of mineral fillers in asphalt mixture provided a reliable and value-added solution to recycle steel slag.
AB - Using steel slag to partially replace the natural aggregate in asphalt mixture to produce high-performance asphalt mixture has gained significant interest in recent years as a value-added option to recycle steel slag. However, the poor homogeneity of the material properties of steel slag aggregates remains a concern for this recycling approach. In this study, an innovative method of using industrially produced steel slag powder (SSP) to replace the mineral filler in asphalt mixture was proposed to address this concern. Five fillers, including four SSP fillers, obtained by grinding different steel slag aggregates with an industrialized production line, and one conventional limestone powder (LP) filler, were evaluated. The chemical compositions and micro-morphologies of the SSPs were first characterized to evaluate the material homogeneity and gain insights into the advantages of using SSPs as fillers. Then, asphalt mixtures with different fillers were designed and produced, and their moisture stability, rutting resistance, and low-temperature crack resistance, were characterized. It was found that the industrially produced SSPs possessed homogeneous properties, and improved the compatibility between filler particles and asphalt binder. Besides, the asphalt mixtures with SSP fillers showed better resistance to the moisture damage, permanent deformation, low-temperature crack in terms of fracture energy, than the asphalt mixture with LP filler. Therefore, it was concluded that using SSPs as a replacement of mineral fillers in asphalt mixture provided a reliable and value-added solution to recycle steel slag.
KW - Asphalt mixture
KW - Engineering performance
KW - Filler
KW - Material property
KW - Steel slag powder
UR - http://www.scopus.com/inward/record.url?scp=85126787584&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2022.131124
DO - 10.1016/j.jclepro.2022.131124
M3 - Journal article
AN - SCOPUS:85126787584
SN - 0959-6526
VL - 344
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 131124
ER -