An investigation on the use of lean asphalt as an alternative base material in asphalt pavements by means of laboratory testing, life cycle assessment, and life cycle cost analysis

Moins, Ben; Beck, Cedric; Hernando, David; Bergh, Wim van den; Audenaert, Amaryllis

doi:10.1016/j.resconrec.2023.106992

Cited by 10 publications

(2 citation statements)

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“…Vesicular volcanic aggregates, due to their high porosity, require longer heating time to completely dry out their moisture, which means an additional 0.7 L of fuel per metric ton for each increase by 1% in moisture, consuming 5.1 L of additional fuel per metric ton compared to mixtures with conventional low-porosity aggregates. A conventional asphalt concrete mixture with neat bitumen 35/50 and limestone aggregate involves approximately 271.1 MJ/metric ton of fuel (natural gas) [38]. Assuming the linear relationship between energy consumption and manufacturing temperature above the water vaporization temperature (Figure 8a), the RHMA mixture accounts for an increase in fuel consumption of 7.1% over the HMA.…”

Section: Energy Consumptionmentioning

confidence: 99%

“…compared to mixtures with conventional low-porosity aggregates. A conventional asphalt concrete mixture with neat bitumen 35/50 and limestone aggregate involves approximately 271.1 MJ/metric ton of fuel (natural gas) [38]. Assuming the linear relationship between energy consumption and manufacturing temperature above the water vaporization temperature (Figure 8a), the RHMA mixture accounts for an increase in fuel consumption of 7.1% over the HMA.…”

Section: Energy Consumptionmentioning

confidence: 99%

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Sustainable Pavement Construction in Sensitive Environments: Low-Energy Asphalt with Local Waste Materials and Geomaterials

Franesqui,

Yepes,

Valencia-Díaz

2024

Buildings

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Low-energy asphalt techniques, such as warm mix asphalt (WMA), combined with the rational consumption of geomaterials and waste recycling would promote more sustainable and energy-efficient asphalt pavements. In volcanic environments, a significant proportion of aggregate production is discarded due to its extreme porosity, and used tires generate a main environmental issue as well. While recycled rubber powder from tire waste can enhance the mechanical behavior of asphalt, it also raises its viscosity. Therefore, joining rubberized asphalt containing local waste geomaterials with WMA technologies is crucial to reduce the manufacturing temperatures and emissions and to produce more eco-efficient pavements. For this purpose, the most relevant technological characteristics of rubberized warm mix asphalt with residual aggregates from highly vesiculated volcanic rocks are tested in the laboratory and contrasted with conventional mixtures. The outcomes demonstrate not only the feasibility of the production of such mixtures in line with the current specifications, but also show a significant improvement in the resistance to moisture and to plastic deformations, and an improvement in the stiffness modulus. The eco-efficiency indicators conclude that the energy consumption and emissions are reduced by 9%, enabling the reuse of waste materials by more than 95%.

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Section: Energy Consumptionmentioning

confidence: 99%

Section: Energy Consumptionmentioning

confidence: 99%