Effect of Warm Mix Chemical Additives on the Binder-Aggregate Bond Strength and High-Service Temperature Performance of Asphalt Mixes Containing Electric Arc Furnace Steel Slag

Pasetto, Marco; Giacomello, Giovanni; Pasquini, Emiliano; Canestrari, Francesco

doi:10.1007/978-94-017-7342-3_39

Cited by 7 publications

(10 citation statements)

References 21 publications

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“…Hesami et al (2014) in a complete study on bituminous mixes with slag aggregates and their moisture susceptibility, demonstrated that slag used as sand degraded the water sensitivity. Similar results were found by Pasetto et al (2016). Conversely, the moisture resistance of coarse aggregate slag mixtures was very high (Ameri et al, 2013;Hesami et al, 2014).…”

Section: Moisture Sensitivitysupporting

confidence: 85%

The use of electric arc furnace slag in bituminous pavements

Skaf¹,

Manso²,

Chica³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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Electric Arc Furnace (EAF) slag, a waste stream in the production of carbon steel, has interesting and extensively researched mechanical properties as an aggregate in asphalt mixes. In this paper, an exhaustive review is conducted of its main features, the problematic aspects of its use, and the main properties of the mixes prepared with this aggregate, such as mechanical behaviour, resistance to fatigue and permanent deformation, water sensitivity and skid resistance. Based on the literature review and own experience, the conclusion is that the use of EAF slag is generally recommended in partial replacement of the coarse aggregate, in all types of asphalt mixtures, following suitable pre-treatment. This usage improves mechanical performance, durability and long-term sustainability of the bituminous mixtures. Moreover, resistance against slipping and skidding on EAF slag pavements is an important safety-related aspect that makes them especially suitable for rainy regions.

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Section: Moisture Sensitivitysupporting

confidence: 85%

The use of electric arc furnace slag in bituminous pavements

Skaf¹,

Manso²,

Chica³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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“…The influence of the warm additive on the nonrecoverable creep compliance seems negligible for all binders and mastics (except for the positive effect in the case of mastics containing steel slag at lower test temperature) suggesting that, according to previous research findings [7,8,33], such additive should not compromise rutting resistance with respect to the corresponding traditional hot material. On the other hand, the stiffening effect due to the addition of fillers, leading to the reduction of the rutting potential of mixtures, is clearly demonstrated by the sensibly reduced nr at all test temperatures with respect to the corresponding bitumens.…”

Section: High Service Temperature Behaviourmentioning

confidence: 59%

“…An additive dosage of 0.5% by weight of binder was selected to obtain the warm binder as recommended by the producer and according to the study on mixtures [33]. The warm binder was produced in the laboratory using a portable mixer operating at high stirring rates blending the prefixed amount of liquid additive and the hot plain binder (150 ∘ C).…”

Section: Methodsmentioning

confidence: 99%

“…To accomplish this objective, two bitumens and four mastics of different nature and composition were studied at unaged and long-term aged conditions through a dynamic shear rheometer (DSR). Such a study is a part of a wider research project aimed at assessing the feasibility of using EAF steel slag in WMA taking into account workability, mechanical properties, and durability of binders, mastics, and mixtures [33].…”

Section: Introductionmentioning

confidence: 99%

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Rheological Characterization of Warm-Modified Asphalt Mastics Containing Electric Arc Furnace Steel Slags

Pasetto

Baliello

Giacomello

et al. 2016

Advances in Materials Science and Engineering

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The environmental sustainability of road materials and technologies plays a key role in pavement engineering. In this sense, the use of Warm Mix Asphalt (WMA), that is, a modified asphalt concrete that can be produced and applied at lower temperature, is considered an effective solution leading to environmental and operational benefits. The environmental sustainability of WMA can be further enhanced with the inclusion of steel slag in partial substitution of natural aggregates. Nevertheless, such innovative material applied at lower temperatures containing warm additives and steel slag should be able to guarantee at least the same performance of traditional hot mix asphalts, thus assuring acceptable mechanical properties and durability. Therefore, the purpose of this study is to investigate the rheological behaviour of bituminous mastics obtained combining a warm-modified binder and a filler (material passing to 0.063 mm) coming from electric arc furnace steel slag. To evaluate the influence of both warm additive and steel slag, a plain binder and limestone filler were also used for comparison purposes. Complex modulus and permanent deformation resistance of bitumens and mastics were assessed using a dynamic shear rheometer. Experimental results showed that steel slag warm mastics assure enhanced performance demonstrating promising applicability.

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“…In this sense, the replacement of virgin and recycled aggregates with steel slag is gaining momentum and strength as a way to improve some thermal and mechanical properties further (e.g., cohesion strength, stiffness, dynamic modulus, fatigue, and rutting) [56][57][58][59][60], likely due to its excellent roughness, shape, angularity, hardness, morphological, physical, polishing, and wear resistance [53]. Nonetheless, the results reported by other researchers are less conclusive, in the sense that steel slag mixtures exhibited lower mechanical performance (e.g., rutting performance) [58,61] and higher binder consumption [58,62] caused by the aggregate particle size and aggregate-type [63]. Therefore, many of the studies found in the literature review have focused on the heating and healing of mixtures containing only virgin (i.e., aggregates or fresh bitumen) and steel slag aggregates.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment

Lizárraga

Gallego

2020

Materials

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Nowadays, the self-healing of asphalt pavements promoted by microwave radiation heating energy is gaining attention and strength in the scientific community. However, most of these studies are only conceptual and, thus, remain shrouded in uncertainty regarding technology development, economy, and application effect. Therefore, there are several efforts underway to offer more effective assisted healing treatments that are capable of overcoming such uncertainties. This paper aims to assess and quantify the healing performance rates (HR) of half-warm recycled asphalt (HWRA) mixtures containing electric arc furnace (EAF) slag and total recycled asphalt pavement (RAP) rates. To this end, a novel assisted thermomechanical healing treatment (i.e., a recompaction-based technique and microwave heating energy) was put forward to promote the potential healing effect of this treatment on the mechanical properties of the asphalt mixtures. In order to do this, three microwave heating temperatures (25 °C, 60 °C, and 80 °C) and three mechanical recompaction levels (0, 25, and 50 gyrations) were selected. After that, the healing performance rates (%, HR) of the asphalt mixtures were calculated by repeated indirect tensile strength (ITS) and indirect tensile stiffness modulus (ITSM). The results indicated that the 8% EAF slag mixture was found to provide significant microwave heating energy savings by up to 69% compared with the benchmark 100% RAP mixture, and, at the same time, it experienced a remarkable stiffness recovery response of 140% of the initial mechanical properties. These findings encourage greater confidence in promoting this innovative thermomechanical-based healing treatment for in-situ surface course asphalt mixtures of road pavements.

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Effect of Warm Mix Chemical Additives on the Binder-Aggregate Bond Strength and High-Service Temperature Performance of Asphalt Mixes Containing Electric Arc Furnace Steel Slag

Cited by 7 publications

References 21 publications

The use of electric arc furnace slag in bituminous pavements

The use of electric arc furnace slag in bituminous pavements

Rheological Characterization of Warm-Modified Asphalt Mastics Containing Electric Arc Furnace Steel Slags

Self-Healing Analysis of Half-Warm Asphalt Mixes Containing Electric Arc Furnace (EAF) Slag and Reclaimed Asphalt Pavement (RAP) Using a Novel Thermomechanical Healing Treatment

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