Hydromechanical loading and compressibility of fibrous reinforcements

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Hygro-thermal behavior of raw earth concrete

International audienceRaw earth materials represent an alternative to the traditional building materials since a lot of time. It is a material available in large quantities, ecological, economic and environmental. This material can be compacted or stabilized by small quantities of binders to improve its mechanical behavior. For its hygro-thermal behavior, several studies have shown that the raw earth is characterized by a very interesting and encouraging temperature-humidity regulating power for comfort and well-being. In this study, we are interested in the hygrothermal characterization of raw earth concrete. Different complementary techniques were used on the one hand for the thermal properties and on the other hand for the water vapor permeability. For the measurement of thermal conductivity, the device KD2 Pro was used to determine. For the measurement of water vapor permeability, the cup method was used (Ferroukhi, 2016; Hibouche, 2013). The results were analyzed and compared with those of traditional building materials which highlighted the interesting hygrothermal behavior of the studied raw earth concrete

Hygro-thermal behavior of raw earth concrete

Raw earth materials represent an alternative to the traditional building materials since a lot of time. It is a material available in large quantities, ecological, economic and environmental. This material can be compacted or stabilized by small quantities of binders to improve its mechanical behavior. For its hygro-thermal behavior, several studies have shown that the raw earth is characterized by a very interesting and encouraging temperature-humidity regulating power for comfort and well-being. In this study, we are interested in the hygrothermal characterization of raw earth concrete. Different complementary techniques were used on the one hand for the thermal properties and on the other hand for the water vapor permeability. For the measurement of thermal conductivity, the device KD2 Pro was used to determine. For the measurement of water vapor permeability, the cup method was used (Ferroukhi, 2016; Hibouche, 2013). The results were analyzed and compared with those of traditional building materials which highlighted the interesting hygrothermal behavior of the studied raw earth concrete

Two decades of research trends in microbial-induced carbonate precipitation for heavy metal removal: a bibliometric review and literature review

Amidst the increasing significance of innovative solutions for bioremediation of heavy metal removal, this paper offers a thorough bibliometric analysis of microbial-induced carbonate precipitation (MICP) for heavy metal removal, as a promising technology to tackle this urgent environmental issue. This study focused on articles published from 1999 to 2022 in the Scopus database. It assesses trends, participation, and key players within the MICP for heavy metal sequestration. Among the 930 identified articles, 74 countries participated in the field, with China being the most productive. Varenyam Achal, the Chinese Academy of Sciences, and Chemosphere are leaders in the research landscape. Using VOSviewer and R-Studio, keyword hotspots like "MICP", "urease", and "heavy metals" underscore the interdisciplinary nature of MICP research and its focus on addressing a wide array of environmental and soil-related challenges. VOSviewer emphasises essential terms like "calcium carbonate crystal", while R-Studio highlights ongoing themes such as "soil" and "organic" aspects. These analyses further showcase the interdisciplinary nature of MICP research, addressing a wide range of environmental challenges and indicating evolving trends in the field. This review also discusses the literature concerning the potential of MICP to immobilise contaminants, the evolution of the research outcome in the last two decades, MICP treatment techniques for heavy metal removal, and critical challenges when scaling from laboratory to field. Readers will find this analysis beneficial in gaining valuable insights into the evolving field and providing a solid foundation for future research and practical implementation

Bibliometric analysis of research trends in biogranulation technology for wastewater treatment

Inadequate management and treatment of wastewater pose significant threats, including environmental pollution, degradation of water quality, depletion of global water resources, and detrimental effects on human well-being. Biogranulation technology has gained increasing traction for treating both domestic and industrial wastewater, garnering interest from researchers and industrial stakeholders alike. However, the literature lacks comprehensive bibliometric analyses that examine and illuminate research hotspots and trends in this field. This study aims to elucidate the global research trajectory of scientific output in biogranulation technology from 1992 to 2022. Utilizing data from the Scopus database, we conducted an extensive analysis, employing VOSviewer and the R-studio package to visualize and map connections and collaborations among authors, countries, and keywords. Our analysis revealed a total of 1703 journal articles published in English. Notably, China emerged as the leading country, Jin Rencun as the foremost author, Bioresource Technology as the dominant journal, and Environmental Science as the prominent subject area, with the Harbin Institute of Technology leading in institutional contributions. The most prominent author keyword identified through VOSviewer analysis was “aerobic granular sludge,” with “sequencing batch reactor” emerging as the dominant research term. Furthermore, our examination using R Studio highlighted “wastewater treatment” and “sewage” as notable research terms within the field. These findings underscore a diverse research landscape encompassing fundamental aspects of granule formation, reactor design, and practical applications. This study offers valuable insights into biogranulation potential for efficient wastewater treatment and environmental remediation, contributing to a sustainable and cleaner future

Improvement of the Mechanical Properties of P300 Kaolinite Using MICP in the Low Water Content Range

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