Concrete based on recycled aggregates – Recycling and environmental analysis: A case study of paris’ region

Fraj, Amor Ben; Idir, Rachida

doi:10.1016/j.conbuildmat.2017.09.059

Cited by 107 publications

(42 citation statements)

References 67 publications

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“…According to the previous analysis, it is important to point out that some recent studies aimed at evaluating the environmental interest of using recycled aggregates, in comparison with natural aggregates, as analyzed by [41] For this purpose, a recent interesting study was conducted by [42]. In their study, 216 concrete mixes from 24 references (selected from papers published in reference journals and conference proceedings) were analyzed in order to define the best concrete solutions from environmental and economic perspectives.…”

Section: State Of Art Of Lca and Recycled Aggregates Concretementioning

confidence: 99%

Life Cycle Assessment (LCA) of Different Kinds of Concrete Containing Waste for Sustainable Construction

et al. 2018

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Concrete production causes significant environmental damage during its entire life cycle due to the large consumption of natural aggregate. The aim of this research was to use the Life Cycle Assessment (LCA) methodology to conduct a comparative analysis of four different concrete mixtures, i.e., construction and demolition waste (CDW), incinerator ashes, marble sludge, and blast furnace slag. The LCA study was implemented in the Campania Region of Italy. The main contribution of the study was that it proposed the use of "green" recycled aggregates in concrete production in order to assess the reduction of potential adverse impacts, from both environmental and energy perspectives. SimaPro © software was used to conduct the analysis. The main results of the research showed that the recycled aggregates that were analyzed were preferable to traditional concrete. In particular, the recycled aggregate that had the least adverse impact on the environment was blast furnace waste.

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Section: State Of Art Of Lca and Recycled Aggregates Concretementioning

confidence: 99%

Life Cycle Assessment (LCA) of Different Kinds of Concrete Containing Waste for Sustainable Construction

et al. 2018

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“…Investigating a case of aggregate production near Rome, Simion et al [98] indicate that secondary materials have only 40% of the impact of aggregates from natural resources, but not all uses result in such environmental benefits [99]. Some studies indicate that when using low-grade recycled aggregates in concrete production, more cement is required to obtain the same quality of concrete [100,101]. The environmental benefit of recycling of minerals depends in part on the comparative transportation distances of virgin and secondary resources [102,103].…”

Section: Recyclingmentioning

confidence: 99%

Material efficiency strategies to reducing greenhouse gas emissions associated with buildings, vehicles, and electronics—a review

Hertwich

Ali

Ciacci

et al. 2019

Environ. Res. Lett.

307

164

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As one quarter of global energy use serves the production of materials, the more efficient use of these materials presents a significant opportunity for the mitigation of greenhouse gas (GHG) emissions. With the renewed interest of policy makers in the circular economy, material efficiency (ME) strategies such as light-weighting and downsizing of and lifetime extension for products, reuse and recycling of materials, and appropriate material choice are being promoted. Yet, the emissions savings from ME remain poorly understood, owing in part to the multitude of material uses and diversity of circumstances and in part to a lack of analytical effort. We have reviewed emissions reductions from ME strategies applied to buildings, cars, and electronics. We find that there can be a systematic trade-off between material use in the production of buildings, vehicles, and appliances and energy use in their operation, requiring a careful life cycle assessment of ME strategies. We find that the largest potential emission reductions quantified in the literature result from more intensive use of and lifetime extension for buildings and the light-weighting and reduced size of vehicles. Replacing metals and concrete with timber in construction can result in significant GHG benefits, but trade-offs and limitations to the potential supply of timber need to be recognized. Repair and remanufacturing of products can also result in emission reductions, which have been quantified only on a case-by-case basis and are difficult to generalize. The recovery of steel, aluminum, and copper from building demolition waste and the end-of-life vehicles and appliances already results in the recycling of base metals, which achieves significant emission reductions. Higher collection rates, sorting efficiencies, and the alloy-specific sorting of metals to preserve the function of alloying elements while avoiding the contamination of base metals are important steps to further reduce emissions.

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“…For the analysis of the development of the pore structure of the samples, mercury intrusion porosimetry was used, in spite of its drawbacks [32][33][34]. The equipment used for performing the tests was a Poremaster-60 GT porosimeter (Quantachrome Instruments, Boynton Beach, FL, USA).…”

Section: Mercury Intrusion Porosimetrymentioning

confidence: 99%

The Use of Volcanic Powder as a Cement Replacement for the Development of Sustainable Mortars

et al. 2020

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Currently, reduction of environmental effects of the cement industry is an issue of global interest and one of the alternatives is to replace clinker with additions such as volcanic powder. The purpose of this work is to study the influence of up to 400 hardening days of volcanic powder, obtained from the last eruption of the Calbuco volcano (Chile), on the pore structure, mechanical performance, and durability-related properties of mortars which incorporate up to 20% volcanic powder as a substitution for clinker. In addition, an evaluation of greenhouse gases emissions was performed in order to quantify the possible environmental benefits of incorporating the volcanic powder in the mortars. The results obtained indicated that mortars with contents of 10% and 20% of volcanic powder had adequate service properties and improved all durability-related properties overall as compared with those noted for ordinary Portland cement. Additionally, the use of up to 20% volcanic powder makes it possible to reduce the CO2 emissions of mortars by almost 20%, demonstrating the advantages of incorporating this addition in mortars.

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Concrete based on recycled aggregates – Recycling and environmental analysis: A case study of paris’ region

Cited by 107 publications

References 67 publications

Life Cycle Assessment (LCA) of Different Kinds of Concrete Containing Waste for Sustainable Construction

Life Cycle Assessment (LCA) of Different Kinds of Concrete Containing Waste for Sustainable Construction

Material efficiency strategies to reducing greenhouse gas emissions associated with buildings, vehicles, and electronics—a review

The Use of Volcanic Powder as a Cement Replacement for the Development of Sustainable Mortars

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