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Effects of Concrete Degradation on Gas Transfer Properties
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Effects of Concrete Degradation on Gas Transfer Properties

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 7442

Special Issue Editor

Prof. Frédéric Skoczylas

E-Mail Website
Guest Editor
Laboratory of Mechanics, Multiphysics, Multiscale, Université de Lille, Lille, France
Interests: nuclear waste storage; safety of nuclear confining structures; transfer properties of porous materials (rocks, concrete, polymers, etc.) and especially gas permeability; poromechanical couplings

Special Issue Information

Dear Colleagues,

This Special Issue, “Effects of Concrete Degradation on Gas Transfer Properties”, will address the crucial problem of concrete durability and its degradation due to different causes, such as mechanical, chemical, thermal, etc. From a general point of view, these loadings may lead to changes in concrete mechanical properties and/or transfer properties (gas or water permeability, porosity, diffusivity). These changes are serious issues for structures intended for confining or storage of dangerous materials, immersed tunnel, dams or every structure that must ensure sealing properties. On the other hand, transfer property evolutions (especially gas permeability) are very useful tools to evaluate concrete degradation levels and to provide additional information on mechanical damage, i.e., cracking of materials. As a result, they can help to model or to evaluate material damage. Original papers and studies are solicited on these particular topics. Experiments and modelings, mainly dealing with gas permeability at different scales (structural or material) as well as diffusivity and liquid permeability, in relation to material degradation (cracking, lixiviation, carbonation, etc.), are welcome.

Prof. Frédéric Skoczylas
Guest Editor

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 submissions that pass pre-check are 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. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). 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

  • Concrete
  • Cementitious materials
  • Degradation
  • Cracking
  • Gas permeability
  • Porosity
  • Transfer properties
  • Experiments and modeling
  • Tightness

Published Papers (3 papers)

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Research

18 pages, 5484 KiB  
Article
pH-Triggered Release Performance of Microcapsule-Based Inhibitor and Its Inhibition Effect on the Reinforcement Embedded in Mortar
by Jinzhen Huang, Yangyang Zhu, Yuwei Ma, Jie Hu, Haoliang Huang, Jiangxiong Wei and Qijun Yu
Materials 2021, 14(19), 5517; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14195517 - 23 Sep 2021
Cited by 5 | Viewed by 1689
Abstract
The smart release of healing agents is a key factor determining the inhibition efficiency of microcapsules-based corrosion inhibitors for reinforced concrete. In this study, the release behavior of benzotriazole (BTA) in microcapsule-based inhibitors was investigated in mortar sample to clarify the influence of [...] Read more.
The smart release of healing agents is a key factor determining the inhibition efficiency of microcapsules-based corrosion inhibitors for reinforced concrete. In this study, the release behavior of benzotriazole (BTA) in microcapsule-based inhibitors was investigated in mortar sample to clarify the influence of different hydration products on the release process. The results indicated that under high pH environment (pH > 12.4), only about 5% reserved BTA was released from the mortar sample. pH drop resulted in the increased release of BTA from mortar sample. Most BTA in the microcapsule-based inhibitors was released from mortar sample in low pH environment, which was closely related to morphology/composition alterations of hydration products caused by pH drop of the environment. The smart release of BTA dramatically delayed corrosion initiation of reinforced mortar and halted corrosion product accumulation on the steel surface. Therefore, the corrosion resistance of the reinforced mortar was improved after corrosion initiation. Full article
(This article belongs to the Special Issue Effects of Concrete Degradation on Gas Transfer Properties)
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15 pages, 2249 KiB  
Article
Clay Ceramic Waste as Pozzolan Constituent in Cement for Structural Concrete
by Everton dos Santos Barreto, Karina Vaz Stafanato, Markssuel Teixeira Marvila, Afonso Rangel Garcez de Azevedo, Mujahid Ali, Ronald Matheus Lobo Pereira and Sérgio Neves Monteiro
Materials 2021, 14(11), 2917; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14112917 - 28 May 2021
Cited by 62 | Viewed by 3709
Abstract
Ceramic-based wastes generated from different industrial activities have increasingly been reused as construction material incorporated into concrete. In general, these wastes just replace common concrete aggregates such as sand and gravel. In the present work, waste from clay brick industries composted of kaolinite [...] Read more.
Ceramic-based wastes generated from different industrial activities have increasingly been reused as construction material incorporated into concrete. In general, these wastes just replace common concrete aggregates such as sand and gravel. In the present work, waste from clay brick industries composted of kaolinite minerals were for the first time evaluated for their potential to be reused as the pozzolan constituent of a cement for structural concrete. Initial standard testes revealed that the clay ceramic waste (CCW) displays high pozzolanicity. Concrete was then produced with 10 and 20 wt.% of CCW mixed with ordinary Portland cement (OPC) as its pozzolan constituent. Compression strength of these concretes and of pure OPC as a control sample were determined in standard tests after 14 and 28 days of curing. In addition, the corresponding density, water absorption, capillarity and percentage of voids were measured together with the evaluation of microstructural indices by scanning electron microscopy. The initial tests confirmed that the CCW is indeed an effective pozzolanic potential due to a chemical effect by reacting with CH to generate C–S–H. Moreover, the technological results proved that CCW might effectively replace the pozzolan cement constituent for structural concrete. Full article
(This article belongs to the Special Issue Effects of Concrete Degradation on Gas Transfer Properties)
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18 pages, 6575 KiB  
Article
Permeability of a Macro-Cracked Concrete Effect of Confining Pressure and Modelling
by Wei Chen, Yixuan Han, Franck Agostini, Frederic Skoczylas and Didier Corbeel
Materials 2021, 14(4), 862; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14040862 - 11 Feb 2021
Cited by 10 | Viewed by 1498
Abstract
The effects of confining pressure are investigated for two samples of a macro-cracked concrete. Samples are first macro-cracked with a splitting tensile strength test (Brazilian) technique. Gas permeability is continually measured under increasing (or decreasing) confining pressure, whereas crack closure (or opening) is [...] Read more.
The effects of confining pressure are investigated for two samples of a macro-cracked concrete. Samples are first macro-cracked with a splitting tensile strength test (Brazilian) technique. Gas permeability is continually measured under increasing (or decreasing) confining pressure, whereas crack closure (or opening) is recorded with an LVDT (Linear Variable Differential Transformer) device. Despite a mechanical closure of the macro-crack, identified at around 20 MPa confining pressure, gas permeability continues to decrease as confinement is increased. This means that a model of the macro-crack by two parallel planes (using Poiseuille law) cannot be used to represent permeability variations during closure (or opening) of cracks. As a consequence, a physical model is designed in order to simulate with a better consistency the real behaviour of the macro-crack. This simple modelling allows both behaviours, mechanical and hydraulic, under confining pressure, to be simulated with the same set of parameters. Full article
(This article belongs to the Special Issue Effects of Concrete Degradation on Gas Transfer Properties)
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