The Experts below are selected from a list of 143547 Experts worldwide ranked by ideXlab platform

Dingqiang Fan - One of the best experts on this subject based on the ideXlab platform.

  • development of a novel cleaner Construction Product ultra high performance concrete incorporating lead zinc tailings
    Journal of Cleaner Production, 2018
    Co-Authors: Xinpeng Wang, Zhonghe Shui, Zemin Zhao, Qiulei Song, Bo Yang, Dingqiang Fan
    Abstract:

    Abstract This paper addresses a development for a novel sustainable Ultra-High Performance Concrete (UHPC) incorporating lead-zinc tailings. The modified Andreasen & Andersen particle packing model is utilized to achieve a densely compacted cementitious matrix and the lead-zinc tailings are utilized to replace cement by 10%, 20%, 30% and 40% (wt.), while the packing densities of all the designed UHPC mixtures are almost keep the same. Then, the impact of added lead-zinc tailings on the fresh and hardened behaviors of the developed UHPC is investigated. The obtained experimental results reveal that the workability, compressive strength and chlorine anion penetration resistance of the UHPC decrease with the addition of lead-zinc tailings. However, it is possible to develop self-compacting UHPC with up to 30% replacement of cement by lead-zinc. Moreover, it is noteworthy that the addition of lead-zinc tailings could significantly decrease the early autogenous shrinkage of UHPC, which is beneficial for its microstructure development and application. Additionally, the leaching toxicity of heavy metals for this developed sustainable UHPC is far lower than that of the National Standard of China. The ecological evaluation demonstrates that replacing cement by lead-zinc tailings in the Production of UHPC can significantly reduce its environmental impact, which provides a promising view for developing and applying a novel cleaner Construction Product with advanced properties.

Christian Tessier - One of the best experts on this subject based on the ideXlab platform.

  • Adaptation of environmental data to national and sectorial context: application for reinforcing steel sold on the French market
    The International Journal of Life Cycle Assessment, 2013
    Co-Authors: Fernanda Gomes, Raphaël Brière, Adélaïde Feraille, Guillaume Habert, Sébastien Lasvaux, Christian Tessier
    Abstract:

    Environmental data for steel Products are generally proposed at a continental or a global scale. The question we are tackling here is: does the fact that steel as a global market necessarily reduces the need for national data? In this study, the environmental impact of reinforcing steel sold in France is evaluated. To do so, a specific environmental inventory is adapted from Ecoinvent database. CML method is used for impact calculation and both methods “recycled content” as well as “end of life recycling approach” are tested. This study shows that there is a specificity of reinforcing steel Products sold in France compared to European value. It is due to the fact that reinforcing steel is mainly made with recycled steel as the market growth for Construction Product in France is limited allowing a very high recycled content. This result is not sensitive neither to the allocation method used for recycling (cut-off approach or system expansion) nor to transport distance and electricity country mix used. The result of this study can be used with confidence in every Construction site work located on the French territory. Furthermore, the present study advocates for an adaptation of global database to local context defined by a specific industrial sector and a geographic region even for Product such as steel that may be considered as a first approximation as a global Product.

Laurent Chateau - One of the best experts on this subject based on the ideXlab platform.

  • environmental acceptability of beneficial use of waste as Construction material state of knowledge current practices and future developments in europe and in france
    Journal of Hazardous Materials, 2007
    Co-Authors: Laurent Chateau
    Abstract:

    Abstract Since a decade, numerous industrial and public initiatives have been launched in order to make knowledge, practices and mentalities evolve in relation to the acceptability of using waste instead of raw material as Construction Product. The objectives of these initiatives have been to evaluate current practices and to make new solutions and beneficial use channels emerge. At the same time scientific and standardisation communities have developed methodologies and tools to fit with the assessment needs expressed by industrialists and public decision-makers. In spite of that, some factors, some of them being cross-linked, make the perpetuation of beneficial use channels or even the concretisation of research projects difficult. To cope with this situation, in the framework of sustainable development applied to natural and alternative material, the French Directorate of Road has launched a project aiming at providing public contracting authorities with a document gathering both technical and environmental requirements that they can prescribe in public market tender calls to promote the use of waste and out-of-technical-specifications-material. This paper deals with the presentation of this project focusing more specifically on the approach to assess both technical and environmental acceptability of waste and out-of-technical-specifications-material to be used as alternative material in road Construction in France. The current European situation is first described and this paper finally discusses briefly the other key aspects – than environmental acceptability – that have to be taken into account to succeed waste beneficial use.

Xinpeng Wang - One of the best experts on this subject based on the ideXlab platform.

  • development of a novel cleaner Construction Product ultra high performance concrete incorporating lead zinc tailings
    Journal of Cleaner Production, 2018
    Co-Authors: Xinpeng Wang, Zhonghe Shui, Zemin Zhao, Qiulei Song, Bo Yang, Dingqiang Fan
    Abstract:

    Abstract This paper addresses a development for a novel sustainable Ultra-High Performance Concrete (UHPC) incorporating lead-zinc tailings. The modified Andreasen & Andersen particle packing model is utilized to achieve a densely compacted cementitious matrix and the lead-zinc tailings are utilized to replace cement by 10%, 20%, 30% and 40% (wt.), while the packing densities of all the designed UHPC mixtures are almost keep the same. Then, the impact of added lead-zinc tailings on the fresh and hardened behaviors of the developed UHPC is investigated. The obtained experimental results reveal that the workability, compressive strength and chlorine anion penetration resistance of the UHPC decrease with the addition of lead-zinc tailings. However, it is possible to develop self-compacting UHPC with up to 30% replacement of cement by lead-zinc. Moreover, it is noteworthy that the addition of lead-zinc tailings could significantly decrease the early autogenous shrinkage of UHPC, which is beneficial for its microstructure development and application. Additionally, the leaching toxicity of heavy metals for this developed sustainable UHPC is far lower than that of the National Standard of China. The ecological evaluation demonstrates that replacing cement by lead-zinc tailings in the Production of UHPC can significantly reduce its environmental impact, which provides a promising view for developing and applying a novel cleaner Construction Product with advanced properties.

Fernanda Gomes - One of the best experts on this subject based on the ideXlab platform.

  • Adaptation of environmental data to national and sectorial context: application for reinforcing steel sold on the French market
    The International Journal of Life Cycle Assessment, 2013
    Co-Authors: Fernanda Gomes, Raphaël Brière, Adélaïde Feraille, Guillaume Habert, Sébastien Lasvaux, Christian Tessier
    Abstract:

    Environmental data for steel Products are generally proposed at a continental or a global scale. The question we are tackling here is: does the fact that steel as a global market necessarily reduces the need for national data? In this study, the environmental impact of reinforcing steel sold in France is evaluated. To do so, a specific environmental inventory is adapted from Ecoinvent database. CML method is used for impact calculation and both methods “recycled content” as well as “end of life recycling approach” are tested. This study shows that there is a specificity of reinforcing steel Products sold in France compared to European value. It is due to the fact that reinforcing steel is mainly made with recycled steel as the market growth for Construction Product in France is limited allowing a very high recycled content. This result is not sensitive neither to the allocation method used for recycling (cut-off approach or system expansion) nor to transport distance and electricity country mix used. The result of this study can be used with confidence in every Construction site work located on the French territory. Furthermore, the present study advocates for an adaptation of global database to local context defined by a specific industrial sector and a geographic region even for Product such as steel that may be considered as a first approximation as a global Product.