Investigation of Dredged Sediments Reuse as Building Materials

The main objective of this study is to investigate the mechanical properties of dredged sediments, which are considered as waste from the process of removing sediments from the bottom of a dam's reservoir. The dredged sediments with stabilization can to be reused as construction and building materials in civil engineering works. The mechanical tests included unconfined compressive strength (UCS) and splitting tensile strength (STS) to understand the behavior of the dredged sediments stabilized with ordinary portland cement (OPC) type I and fly ash (FA). The overall test results indicated that OPC type I and FA were effective in stabilizing the sampled dredged sediments from two dams in northern Thailand. The stabilization with 10% FA content was found to be most effective for improving mechanical properties of the stabilized samples.

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Dredged Sediments as Materials in Tunnel Construction

Volume 15: Safety, Reliability and Risk; Virtual Podium (Posters) ◽

10.1115/imece2013-62392 ◽

2013 ◽

Cited By ~ 1

Author(s):

Fatiha Kazi Aoual-Benslafa ◽

Djemal Kerdal ◽

Belkacem Mekerta ◽

Abdelaziz Semcha

Keyword(s):

Experimental Study ◽

Mechanical Behaviour ◽

Building Materials ◽

Elevated Temperatures ◽

Partial Replacement ◽

Environmental Concerns ◽

Tunnel Construction ◽

Dredged Sediments ◽

Mineralogical Characteristics ◽

Laboratory Results

The actual shortage of land aggregates and environmental concerns raised by dumping at sea of dredged sediments (DS), more than ever, DS could constitute a new source of building materials. This experimental study investigates the potential of using DS from harbour of Oran in tunnel construction; the first objective is to determine their chemical, physical and mineralogical characteristics. The concept of enhancing building material characteristics based on the component characteristics of DS is considered. Thus, the treatment by the leaching and the natural decantation is used to decrease their salt and water content. Finally, the influence of various percentages of DS (from 20%, to up to 35% of sand mass by DS) in the mechanical behaviour of mortars was analyzed. Compressive strengths of a first set of mortar specimens were determined after 7, 28, 60 and 90 days of moist curing. The second set of mortar specimens, that were submitted to chemical attacks and elevated temperatures, had their residual compressive strengths determined at 118 days and 150 days. So far, laboratory results show that partial replacement of 20% or 25% of sand by DS in mortars give good results.

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Scanning electron microscopy of asbestos-containing material where the asbestos fibers are considered locked in a binder

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100148198 ◽

1993 ◽

Vol 51 ◽

pp. 472-473

Author(s):

J. R. Millette ◽

R. S. Brown

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Environmental Protection Agency ◽

Building Materials ◽

The United States ◽

Protection Agency ◽

Asbestos Fibers ◽

Different Types ◽

Binder Material ◽

Scanning Electron

The United States Environmental Protection Agency (EPA) has labeled as “friable” those building materials that are likely to readily release fibers. Friable materials when dry, can easily be crumbled, pulverized, or reduced to powder using hand pressure. Other asbestos containing building materials (ACBM) where the asbestos fibers are in a matrix of cement or bituminous or resinous binders are considered non-friable. However, when subjected to sanding, grinding, cutting or other forms of abrasion, these non-friable materials are to be treated as friable asbestos material. There has been a hypothesis that all raw asbestos fibers are encapsulated in solvents and binders and are not released as individual fibers if the material is cut or abraded. Examination of a number of different types of non-friable materials under the SEM show that after cutting or abrasion, tuffs or bundles of fibers are evident on the surfaces of the materials. When these tuffs or bundles are examined, they are shown to contain asbestos fibers which are free from binder material. These free fibers may be released into the air upon further cutting or abrasion.

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History and Methods of Testing Building Materials

Scientific American ◽

10.1038/scientificamerican05091896-16975bsupp ◽

1896 ◽

Vol 41 (1062supp) ◽

pp. 16975-16977

Keyword(s):

Building Materials

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Architecture and Building Materials

Scientific American ◽

10.1038/scientificamerican11261859-353 ◽

1859 ◽

Vol 1 (22) ◽

pp. 353-353

Keyword(s):

Building Materials

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Legal framework for improvement of agroecology by cultivating jerusalem artichoke

Scientific and Informational Bulletin of Ivano-Frankivsk University of Law Named after King Danylo Halytskyi - Scientific and informational bulletin of Ivano-Frankivsk University of Law named after King Danylo Halytskyi ◽

10.33098/2078-6670.2020.9.21.59-66 ◽

2020 ◽

pp. 59-66

Author(s):

Mykhailo Kosmii ◽

Vasyl. Kasiianchuk ◽

Ruslan Zhyrak ◽

Ivan Krykhovetskyi

Keyword(s):

Environmental Protection ◽

Organic Farming ◽

Alternative Energy ◽

Building Materials ◽

Environmental Law ◽

Jerusalem Artichoke ◽

Legal Framework ◽

Legal Regulation ◽

Practical Application ◽

Scientific Cognition

The purpose of this paper is to analyze and research the legal mechanisms which make it possible to improve agroecology through the organization of cultivation of Jerusalem artichoke.Methodology. The methodology includes comprehensive analysis and generalization of available scientific, theoretical, practical and applied material and development of relevant conclusions and recommendations. During the research, the following methods of scientific cognition were used: dialectical, terminological, historical and legal, logical and normative, systemic and structural, functional, normative and dogmatic, generalization methods. Results. The process of analysis and research highlighted the possibilities of cultivating Jerusalem artichoke for improving agroecology, namely improving the ecological state of the atmosphere air and soil, preparing them for organic farming. The article contains examples of practical application of tubers of Jerusalem artichoke and herbage for the production of therapeutic and prophylactic products, alternative energy and highly efficient building materials. Scientific novelty. The study found that the authors summarized and systematized the levels of legal regulation in the field of using Jerusalem artichoke for improving agroecology, preparing soil for organic farming, in particular: the inter-sectoral level which covers the interaction of agricultural and environmental law in terms of cultivation and use of Jerusalem artichoke; the level of integrated environmental and legal regulation; level of individual resource (floristic) legal regulation; the level of environmental protection (anthropoprotection) legislation.Practical importance. The results of the study can be used in law-making and environmental protection activities related to issues of cultivating and using the Jerusalem artichoke as a means of improving agroecology.

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