Identifying hotspots of environmental impact in the development of novel inorganic polymer paving blocks from bauxite residue

Joyce, P. James; Hertel, Tobias; Goronovski, Andrei; Tkaczyk, Alan H.; Pontikes, Yiannis; Björklund, Anna

doi:10.1016/j.resconrec.2018.07.006

Cited by 39 publications

(23 citation statements)

References 52 publications

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“…In 33 case studies, the authors made no statement on data quality. Authors of six case studies qualitatively discuss the data quality issue [18,37,39,49,76,77]. While in five case studies, a data quality index is applied.…”

Section: Qualitymentioning

confidence: 99%

“…For obtaining the scale-up data, the authors of the reviewed studies use different sources. Predictive scenarios are mostly established using simulation results [32,41,42], literature findings, input from experts [88], modeling data [34], assumptions [77], and other calculations [89]. Besides that, initial base cases [49], full-scale estimates [58], data from experiments [90], power laws [91], risk analysis [18], design modifications [49], and (linear) scaling rates [90] are applied.…”

Section: Scalingmentioning

confidence: 99%

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How to Conduct Prospective Life Cycle Assessment for Emerging Technologies? A Systematic Review and Methodological Guidance

2020

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Emerging technologies are expected to contribute to environmental sustainable development. However, throughout the development of novel technologies, it is unknown whether emerging technologies can lead to reduced environmental impacts compared to a potentially displaced mature technology. Additionally, process steps suspected to be environmental hotspots can be improved by process engineers early in the development of the emerging technology. In order to determine the environmental impacts of emerging technologies at an early stage of development, prospective life cycle assessment (LCA) should be performed. However, consistency in prospective LCA methodology is lacking. Therefore, this article develops a framework for a prospective LCA in order to overcome the methodological inconsistencies regarding prospective LCAs. The methodological framework was developed using literature on prospective LCAs of emerging technologies, and therefore, a literature review on prospective LCAs was conducted. We found 44 case studies, four review papers, and 17 papers on methodological guidance. Three main challenges for conducting prospective LCAs are identified: Comparability, data, and uncertainty challenges. The issues in defining the aim, functionality, and system boundaries of the prospective LCAs, as well as problems with specifying LCIA methodologies, comprise the comparability challenge. Data availability, quality, and scaling are issues within the data challenge. Finally, uncertainty exists as an overarching challenge when applying a prospective LCA. These three challenges are especially crucial for the prospective assessment of emerging technologies. However, this review also shows that within the methodological papers and case studies, several approaches exist to tackle these challenges. These approaches were systematically summarized within a framework to give guidance on how to overcome the issues when conducting prospective LCAs of emerging technologies. Accordingly, this framework is useful for LCA practitioners who are analyzing early-stage technologies. Nevertheless, further research is needed to develop appropriate scale-up schemes and to include uncertainty analyses for a more in-depth interpretation of results.

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Section: Qualitymentioning

confidence: 99%

Section: Scalingmentioning

confidence: 99%

How to Conduct Prospective Life Cycle Assessment for Emerging Technologies? A Systematic Review and Methodological Guidance

2020

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“…As a result, there is a significant interest towards development of BR valorization methods, such as development of BR containing construction materials (bricks, cement, inorganic polymers (Evans, 2016;Joyce et al, 2018;Raj et al, 2013)) and recovery of valuable metals from BR (Bonomi et al, 2016). BR is rich in iron, aluminium, titanium and Rare Earth Elements (REE), as presented in Table 1, as well as has elevated concentration of naturally occurring radionuclides.…”

Section: Figurementioning

confidence: 99%

Radiological assessment of the bauxite residue valorization chain

Goronovski

Tkaczyk

2019

J Radioanal Nucl Chem

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“…In recent years, investigators around the world have researched the treatment and utilization of red mud. These investigations mostly focused on utilizing the red mud to produce building materials (such as bricks, novel inorganic polymer paving blocks, cement, concrete, glass, and ceramics) [5][6][7][8][9][10][11][12], recover valuable elements [13,14], purify gas [15], treat water [16], and improve soil [17]. The building materials industry has been very interested in the treatment and utilization of red mud, because it can be cost effective.…”

Section: Introductionmentioning

confidence: 99%

Properties Analysis of Asphalt Binders Containing Bayer Red Mud

Li-yang

Gao

et al. 2020

Materials

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In this work, related performances of asphalt binders with Bayer red mud powder (RMP) were studied. RMP replaced the traditional limestone powder (LSP) as a filler in asphalt binder. The replacement rates were 0%, 25%, 50%, 75%, and 100%, respectively. In this study, seven F/A (filler-to-asphalt, weight/weight) ratios for each of the fillers were selected: 0.3, 0.6, 0.9, 1.2, 1.5, 1.8, and 2.1. Penetration, softening point, rotational viscosity (RV), dynamic shear rheometry (DSR), and bending beam rheometry (BBR) tests were used to evaluate the properties of the asphalt binder. Penetration into the asphalt binder decreases linearly with increasing F/A ratio. Moreover, penetration of binder with RMP is lower than that of asphalt binder with LSP (RMP0), and among the five fillers tested, RMP100 showed most significant influence on penetration of the asphalt binder. The addition of RMP increases the softening point of the binder. DSR results show that the improvement in the high temperature performance is most significant after replacing 75% of the LSP with Bayer RMP. BBR results show that with increasing substitution of RMP for LSP, the creep stiffness (S) increased while the rate of change of S (m-value) declined. The low temperature performance of every asphalt binder was not enough to meet the Superpave requirements. In order to meet the Superpave requirements for S and m-values, the maximum F/A ratios of the five replacements corresponding to the fillers with 0%, 25%, 50%, 75%, and 100% RMP, were 1.3, 1.2, 1.1, 1.0 and 0.9, respectively. At 135 • C, rotational viscosity showed that RMP75 and RMP100 with a maximum F/A ratio of 1.1 are the best choices for asphalt binders, considering economic and construction requirements.

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Identifying hotspots of environmental impact in the development of novel inorganic polymer paving blocks from bauxite residue

Cited by 39 publications

References 52 publications

How to Conduct Prospective Life Cycle Assessment for Emerging Technologies? A Systematic Review and Methodological Guidance

How to Conduct Prospective Life Cycle Assessment for Emerging Technologies? A Systematic Review and Methodological Guidance

Radiological assessment of the bauxite residue valorization chain

Properties Analysis of Asphalt Binders Containing Bayer Red Mud

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