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Concrete Microstructure and Service Life Prediction
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Concrete Microstructure and Service Life Prediction

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 June 2021) | Viewed by 4077

Special Issue Editor

Prof. Dr. Yukio Hama

E-Mail Website
Guest Editor
Muroran Institute of Technology, Muroran, Japan
Interests: pore structure; frost resistance; service life prediction; industrial by-products using; nano-structure changes

Special Issue Information

Dear Colleagues,

Microstructure is an important factor affecting the properties of concrete, such as mechanical properties and durability, in which durability is most likely to relate to the service life of concrete. Therefore, the aim of this Special Issue is to publish original research, which adds knowledge to cover recent research in the field of concrete microstructure through the approaches of service life prediction. A wide range of research results on various topics that define the cornerstones of this particular field is expected. The scope includes but is not limited to the following:

  • Microstructure characterization techniques (includes nuclear magnetic resonance (NMR), Nitrogen and water vapor adsorption, mercury intrusion porosimetry (MIP), under-water weighing, and others);
  • Concrete mix design for microstructure improving and enhanced durability;
  • Hydration and microstructural modeling (cement paste, concrete);
  • Durability of concrete (e.g., frost damage, carbonation, corrosion damage, bio-degradation, chemical attack, and others);
  • Prediction model of durability and service life of concrete; the mathematical formulation of the model.

It is my pleasure to announce and invite you to submit a manuscript to Special Issue "Concrete Microstructure and Service Life Prediction". Original research papers are accepted in the form of research articles, communications, and critical reviews are welcome.

Prof. Dr. Yukio Hama
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

  • service life
  • durability and aging materials
  • microstructure
  • predictive model
  • concrete characterization

Published Papers (2 papers)

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Research

15 pages, 25634 KiB  
Article
Automated Distinction between Cement Paste and Aggregates of Concrete Using Laser-Induced Breakdown Spectroscopy
by Pakdad Pourbozorgi Langroudi, Gesa Kapteina and Marcus Illguth
Materials 2021, 14(16), 4624; https://doi.org/10.3390/ma14164624 - 17 Aug 2021
Cited by 6 | Viewed by 1950
Abstract
Laser-induced breakdown spectroscopy (LIBS) is a technique which enables the analysis of material components with precision and spatial resolution. Furthermore, the investigation method is comparatively fast which enables illustrating the distribution of elements within the examined material. This opens new possibilities for the [...] Read more.
Laser-induced breakdown spectroscopy (LIBS) is a technique which enables the analysis of material components with precision and spatial resolution. Furthermore, the investigation method is comparatively fast which enables illustrating the distribution of elements within the examined material. This opens new possibilities for the investigation of very heterogeneous materials, such as concrete. Concrete consists of cement, water, and aggregates. As most of the transport processes take place exclusively in the hardened cement paste, relevant limit values linked to harmful element contents are specified in relation to the cement mass. When a concrete sample from an existing structure is examined, information on the concrete composition is usually not available. Therefore, assumptions have to be made to convert the element content analyzed in the sample based on the cement content in the sample. This inevitably leads to inaccuracies. Therefore, a method for distinction between cement paste and aggregates is required. Cement and aggregate components are chemically very close to each other and therefore, complex for classification. This is why the consideration of a single distinguishing feature is not sufficient. In this paper, a machine learning method is described and has been used to automate the distinction of the cement paste and aggregates of the LIBS data to receive reliable information of this technique. The presented approach could potentially be employed for many heterogeneous materials with the same complexity to quantify the arbitrary substances. Full article
(This article belongs to the Special Issue Concrete Microstructure and Service Life Prediction)
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16 pages, 5888 KiB  
Article
Variation in Service Life on RC Structure According to Concrete Binder Type
by JangHyun Park, JinHo Park and MyeongGyu Jung
Materials 2020, 13(23), 5430; https://doi.org/10.3390/ma13235430 - 28 Nov 2020
Cited by 1 | Viewed by 1560
Abstract
When an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and [...] Read more.
When an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and it deteriorates the performance of the passive film formed on the surface of the rebars embedded in the concrete. Therefore, in this study, the service lives of reinforced concrete containing different types of concrete binders were predicted and compared. The chloride ion diffusion coefficients of concretes with various binders were measured, and the critical chloride content of the rebar was assessed by the real-time monitoring on the corrosion initiation time of the rebar embedded in concrete. Moreover, Fick’s 2nd law was applied to predict when the chloride content at the 40 mm depth of cover reached the critical chloride content based on the chloride ion diffusion coefficient. It was observed that the service life of S6 (OPC 40% + GGBFS 60%) was the highest, followed by TBC (OPC 40% + GGBFS 40% + FA 20%), S3 (OPC 70% + GGBFS 30%), and OPC (OPC 100%). Full article
(This article belongs to the Special Issue Concrete Microstructure and Service Life Prediction)
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