Function Investigation of Stone Mastic Asphalt (SMA) Mixture Partly Containing Basic Oxygen Furnace (BOF) Slag

Chen, Zongwu; Wu, Shaopeng; Pang, Ling; Xie, Jun

doi:10.5301/jabfm.5000307

Cited by 7 publications

(5 citation statements)

References 17 publications

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“…A Woszuk et al [3] used zeolite materials as replacement of the filler in the warm-mix asphalt technology as an asphalt foaming additive, and found clinoptilolite could partially replace the traditional lime filler, without a negative impact on the asphalt mastic properties. Additionally, steel slag, characterized by high basicity, rich geometric features and excellent mechanical properties [4], has been justified its feasibility to replace aggregate in road engineering [5,6]. E Masad et al [7] noted that the steel slag has the stronger bonding strength with asphalt binder in comparison to natural aggregates.…”

Section: Introductionmentioning

confidence: 99%

Study of Toxicity Assessment of Heavy Metals from Steel Slag and Its Asphalt Mixture

Xie

et al. 2020

Materials

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Steel slag has been used widely as an aggregate in road application, but it could pose a contamination risk for the environment due to considerable heavy metals (HMs). To explore the leaching behavior and contamination risk of HMs from steel slag and its asphalt mixture is of great significance. In this study, the physical-chemical features, batch leaching test and semi-dynamic test were conducted to determine the mobility capability and leaching characteristics of HMs. The results show that steel slag presents a low pollution risk in short-term leaching, whereas the cumulative release mass of Cd, Ni, As and Pb are more than or approach the limits, which indicates that steel slag exhibits environment impacts to a certain extent. Steel slag covered with asphalt binder results in As and Cu reduced by 3.64% and 4.83%. Diffusion is the main controlling mechanism of HMs in asphalt mixture and the mobility capability of most HMs were classed as “low mobility” (LI > 8). Asphalt stripping off can aggravate the release potential of HMs from asphalt mixture, but the pollution risk remains controllable.

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Section: Introductionmentioning

confidence: 99%

Study of Toxicity Assessment of Heavy Metals from Steel Slag and Its Asphalt Mixture

Xie

et al. 2020

Materials

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“…Due to its good driving comfort, fast construction speed, convenient maintenance, and easy recycling, asphalt pavement prevails in highway engineering [ 1 , 2 ]. The Chinese government has been committed to developing fully the transportation industry in the past few decades.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture

et al. 2018

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Diatomite is an inorganic natural resource in large reserve. This study consists of two phases to evaluate the effects of diatomite on asphalt mixtures. In the first phase, we characterized the diatomite in terms of mineralogical properties, chemical compositions, particle size distribution, mesoporous distribution, morphology, and IR spectra. In the second phase, road performances, referring to the permanent deformation, crack, fatigue, and moisture resistance, of asphalt mixtures with diatomite were investigated. The characterization of diatomite exhibits that it is a porous material with high SiO2 content and large specific surface area. It contributes to asphalt absorption and therefore leads to bonding enhancement between asphalt and aggregate. However, physical absorption instead of chemical reaction occurs according to the results of FTIR. The resistance of asphalt mixtures with diatomite to permanent deformation and moisture are superior to those of the control mixtures. But, the addition of diatomite does not help to improve the crack and fatigue resistance of asphalt mixture.

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“…Chen et al [81] estimated the skid resistance of SMA mixtures with different BOF steel size by the BPN test. In the BOF slag coarse aggregates (BSCA), content with the size of 9.5-16 mm, 4.75-9.5 mm, 4.75-16 mm accounted for 45%, 29% and 16% of the total volume of the mineral mixture, respectively.…”

Section: Macro Performance Anti-slidingmentioning

confidence: 99%

Research Progress on Skid Resistance of Basic Oxygen Furnace (BOF) Slag Asphalt Mixtures

Xiong

Zhai

et al. 2020

Materials

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In order to ensure the safety of traffic, asphalt pavement is commonly required to utilize aggregates with excellent anti-abrasion property. This results in the lack of high-quality aggregates. The incorporation of solid waste in the aggregates is regarded as a high potential alternative for solving this problem. Since its material properties, such as rough surface, high Polished Stone Value (PSV) and the excellent adhesion property of asphalt, Basic Oxygen Furnace (BOF) slag can effectively improve the skid resistance of asphalt mixtures. First, the material properties of BOF slag are reviewed in this study. Then, the skid resistance of asphalt mixtures and aggregates are commendably evaluated by the Polished Stone Value test, Wehner/Schulze Tester, Aachen Polishing Machine, British Pendulum Test and Sand Patch test. The physical and mechanical properties of BOF slag play a key role in asphalt mixtures. This review found that the skid resistance mechanism of the BOF slag asphalt mixture is governed by factors such as BOF slag properties, incorporation methods and gradation types. Finally, the economic and environmental benefits of BOF slag asphalt mixtures were discussed. In addition, the function of gas catalysis and the melting of ice and snow can be added to the BOF slag asphalt mixture for a cleaner development in engineering. Furthermore, the existing problems, research directions and corresponding measures in this field are directed towards more durable and functional asphalt pavement construction.

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Function Investigation of Stone Mastic Asphalt (SMA) Mixture Partly Containing Basic Oxygen Furnace (BOF) Slag

Abstract: These conclusions would benefit the future extensive utilization of BSCA in asphalt pavement.

Cited by 7 publications

References 17 publications

Study of Toxicity Assessment of Heavy Metals from Steel Slag and Its Asphalt Mixture

Study of Toxicity Assessment of Heavy Metals from Steel Slag and Its Asphalt Mixture

Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture

Research Progress on Skid Resistance of Basic Oxygen Furnace (BOF) Slag Asphalt Mixtures

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