Laboratory Evaluation on the Performance of Porous Asphalt Mixture with Steel Slag for Seasonal Frozen Regions

Abstract

Porous asphalt mixtures with steel slag (PAM-SS), as an eco-friendly and low-cost pavement material, are conducive to addressing the issue of urban floods and natural resource shortages. The primary objective of this paper was to explore the feasibility of the application of PAM-SS for seasonal frozen regions, and ascertain the optimal replacement percentage of natural aggregate. Steel slag coarse aggregate (SSCA) was used to replace basalt coarse aggregate (BCA) at four levels (25%, 50%, 75%, 100%) by equal volume. The volume characteristics, mechanical properties, low-temperature cracking resistance, water stability, and freeze-thaw (F-T) durability of the mixture were assessed. The results indicated that the low-temperature cracking resistance of the mixture was significantly enhanced and acoustic emission (AE) energy was uniformly released by the incorporation of steel slag. Furthermore, the porosity, permeability, Marshall stability (MS), and the resistance against water damage and F-T cycles were also significantly improved. Based on the experimental results, the complete replacement of natural aggregate is advisable to obtain an optimal overall performance.

Fracture Behavior of Permeable Asphalt Mixtures with Steel Slag under Low Temperature Based on Acoustic Emission Technique

“…The existing paper has proved that the interlocking structure is related to the multi-angularity and cubic shape of steel slag coarse aggregate [ 17 ]. The phase division based on cumulative RA and cumulative AF was similar to that based on AE energy reported in the author’s previous research, proving that cumulative RA and cumulative AF can also realize the identification of the damage stages in the low-temperature splitting test [ 57 , 58 ].…”

“…Differently, the near-constant behavior of sentry function was founded in the 0.6–0.9 displacement levels for SS-75, reflecting a balancing phase that the progressive storing of strain energy is equivalent to the steady release of AE energy caused by the crack growth in materials. In particular, a slight bottom-up trend was observed in the 0.6–0.9 displacement level for SS-100, indicating that it has strong strain energy storing capability related to the local resistance and hardening effect generated by the interlocking structure of steel slag coarse aggregates [ 57 ]. The sharp drops of sentry function were found in the 0.9–1.0 displacement levels for each group, indicating that the strain energy storing capability of the materials are dramatically deteriorated and the critical load leading to catastrophic failure of the specimen is about to reach.…”

Preliminary Validation of Steel Slag-Aggregate Concrete for Rigid Pavements: A Full-Scale Study

“…Although it has a relatively dry climate, it has large thermal oscillations between night and day, which result in frosts, and between the different seasons. This means that an outdoor exposure test performed in this location is extremely demanding for any type of material that will be directly exposed to the elements (sun, water, ice…) during its service life [39]. The main characteristics of the climatology of Burgos are shown in Figure 8.…”

“…. ) during its service life [39]. The main characteristics of the climatology of Burgos are shown in Figure 8.…”

Effects of Steel-Slag Components on Interfacial-Reaction Characteristics of Permeable Steel-Slag–Bitumen Mixture

“…Steel slag is a porous alkaline aggregate, so it has good adhesion to bitumen. In addition, steel slag has high wear resistance and is suitable pavement material [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. If steel slag can be utilized as an aggregate to prepare permeable steel-slag–bitumen concrete for pavement engineering, it can speed up the construction of ecological pavements, and enhance the resource utilization of steel slag, partially solving the shortage problem of the lack of high-quality natural-stone aggregate [ 11 , 12 ].…”