Research on Water Stability and Moisture Damage Mechanism of a Steel Slag Porous Asphalt Mixture

Xiaobing Chen (), Miao Zhang (), Jianming Yao, Xiaofei Zhang, Wei Wen, Jinhai Yin and Zhongshan Liang
Additional contact information
Xiaobing Chen: School of Transportation, Southeast University, Nanjing 211189, China
Miao Zhang: School of Transportation, Southeast University, Nanjing 211189, China
Jianming Yao: Suzhou Jiaotou Construction Management Co., Ltd., Suzhou 215007, China
Xiaofei Zhang: Kunshan Traffic Development Holdings Group Co., Ltd., Suzhou 215300, China
Wei Wen: Jiangsu Sinoroad Transportation Science and Technology Co., Ltd., Nanjing 211800, China
Jinhai Yin: Suzhou Sanchuang Pavement Engineering Co., Ltd., Suzhou 215124, China
Zhongshan Liang: Suzhou Sanchuang Pavement Engineering Co., Ltd., Suzhou 215124, China

Sustainability, 2023, vol. 15, issue 20, 1-23

Abstract: A steel slag porous asphalt (SSPA) mixture, as the surfacing layer of permeable asphalt pavements, not only ensures the pavement surface drainage and noise reduction functions, but also improves the comprehensive utilization of steel slag resources and the inherent protection of the ecological environment. However, compared with ordinary asphalt mixtures, SSPA is more susceptible to water damage, such as scouring and frost swelling caused by external rainwater intrusion, resulting in the deterioration of the pavement performance. Therefore, it is of good practical imperative to study the water stability and moisture damage mechanism of SSPAs. In this study, the water stability of SSPA, that was subjected to a series of time–temperature H 2 O-immersion schemes, was investigated using the pull-out and H 2 O-immersion Marshall tests, whilst the microscopic mechanism of moisture damage was studied using the scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), and X-ray diffraction (XRD) tests. The corresponding results showed that: (a) with the increase in the H 2 O immersion time, the water stability of SSPA first increased and then decreased; and (b) the water stability of SSPA was strong under medium-temperature H 2 O-immersion or short-term high-temperature H 2 O-immersion. SEM, on the other hand, showed that the transition zone spacing was closely related to the chemical adhesion mechanism between the asphalt and steel slag aggregate. Additionally, the FTIR analysis further showed that the steel slag asphalt mastic spectra had new absorption peaks at 3200~3750 cm −1 , inherently indicating the existence of chemical bonding between the asphalt and steel slag, with the XRD results showing that CaSO 4 ·2H 2 O had a beneficial effect on the water stability of SSPA.

Keywords: steel slag porous asphalt mixture (SSPA); time–temperature H 2 O-immersion; water stability; microscopic mechanism; pull-out test; Marshall test; SEM; FTIR; XRD (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/20/14958/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/20/14958/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:20:p:14958-:d:1261277

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().