Modeling and performance evaluation of asphalt mixtures and aggregate bases containing steel slag

Shiha, Mohamed; El-Badawy, Sherif M.; Gabr, Alaa R.

doi:10.1016/j.conbuildmat.2020.118710

Cited by 25 publications

(5 citation statements)

References 12 publications

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“…More recently, this material has been studied as an alternative aggregate for railway ballast, demonstrating enhanced performance under the higher loads of heavy-haul trains [2]. This is in agreement with other studies, including both experimental evaluations and numerical modelling of the performance of coarse unbound materials containing steel slag [3,4].…”

Section: Introductionsupporting

confidence: 87%

Mechanical Behaviour of Steel Slag–Rubber Mixtures: Laboratory Assessment

et al. 2023

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Slags and rubber from end-of-life tires represent a liability to the steel and tire industry, causing economic and environmental problems that are difficult to manage. Transport infrastructures can use these industrial by-products instead of extracting natural raw materials, but the adequate mechanical performance of the materials needs to be assured. This paper addresses the mechanical behaviour of slag–rubber mixtures in the laboratory with CBR, monotonic and cyclic triaxial tests. In addition, light falling weight deflectometer tests were also performed in a physical model. The results were analysed to meet technical specifications from Brazil, Portugal and Australia using railway sub-ballast layers, capping layers or road pavement layers as the base and sub-base to identify the applicability range of slag–rubber mixtures for transport infrastructures. Concerning the analysed parameters, it was demonstrated that slag–rubber mixtures can show resilient behaviour and strength adequate for the support layers of transport infrastructures provided that the rubber content is below 5% in weight and that the slag is milled to comply with the grain size distribution ranges available in the technical specifications of the cited countries.

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Section: Introductionsupporting

confidence: 87%

Mechanical Behaviour of Steel Slag–Rubber Mixtures: Laboratory Assessment

et al. 2023

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“…Research results verified that the mechanical performance of steel slags asphalt mixtures displayed better workability, stiffness, and resistance to moisture damage, fatigue cracking, and permanent deformation [24,25]. en, compared with traditional asphalt mixture, asphalt mixture incorporating steel slag owned better pavement performance besides environmental friendliness [26][27][28]. One concern was considered; the volume stability of steel slag would weaken its performance, while previous studies had concluded that steel slag exhibited fine volume stability due to its lower expansion rate meeting the specification requirements [29][30][31].…”

Section: Introductionmentioning

confidence: 60%

Investigation of Permanent Deformation Behavior of Steel Slag Asphalt Mixture under Indoor Simulation

Wei

Yang

Xie

et al. 2021

Advances in Civil Engineering

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Previous studies have indicated that steel slag can be used as a substitute for natural aggregates in asphalt mixture, while little attention has been paid to systematic investigation of the influences of various external environmental factors on deformation resistance of steel slag asphalt mixture. In order to understand the service behavior of steel slag asphalt mixture, its permanent deformation under different condition was investigated based on an indoor simulation test. The chemical composition, microscopic structure, surface texture, and volume stability of steel slag were firstly characterized. The uniaxial repeated loading test and standard wheel-tracking test were applied to evaluate the effect of temperature, stress levels, and water damage on the permanent deformation of AC-16 and AC-20 steel slag asphalt mixtures. The results indicate that a higher content of alkaline oxide and high-grade texture index existing in steel slag contribute to its strong absorptivity and adhesion of asphalt. The steel slag demonstrates fine volume stability due to its lower free-CaO (f-CaO) content, autoclave chalked ratio, and immersion expansion ratio. The permanent deformation of steel slag asphalt mixtures increases rapidly under higher stress and temperatures in contrast to lower increment at lower stress and temperatures. Asphalt mixtures at higher stress and higher temperatures and water condition exhibit larger rutting deformation and inferior rutting resistance. AC-16 steel slag asphalt mixture has superior resistance to permanent deformation than AC-20 asphalt mixture. Rutting factors show different degrees of impact in a decreasing order of temperature, water damage, and stress levels. The findings have significant implications for providing a theoretical basis for reusing steel slag in pavement construction and facilitating engineering application of steel slag asphalt mixture.

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“…En Colombia, el uso de sobrantes industriales en distintos procesos debe centrarse en el desarrollo eco amigable al ambiente, se usa así escoria de acero como agregado grueso para fabricar mezclas calientes de asfalto (López-Díaz, Ochoa-Díaz, y Grimaldo-León, 2018). Estos materiales poseen propiedades químicas y físicas aptos para ser usados en rehabilitación de carreteras (Rondón-Quintana, Muniz-De-Farias, y Reyes-Lizcano, 2018), pues el riesgo ambiental que genera el depósito de escoria de acero en vertederos conlleva a su uso como agregado grueso en las mezclas asfálticas calientes (Shiha, El-Badawy, y Gabr, 2020).…”

Section: Introductionunclassified

Estabilidad y flujo de mezclas asfálticas en caliente incorporando escorias de acero

Herrera

Pérez

2022

Infraestructura Vial

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La presente investigación se basó en la innovación y elaboración de una mezcla asfáltica en caliente (MAC), debido al deterioro prematuro de los pavimentos flexibles, y poca capacidad de cumplir con su vida útil. He aquí la necesidad de asegurar una buena calidad de materiales para la mezcla asfáltica y una búsqueda de nuevo material que sea capaz de dar mayor durabilidad y evitar un prematuro deterioro del pavimento. Se evaluó así la incorporación de escoria de acero para el diseño de MAC, con el objetivo de determinar la estabilidad y flujo de la mezcla asfáltica en caliente incorporando escorias de acero. Para esto, se empleó la metodología Marshall con un porcentaje de escoria de acero respecto al agregado grueso en 0% - 15% - 25% - 50% - 75%. Los resultados obtenidos, en cuanto a calidad de los agregados, cumplieron con los estándares de calidad. Se concluyó que la mezcla asfáltica modificada con la escoria de acero al 15% es la mejor combinación, de igual forma, este porcentaje cumple para tránsito liviano, mediano, al 25% - 50% - 75% solo cumplen para transito liviano. Se logró aumentar la estabilidad y flujo de la mezcla asfáltica al incorporar hasta un máximo de 25% para una MAC respecto a la mezcla de control.

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Modeling and performance evaluation of asphalt mixtures and aggregate bases containing steel slag

Cited by 25 publications

References 12 publications

Mechanical Behaviour of Steel Slag–Rubber Mixtures: Laboratory Assessment

Mechanical Behaviour of Steel Slag–Rubber Mixtures: Laboratory Assessment

Investigation of Permanent Deformation Behavior of Steel Slag Asphalt Mixture under Indoor Simulation

Estabilidad y flujo de mezclas asfálticas en caliente incorporando escorias de acero

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