scholarly journals Comparative “from Cradle to Gate” Life Cycle Assessments of Hot Mix Asphalt (HMA) Materials

2017 ◽  
Vol 9 (3) ◽  
pp. 400 ◽  
Author(s):  
Laura Moretti ◽  
Vittorio Mandrone ◽  
Antonio D’Andrea ◽  
Silvia Caro
Keyword(s):  
Life Cycle ◽  
Hot Mix Asphalt ◽  
Life Cycle Assessments ◽  
Cradle To Gate

scholarly journals A Systematic Review of the Discrepancies in Life Cycle Assessments of Green Concrete

2019 ◽  
Vol 9 (22) ◽  
pp. 4803 ◽  
Author(s):  
Hafez ◽  
Kurda ◽  
Cheung ◽  
Nagaratnam
Keyword(s):  
Life Cycle ◽  
Environmental Benefits ◽  
Portland Cement Concrete ◽  
Life Cycle Assessments ◽  
Market Prices ◽  
Green Concrete ◽  
Scenario Analyses ◽  
Knowing That ◽  
Cradle To Gate ◽  
The Impact

It is challenging to measure the environmental impact of concrete with the absence of a consensus on a standardized methodology for life cycle assessment (LCA). Consequently, the values communicated in the literature for “green” concrete alternatives vary widely between 84 and 612 kg eq CO2/m3. This does not provide enough evidence regarding the acclaimed environmental benefits compared to ordinary Portland cement concrete knowing that the average for the latter was concluded in this study to be around 370 kg eq CO2/m3. Thus, the purpose of this study was to survey the literature on concrete LCAs in an attempt to identify the potential sources of discrepancies and propose a potential solution. This was done through examining 146 papers systematically and attributing the sources of error to the four stages of an LCA: scope definition, inventory data, impact assessment and results interpretations. The main findings showed that there are 13 main sources of discrepancies in a concrete LCA that contribute to the incompatibility between the results. These sources varied between (i) user-based choices such as depending on a cradle-to-gate scope, selecting a basic volume-based functional unit and ignoring the impact allocation and (ii) intrinsic uncertainty in some of the elements, such as the means of transportation, the expected service life and fluctuations in market prices. The former affects the reliability of a study, and hence, a concrete LCA methodology should not allow for any of the uncertainties. On the other hand, the latter affects the degree of uncertainty of the final outcome, and hence, we recommended conducting scenario analyses and communicating the aggregated uncertainty through the selected indicators.

Comparative cradle-to-gate life cycle assessments of cellulose dissolution with 1-butyl-3-methylimidazolium chloride and N-methyl-morpholine-N-oxide

2011 ◽  
Vol 13 (2) ◽  
pp. 367-375 ◽  
Author(s):  
Serena Righi ◽  
Andrea Morfino ◽  
Paola Galletti ◽  
Chiara Samorì ◽  
Alessandro Tugnoli ◽  
...  
Keyword(s):  
Life Cycle ◽  
Cellulose Dissolution ◽  
Life Cycle Assessments ◽  
Cradle To Gate

scholarly journals Selection of low impact concrete mixtures based on life-cycle assessment mixtures

2018 ◽  
Vol 11 (6) ◽  
pp. 1354-1380
Author(s):  
M. G. SILVA ◽  
V. GOMES ◽  
M. R. M. SAADE
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Experimental Studies ◽  
Life Cycle Assessments ◽  
Performance Requirements ◽  
Concrete Mixtures ◽  
Concrete Production ◽  
Cradle To Gate ◽  
Selection Of

Abstract Over the past decades, extensive research has been carried out to reduce the environmental impacts associated with the cement and concrete production. Life-cycle assessment (LCA) enables the quantification of the environmental loads and offers a useful perspective to scientifically support such studies. In this paper, we demonstrate LCA’s contribution to the selection of low environmental impact concretes, using breakwater coreloc components as a case study. A detailed experimental study was designed for the selection of an alkali activator for blast furnace slag (bfs) to produce concrete suitable for breakwater structures; for the evaluation of concrete properties and for the performance assessment of full scale elements in the field, as well as in the laboratory. Sodium silicate-activated bfs concrete mixtures achieved the best results in terms of performance requirements. Our cradle-to-gate life-cycle assessments showed that, though this chemical activator indeed produces lower global warming potential mixtures than the reference portland CP V-ARI concrete, it induces relevant impacts in several environmental categories. Such information is critical when selecting and optimizing low-impact concrete mixture design, and would not be detected in typical experimental studies that are exclusively guided by compliance with performance requirements.

Evaluation of cradle to gate environmental impact of frozen green bean production by means of life cycle assessment

2019 ◽  
Vol 236 ◽  
pp. 117638
Author(s):  
Alessio Ilari ◽  
Daniele Duca ◽  
Giuseppe Toscano ◽  
Ester Foppa Pedretti
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Green Bean ◽  
Cradle To Gate
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