Comparative LCA of recycled and natural aggregate concrete using Particle Packing Method and conventional method of design mix

Pradhan, Subhasis; Tiwari, Bikash Ranjan; Kumar, Shailendra; Barai, Sudhirkumar V.

doi:10.1016/j.jclepro.2019.04.328

Cited by 110 publications

(35 citation statements)

References 31 publications

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“…Eleven impact categories (termed as impact indicators from here on) within CML-baseline method have been studied ( Acero et al., 2016 ; Pradhan et al., 2019 ). The CML-baseline standardized categories are as follows: Ozone Layer Depletion Potential (ODP), Abiotic Depletion, Fresh Water Aquatic Ecotoxicity (FWAET), Photochemical Oxidation, Terrestrial Acidification Potential (TAP), Marine aquatic ecotoxicity (MAETP), Fossil Fuels Abiotic depletion (FDP), Global Warming Potential (GWP), Terrestrial ecotoxicity (TETP), Human Toxicity Potential (HTP) and Eutrophication.…”

Section: Methodsmentioning

confidence: 99%

Comparative life cycle assessment of high performance lithium-sulfur battery cathodes

López

Akizu‐Gardoki

Lizundia

2021

Journal of Cleaner Production

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Lithium-sulfur (Li–S) batteries present a great potential to displace current energy storage chemistries thanks to their energy density that goes far beyond conventional batteries. To promote the development of greener Li–S batteries, closing the existing gap between the quantification of the potential environmental impacts associated with Li–S cathodes and their performance is required. Herein we show a comparative analysis of the life cycle environmental impacts of five Li–S battery cathodes with high sulfur loadings (1.5–15 mg·cm −2 ) through life cycle assessment (LCA) methodology and cradle-to-gate boundary. Depending on the selected battery, the environmental impact can be reduced by a factor up to 5. LCA results from Li–S batteries are compared with the conventional lithium ion battery from Ecoinvent 3.6 database, showing a decreased environmental impact per kWh of storage capacity. A predominant role of the electrolyte on the environmental burdens associated with the use of Li–S batteries was also found. Sensitivity analysis shows that the specific impacts can be reduced by up to 70% by limiting the amount of used electrolyte. Overall, this manuscript emphasizes the potential of Li–S technology to develop environmentally benign batteries aimed at replacing existing energy storage systems.

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Section: Methodsmentioning

confidence: 99%

Comparative life cycle assessment of high performance lithium-sulfur battery cathodes

López

Akizu‐Gardoki

Lizundia

2021

Journal of Cleaner Production

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“…Since the main motivation for RAC is the sustainability of the concrete industry, this implies that RAC may not always be the better option. Environmental and economic impacts vary from case to case and depend on transport distances, equipment, and technology used [ 13 , 15 , 16 , 17 , 18 , 19 ]. Due to these variations, it is important to study whether NAC or RAC is the most sustainable option on a case-by-case basis.…”

Section: Introductionmentioning

confidence: 99%

Environmental and Economic Life Cycle Assessment of Recycled Coarse Aggregates: A Portuguese Case Study

Dias¹,

Pacheco²,

Silvestre

et al. 2021

Materials

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The incorporation of recycled aggregates in concrete not only reduces the extraction of natural resources, but also decreases landfill disposal of construction and demolition waste. Hence, environmental impacts and costs are reduced, promoting the use of recycled aggregates and circular economy. However, the impacts of transport depend on the distance between facilities and longer distances may result in recycled aggregates being more costly and having larger environmental impact than natural aggregates. This paper discusses this topic, presents a review on the use of life cycle assessment methodology on natural and recycled aggregates for concrete, and applies this methodology in a real context pertaining the procurement of coarse aggregates to ready-mix concrete plants. A case study of two Portuguese regions, Coimbra and Lisbon, is presented. For each region, a quarry, a construction and demolition waste plant, and a ready-mix concrete plant are chosen and a comparative life cycle assessment is made. Different scenarios for the supply of natural and recycled aggregates are studied and the scenarios for recycled aggregates procurement include different hypotheses for the installation (construction and demolition waste plant or quarry) processing the construction and demolition waste into recycled aggregates. For this case study and both regions, it was found that the supply of recycled aggregates produced at the construction and demolition waste plant has lower environmental impact and cost than all other scenarios, including the provision of natural aggregates, except when it is assumed that the quarry is licensed and equipped for receiving unsorted construction and demolition waste and processing it into recycled aggregates. The paper shows that transport distance is a determining factor in the comparison of the impacts of the procurement of natural and recycled aggregates. Moreover, in the Portuguese context, the environmental impacts of the procurement of recycled aggregates may be smaller than those of natural aggregates, but cost may be larger for recycled aggregates, preventing that the most sustainable option is chosen.

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“…Moreover, appropriate workability have to be ensured. Currently, aggregate packing (among particle packing models) are in focus [ 28 , 29 , 30 ]. Cement paste (CP) quality is the result of a porous system (porosity, capillarity).…”

Section: Introductionmentioning

confidence: 99%

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

2021

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This experimental study focuses on the assessment of mineral additives and their incorporation into cement composites (CC). The assessment was based on a holistic approach to the performance of the durability properties of CC. Environmental suitability was also taken into consideration. In the experiments, cement pastes with w/c ratios of 0.3, 0.4, and 0.5, respectively, were prepared. Natural zeolite (NZ) and densified silica fume (SF) at doses of 7.5 and 15.0 wt.% of cement were used as the investigated (replacement) materials. Their effects (including development over time) on density, strength (flexural and compressive), porosity by water absorption, permeability by rapid chloride penetration (RCP) test, phase content by thermal analysis, and hydration progression, were observed. The results were then used to propose an evaluation approach. Natural zeolite was used for its known pozzolanic activity and classification as a supplementary cementitious material (SCM). In contrast SF acted as a filler in cement pastes, and thus did not have a direct positive effect on durability. The concept of comprehensive analysis for unknown additive classification is proposed to expressly differentiate between SCM, inert, and improving mineral additive. This concept could be applied to the assessment of mineral additives with regards to the durability and suitability of cement composites.

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Comparative LCA of recycled and natural aggregate concrete using Particle Packing Method and conventional method of design mix

Cited by 110 publications

References 31 publications

Comparative life cycle assessment of high performance lithium-sulfur battery cathodes

Comparative life cycle assessment of high performance lithium-sulfur battery cathodes

Environmental and Economic Life Cycle Assessment of Recycled Coarse Aggregates: A Portuguese Case Study

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

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