Analysis of Life Cycle Environmental Impact of Recycled Aggregate

Park, Won-Jun; Kim, Taehyoung; Roh, Seungjun; Kim, Rakhyun

doi:10.3390/app9051021

Cited by 42 publications

(20 citation statements)

References 26 publications

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“…LCA methodology is often used for the environmental assessment and comparison of aggregate (natural and recycled aggregate) and concrete (ordinary concrete and recycled aggregate concrete). Many comparative studies using this methodology have been published [4,8,13,16,20,23,24,60,[73][74][75][76][77][78][79][80][81][82][83][84][85][86].…”

Section: Environmental Assessment Methodologymentioning

confidence: 99%

“…Research has been published on the environmental assessment of recycled aggregate concrete (RAC) for structural use and its comparison with natural aggregate concrete (NAC) [4,6,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The comparison of the environmental impacts of RA with NA production for the production of lower-grade concrete products was studied [15].…”

Section: Literature Review Of the Environmental Assessment Of Recyclementioning

confidence: 99%

See 1 more Smart Citation

Environmental Assessment of Two Use Cycles of Recycled Aggregate Concrete

Pavlů¹,

Kočí

Hájek³

2019

Sustainability

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The main goal of this study was to compare two use cycles of natural aggregate concrete and recycled aggregate concrete, which is another way to compare the environmental impacts of recycled materials. A series of concrete mixtures with various replacement ratios of primary resources with recycled ones were prepared for this study. The mechanical properties of concrete mixtures were examined and were used for the design of structural elements in the same utilized properties. The two use cycles of a structural element were compared using life cycle assessment (LCA). In the first use cycle, the LCA of the structural element containing only primary raw materials was assessed. In the second use cycle, the LCA of a structural element in which primary materials were partially replaced by recycled ones was assessed. The obtained results confirm the potential use of high-quality recycled aggregate originating from local sources in some applications in building structures. Furthermore, the environmental assessment indicates the benefits of using recycled materials, such as environmental savings, especially the reduction of primary resource use, embodied energy, and embodied emissions, as well as reduction of the pressure on landfill sites.

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Section: Environmental Assessment Methodologymentioning

confidence: 99%

Section: Literature Review Of the Environmental Assessment Of Recyclementioning

confidence: 99%

Environmental Assessment of Two Use Cycles of Recycled Aggregate Concrete

Pavlů¹,

Kočí

Hájek³

2019

Sustainability

View full text Add to dashboard Cite

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“…[20] claimed that it would be premature to make any claims on the environmental benefits of a particular product or manufacturing process without first considering its consequences in a life cycle context. LCA methodology includes the establishment of an inventory of all types of emissions and waste products [21,22]. LCA studies are conducted in accordance with the specification and standards of the International Organization for Standardization (ISO).…”

Section: Life Cycle Assessmentmentioning

confidence: 99%

Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures

2019

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To combat the rutting effect and other distresses in asphalt concrete pavement, certain modifiers and additives have been developed to modify the asphalt mixture to improve its performance. Although few additives exist, nanomaterials have recently attracted significant attention from the pavement industry. Several experimental studies have shown that the use of nanomaterials to modify asphalt binder results in an improved oxidative aging property, increased resistance to the rutting effect, and improves the rheological properties of the asphalt mixture. However, despite the numerous benefits of using nanomaterials in asphalt binders and materials, there are various uncertainties regarding the environmental impacts of nano-modified asphalt mixtures (NMAM). Therefore, this study assessed a Nano-Silica-Modified Asphalt Mixtures in terms of materials production emissions through the Life Cycle Assessment methodology (LCA), and the results were compared to a conventional asphalt mixture to understand the impact contribution of nano-silica in asphalt mixtures. To be able to compare the relative significance of each impact category, the normalized score for each impact category was calculated using the impact scores and the normalization factors. The results showed that NMAM had a global warming potential of 7.44563 × 103 kg CO2-Eq per functional unit (FU) compared to 7.41900 × 103 kg CO2-Eq per functional unit of the conventional asphalt mixture. The application of LCA to NMAM has the potential to guide decision-makers on the selection of pavement modification additives to realize the benefits of using nanomaterials in pavements while avoiding potential environmental risks.

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“…Park et al [12] performed an analysis of the life-cycle environmental impact of recycled aggregate. The environmental impact of recycled aggregate (wet) was up to 16-40% higher than that of recycled aggregate (dry), mostly due to the amount of energy used by impact crushers.…”

Section: Life Cycle Assessment Of Recycled Aggregate Concretementioning

confidence: 99%