Review and environmental impact assessment of green technologies for base courses in bituminous pavements

Anthonissen, Joke; Bergh, Wim van den; Braet, Johan

doi:10.1016/j.eiar.2016.04.005

Cited by 68 publications

(50 citation statements)

References 43 publications

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“…The software and databases utilized were Gabi ts, by Thinkstep-a Sphera company-and Gabi Professional and Ecoinvent 3, respectively. The data for the completion of the LCA was secondary data, acquired by EPDs, PCRs and reputable literature sources [46][47][48][49]. The goal of the study is to quantify the environmental impacts of the predefined asphalt mixtures following a "cradle-to-gate" approach, to normalize and weight them, for use in the quantification of the ESC i .…”

Section: Definition Of the Case Studymentioning

confidence: 99%

Integrating Circularity in the Sustainability Assessment of Asphalt Mixtures

Mantalovas

Mino

2020

Sustainability

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Rising concerns about the impacts that the road engineering industry is imposing to the environment have redirected national road authorities to firmly re-consider the sustainability implications of their operations. Lately, though, sustainability has established a forceful correlation with the Circular Economy and its principles. The road engineering industry, therefore, is moving towards more circular approaches. However, this is occurring without the assessment of the potential impacts of such a transition. For this reason, in this study, a composite indicator, namely, Environmental Sustainability and Circularity indicator (ESCi), for investigating the potential effects that increased circularity could have at the environmental sustainability of asphalt mixtures is developed. It can be utilized as a decision-making support tool from stakeholders involved in both asphalt mixture production and road pavement management. In addition, in this study, four asphalt mixtures with different percentages of Reclaimed Asphalt (RA) were assessed in terms of their “cradle-to-gate” environmental impacts and circularity, by means of Life Cycle Assessment, and Material Circularity Index, respectively. Their fatigue and permanent deformation performances play a key role in the assessment and distinctive results obtained for the asphalt mixtures with increasing RA% and thus, significant environmental benefits and increased circularity are observed after specific RA% thresholds.

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Section: Definition Of the Case Studymentioning

confidence: 99%

Integrating Circularity in the Sustainability Assessment of Asphalt Mixtures

Mantalovas

Mino

2020

Sustainability

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“…The comparison between GHG emissions for Therefore, using this approach, the better control of RAP moisture content can be achieved. A study reported an increase in energy consumption up to 14% and 17% could be observed when 15-30% and more than 45% RAP, respectively, were used in new asphalt mixtures [73]. However, the other studies stated that producing asphalt binder consumes 3,110,090 MJ of energy and releases of 226,870 kg of GHG and replacing 50% of RAP as binder replacement can result in 17-28% reduction of energy consumption as well as emissions [74,75].…”

Section: Environmental Evaluationmentioning

confidence: 99%

Sustainability Assessment of Green Asphalt Mixtures: A Review

Pouranian

Shishehbor

2019

Environments

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During recent decade, the pavement sustainability has received much attention by road agencies, companies, governments and research institutes. The aim of this paper is to introduce and evaluate the sustainability of the technologies developed or underdeveloped to address environmental issues of asphalt mixtures, and the waste materials and by-products that can be recycled and reused in asphalt production. Warm Mix Asphalt (WMA) technology, the most popular waste materials to substitute neat binder (crumb rubber modifier (CRM), recycled plastic (RP), vacuum tower bottoms (VTB)) and/or virgin aggregates (reclaimed asphalt pavement (RAP), reclaimed asphalt shingles (RAs), construction and demolition (C and D) wastes, steel and copper slags), and bio-binders were evaluated with respect to their environmental and economic benefits and engineering performance as the main components of pavement sustainability. The performance evaluation was carried out by examining rutting, moisture susceptibility, thermal and fatigue cracking resistance. Two main environmental impacts, greenhouse gas (GHG) emission, and energy consumption were considered to study the environmental effects of these technologies and materials. Additionally, the economic effect was investigated considering initial cost and long-term benefit. Results of investigation illustrated that although each individual technology and waste material is valuable in terms of performance and/or the environment, specific combinations such as WMA + RAP, WMA + CRM, RAP + CRM, and WMA + CRM + RAP lead to further benefits. Notably, these combinations suffer from a lack of comprehensive economic analysis, thus, their sustainability cannot be fully assessed and is prone to future studies.

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“…RAP is reused at an impeccable 100% rate in Denmark and Sweden [9]. However, Flemish road standard SB250 in Belgium disallows the use of RAP in the surface course of road pavement because of the environmental impact of potential leachates [11]. The incorporation of RAP as an alternative material in asphalt base and sub-base layer construction offers the potential for reducing global warming (20%), energy consumption (16%), water consumption (11%), life cycle costs (21%) and hazardous waste generation (11%) [12].…”

Section: Recycled Asphalt Pavementmentioning

confidence: 99%

Evaluation of Performance and Challenges of Use of Waste Materials in Pavement Construction: A Critical Review

Jamshidi

White

2019

Applied Sciences

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Paved surfaces must reliably bear heavy loads, often under challenging environmental and geotechnical conditions. These requirements are addressed through the use of high-quality, newly produced materials in pavement design. However, in remote locations, newly produced materials are often expensive or unavailable, making waste or alternative materials more attractive. Waste materials can be used in their natural condition but are more commonly stabilised or otherwise improved to meet performance targets. However, this practice can incorporate unwarranted risk into pavement design solutions. The decision to use waste materials in a pavement is a balance between technical risk, maintenance liability, available materials, environmental emissions and capital cost. This study reviews the use of waste materials in pavement design and construction. Reclaimed asphalt pavement (RAP) materials and processed waste plastic for pavement construction are considered. Additionally, blast furnace slag (BFS) and waste glass in pavement construction are evaluated. This review focuses on the effects of alternative materials on the properties of asphalt pavement. The results indicate that RAP is acceptable as an alternative material, while BFS, waste plastic and waste glass can be used under specific conditions. Also, the current and future challenges for the use of waste materials in the pavement industry are discussed.

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Review and environmental impact assessment of green technologies for base courses in bituminous pavements

Cited by 68 publications

References 43 publications

Integrating Circularity in the Sustainability Assessment of Asphalt Mixtures

Integrating Circularity in the Sustainability Assessment of Asphalt Mixtures

Sustainability Assessment of Green Asphalt Mixtures: A Review

Evaluation of Performance and Challenges of Use of Waste Materials in Pavement Construction: A Critical Review

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