Investigation on the Influence of Air Voids and Active Filler on the Mechanical Response of Bitumen Stabilized Material

Nivedya, M. K.; Veeraragavan, A.; Ravindran, Parag; Krishnan, J. Murali

doi:10.1061/(asce)mt.1943-5533.0001967

Cited by 12 publications

(6 citation statements)

References 18 publications

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“…However, 12.5% of IoT reduced the production cost of the asphalt mixture per kilometer of highway. (7) The asphalt mixture with 12.5% IoT was the most circular among the mixtures analyzed. Conversely, asphalt mixtures with 7.5% and 10% of IoT showed zero circularity, not showing environmental viability.…”

Section: Discussionmentioning

confidence: 95%

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Viability of Asphalt Mixtures with Iron Ore Tailings as a Partial Substitute for Fine Aggregate

de Moraes,

Neto,

Lucena

et al. 2023

Transportation Research Record: Journal of the Transportation R

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Dark colors aggravate the absorption and accumulation of heat in urban centers in the layers of asphalt coating. These problems can be minimized by incorporating materials that increase the albedo on these pavements. The use of waste in the industry has been encouraged, and an alternative is iron ore tailing (IoT), whose material comes from processing iron ore. The circular economy encourages a change in waste disposal after project decommissioning, encouraging the transformation, reuse, and recycling of waste. Therefore, this research investigated the influence of percentages of IoT in the contents (7.5%, 10.0%, and 12.5%) as a substitute for fine natural aggregate on hot asphalt mixtures’ mechanical and thermal performance. The statistical variance test (ANOVA) was used to validate the obtained data. An economic analysis concerning the costs of production and recovery of asphalt mixtures was carried out using the Present Net Value. Asphalt mixtures with IoT were evaluated with regard to the environmental aspect using the circularity index. Among the asphalt mixtures analyzed, the one produced with 12.5% was the most viable. The results showed a gain in mechanical performance concerning tensile strength, resilient modulus, fatigue, and permanent deformation of this mixture, as well as a reduction in production costs per kilometer of highway. The use of 12.5% provided a greater circularity and a reduction of the surface temperature of the pavement by 2.9°C. IoT is viable in constructing highways close to places that produce iron ore.

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Section: Discussionmentioning

confidence: 95%

“…Thus, one solution is to reduce heat absorption by the asphalt layer through the use of colored asphalt mixtures, reducing urban temperatures in addition to improving the appearance of the urban landscape ( 5 ). Furthermore, using highly reflective materials in urban structures decreases the absorbed solar radiation and helps mitigate the UHI ( 6 , 7 ).…”

mentioning

confidence: 99%

Viability of Asphalt Mixtures with Iron Ore Tailings as a Partial Substitute for Fine Aggregate

de Moraes,

Neto,

Lucena

et al. 2023

Transportation Research Record: Journal of the Transportation R

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“…with the goal of better understanding the curing mechanism, in which water evaporates and the final mix gains stiffness and strength during its service life (FU et al, 2010;GODENZONI et al, 2017 GODENZONI et al, 2017;NIVEDYA et al, 2018).…”

Section: Problem Identificationmentioning

confidence: 99%

“…On the other hand, if CRAM is considered as a bound-like material with viscoelastic properties that resemble the behavior of an HMA, then permanent deformation and fatigue cracking might be the distress modes (NIVEDYA et al, 2018). Thus, the CRAM mechanical behavior is dependent of several factors that are not fully understood, as they are highly dependent on the CRAM composition, as already described in Chapter for construction purposes, the stabilized material after compaction presents similar void content in comparison with a conventional granular one; therefore, it should also be treated as granular, but with higher cohesion.…”

Section: Influence Of Viscoelastic Properties Of Cold Recycledmentioning

confidence: 99%

“…Some researchers consider that CRAM resemble a granular material, with stress-state dependency HARVEY, 2007;GUATIMOSIM, 2015). In contrast, others state that CRAMs are temperature and load frequency dependent, exhibiting viscoelastic properties (DIEFENDERFER et al, 2016;GODENZONI et al, 2017;NIVEDYA et al, 2018). Others researchers even consider that this mixture is influenced by the stress-state, temperature, and load frequency, presenting a visco-elasto-plastic behavior (JENKINS;YU, 2009;JENKINS, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Mechanical behavior of cold recycled asphalt mixtures.

Kuchiishi¹

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The Brazilian reduced paved road density, the increasingly demand for highways, and the lack of investment in preventive maintenance practices accelerate the occurrence of pavement distresses. This imparts for poor riding quality highways, resulting in higher fuel consumption, greater emission of pollutant gases, and increasing operational costs. In this scenario, cold recycling practices may be a cost-effective and environmental friendly alternative for pavement rehabilitation. The cold recycled asphalt mixtures (CRAMs) produced by cold recycling techniques, are comprised by reclaimed asphalt pavement (RAP), bitumen stabilized agents (asphalt emulsion or foamed asphalt), and active fillers (cement or hydrated lime). Despite the economical and sustainable benefits, the CRAMs exhibit a complex mechanical behavior since numerous variables can influence its stiffness. Therefore, the purpose of this study is to evaluate the CRAM' stiffness dependency regarding temperature, load frequency, stress-state and moisture content variation. Four types of CRAMs were collected from the field during experimental test section construction and were evaluated by means of laboratory tests. For temperature evaluation, the CRAMs linear viscoelastic properties were investigated by means of dynamic modulus and the results were used as input data for computational simulation. It was observed that the CRAMs viscoelastic properties influence the pavement mechanical response. For moisture evaluation, triaxial resilient modulus tests were conducted at different curing conditions. In conjunction with the filter paper test and X-ray micro computed tomography, a correspondence was observed between matric suction and resilient modulus. Besides, the CRAMs stress-state dependency was evaluated by means of pavement simulation and compared with in situ measurements. It was observed that the non-linear elastic behavior of CRAMs substantially influences the pavement mechanical behavior.

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Effects of using waste high-density polyethylene on the rheological, mechanical, and thermal performance of asphalt materials

Silva

Lucena

Neto

et al. 2023

Environ Dev Sustain

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Investigation on the Influence of Air Voids and Active Filler on the Mechanical Response of Bitumen Stabilized Material

Cited by 12 publications

References 18 publications

Viability of Asphalt Mixtures with Iron Ore Tailings as a Partial Substitute for Fine Aggregate

Viability of Asphalt Mixtures with Iron Ore Tailings as a Partial Substitute for Fine Aggregate

Mechanical behavior of cold recycled asphalt mixtures.

Effects of using waste high-density polyethylene on the rheological, mechanical, and thermal performance of asphalt materials

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