Special Issue "Environmentally Friendly Geopolymer Composites"

A special issue of Environments (ISSN 2076-3298).

Deadline for manuscript submissions: 30 September 2017

Special Issue Editors

Guest Editor
Prof. Dr. Raffaele Cioffi

INSTM Research Group Napoli Parthenope, Centro Direzionale Napoli, Dipartimento di Ingegneria, Università di Napoli ‘Parthenope’, Isola C4, Napoli 80143, Italy
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Interests: environmental chemistry, environmental safety, environmental engineering and policy, waste management, waste stabilization and solidification, waste recycling, hazardous waste, soil heavy metal pollution assessment, contaminated sediments, natural resource management, construction and demolition wastes, life cycle analysis
Guest Editor
Dr. Claudio Ferone

Department of Engineering, University of Naples "Parthenope", Centro Direzionale, Is. C4, Napoli 80143, Italy
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Interests: geopolymers; alkali-activated materials; sustainibility; waste recycling; advanced ceramics
Guest Editor
Dr. Francesco Messina

INSTM Research Group Napoli Parthenope, Centro Direzionale Napoli, Dipartimento di Ingegneria, Università di Napoli ‘Parthenope’, Isola C4, Napoli 80143, Italy
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Interests: geopolymers; waste stabilization and solidification; construction and demolition wastes; durability assessment; rheology
Guest Editor
Prof. Dr. Giuseppina Roviello

INSTM Research Group Napoli Parthenope, Centro Direzionale Napoli, Dipartimento di Ingegneria, Università di Napoli ‘Parthenope’, Isola C4, Napoli 80143, Italy
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Interests: green chemistry; coordination chemistry; polymer chemistry; geopolymers; composites and hybrid materials; structural characterization

Special Issue Information

Dear Colleagues,

Alkali-activated materials, and geopolymers in particular, represent one of the most interesting classes of innovative binders. Geopolymers are considered environmentally friendly materials, since their use in concrete applications could significantly reduce CO2 emissions thanks to the “low carbon” footprint of several raw materials with a high concentration of aluminosilicates from which they can be prepared, i.e., dehydroxylated kaolinite (metakaolin, MK) or industrial waste, such as fly ash or blast furnace slag. Within this wide research field, geopolymer composites represent a class of particularly versatile materials, with widely tunable performances, depending on the applications for which they are designed. This Special Issue aims to offer the scientific community a deeper comprehension of the structural, microstructural and physico-mechanical characteristics of geopolymeric mortars, geopolymer-resins composites, geopolymers with additive or reinforcement, for applications both in the construction industry, masonry restoration, waste stabilization, and inertization, but also in advanced chemical applications, such as catalysis or the removal of pollutants.

Prof. Dr. Raffaele Cioffi
Prof. Dr. Claudio Ferone
Prof. Dr. Giuseppina Roviello
Dr. Francesco Messina
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Environments is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) is waived for well-prepared manuscripts submitted to this issue. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Geopolymer composites
  • alkali-activated materials
  • sustainability

Published Papers

No papers have been published in this special issue yet, see below for planned papers.

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Type of Paper: Article
Title: Geopolymeric matrices for the stabilization/solidification of industrial wastes and natural residues with a high degree of contamination
Authors: Francesco Messina 1, Anna Simeoni 1, Sabino De Gisi 2,*, Francesco Todaro 2, Claudio Ferone 1, Francesco Colangelo 1, Michele Notarnicola 2 and Raffaele Cioffi 1
Affiliations: 1 Department of Engineering, University of Naples Parthenope, INSTM Research Group Naples Parthenope, Centro Direzionale Is. C4, Naples, Italy; 2 Department of Civil, Environmental, Land, Building Engineering and Chemistry (DICATECh), Technical University of Bari, Via E. Orabona n. 4, 70125 Bari (BA), Italy; Email: sabino.degisi@poliba.it
Abstract: Nowadays, the use of geopolymers in Stabilization/Solidification (S/S) processes for the treatment of different types of waste is a very attractive solution. The geopolymers can be synthesized by the alkaline activation of different solid precursors, mainly amorphous aluminosilicates with moderate content of calcium. Compared to conventional cementitious binders, the geopolymers are characterized by better durability in chemically aggressive environments as well as reduced environmental impacts associated with the generation and synthesis phases. Furthermore, the mix design of geopolymers allows the recovery of substantial quantities of industrial by-products and waste. However, geopolymeric matrices show several problems when they are applied to a very contaminated waste. It is the case of cementitious stabilizing matrices in presence of a considerable content of organic contaminants. These pollutants can generate several problems in the processes of setting and hardening of the cementitious matrix with a consequent lower durability of the final product. With the intent to increase the existing knowledge, the study aims to present the main aspects of interest for the design of geopolymeric mixtures to be applied in S/S processes. In addition, the necessary future developments for an effective marketing of this innovative technology have been discussed.

Type of Paper: Article
Title:
Addition of recycled glass to metakaolin based geopolymeric binder: a citotossicity study
Authors: Isabella Lancellotti 1,*, Michelina Catauro 2 and Cristina Leonelli 1
Affiliations: 1 Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Via P. Vivarelli n. 10, 41125 Modena, Italy; 2 Department of. Industrial and Information Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy; Email: isabella.lancellotti@unimore.it
Abstract: The average glass recycling rate in 2016 in the EU28 zone has reached the 74% threshold for the first time [1]. This means that over 11.6 million tons were collected throughout the European Union in 2014 or 3.5% more than in the previous year. The majority of that goes back into making new packaging: glass stands alone as the most closed loop recycled food and drink packaging in the EU and in the world. Nevertheless, about 1% of this recycled glass is discarded by the automatic selecting machinery and founds its way to the disposal. In the present project, a geopolymer matrix based on alkali activated metakaolin has been used to blend in fine powder of this waste glass which cannot be directed to glass melting furnaces. Such waste glass present impurities such as lead and barium which are safely incorporated into a geopolymer matrix. The consolidation of the geopolymeric matrix containing the waste glass was followed by pH and conductibility till 28 days of curing. SEM/EDS observations were useful to obtain information on microstructure of the consolidated products. Citotossicity tests indicated complete de-toxification of the waste glass.

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