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Effective Coating Barriers for Protection of Reinforced Concrete, 2nd Edition
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Effective Coating Barriers for Protection of Reinforced Concrete, 2nd Edition

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: 20 April 2025 | Viewed by 2204

Special Issue Editors

Dr. Junjie Wang

E-Mail Website
Guest Editor
College of Civil Engineering, Tsinghua University, Bei**g 100084, China
Interests: sustainable building materials with low CO2 emissions and low energy costs (such as recycled cement, geopolymer concrete, and recycled aggregate concrete); highly durable and high-performance concrete in marine environments; non-destructive testing methods for concrete structures
Special Issues, Collections and Topics in MDPI journals
Dr. Hongwei Lin

E-Mail Website
Co-Guest Editor
School of Civil Engineering, Bei**g Jiaotong University, Bei**g 100044, China
Interests: interfacial behavior of RC and composite structures; finite element simulation of interfacial behavior; mechanical performance of corroded RC structures; structural use of advanced materials; seismic performance of composite structures

Special Issue Information

Dear Colleagues,

Concrete has become the most widely used construction material since its invention. Working together with steel inside concrete, reinforced concrete can withstand both compressive and tension forces. The requirements for concrete raw materials, such as natural stones and river sand, have been increasing, especially in developed countries where massive amounts of infrastructure are being built. The consumption of these materials is incredibly rapid, and in some cases, they already have a limited local supply. This trend certainly promotes the requirement for a longer service life of reinforced concrete structures.

Reinforced concrete structures can be subjected to different environmental actions, for example, steel corrosion in concrete can be caused by chloride ions from marine environments and where deicing salts are used, and carbonation by CO2 in the atmosphere. Immersed concrete structures could suffer from sulfate attack when sulfate ions are present in the surrounding water. Corrosion of steel in concrete has become the most important durability and safety concern for reinforced concrete structures. Additionally, cracks may facilitate the ingress of these harmful substances into concrete and thereby accelerate the corrosion process of steel. All of these affect the service life of reinforced concrete structures.

Effective coating barriers could provide protection to reinforced concrete in withstanding the effects of harmful substances. Effective coating barriers include coatings on concrete surfaces and steel surfaces. The coatings on concrete surface could be silane or other waterproof materials that prevent the ingress of water. The coating on the steel surface could be epoxy, which isolates the steel from harmful substances. Other innovative coatings could also be applied. There is an urgent demand to understand the performance of these coatings, especially their long-term performance, including in terms of bonding loss, degradation, etc.

  • In particular, topics of interest include but are not limited to the following:
  • Long-term performance of coatings on steel or concrete surfaces in reinforced concrete;
  • Degradation mechanisms of coatings;
  • Epoxy coatings on steel in concrete;
  • Silane coatings on concrete surfaces;
  • Innovative coatings on concrete surface, such as waterproof coatings, breathable coatings, etc.

Dr. Junjie Wang
Guest Editor

Dr. Hongwei Lin
Co-Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at mdpi.longhoe.net 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. Coatings is an international peer-reviewed open access monthly 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
  • epoxy coatings
  • protective coating
  • innovative coatings

Related Special Issue

Published Papers (2 papers)

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Research

12 pages, 9264 KiB  
Article
Effect of the Pretreatment on the Properties of Cement-Based Recycled Powder
by Jianglin Li, Yuan Feng, Huaicheng Zhong, Baifa Zhang, Junjie Wang, Bin Zhang and Jianhe **e
Coatings 2024, 14(1), 107; https://doi.org/10.3390/coatings14010107 - 13 Jan 2024
Cited by 1 | Viewed by 930
Abstract
Three pretreatment methods including calcination, carbonization, and a carbonization-calcination combined pretreatment were studied to understand the pretreatment mechanisms for cement-based recycled powder (CRP). The mineral and microstructure of the CRP sample were investigated through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermal gravity [...] Read more.
Three pretreatment methods including calcination, carbonization, and a carbonization-calcination combined pretreatment were studied to understand the pretreatment mechanisms for cement-based recycled powder (CRP). The mineral and microstructure of the CRP sample were investigated through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermal gravity (TG) analysis, and scanning electron microscopy (SEM) after exposure to different thermal temperatures (400 °C, 600 °C, and 800 °C), carbonization times (6 h, 1 d, and 3 d), and pre-carbonization for 1 d followed by heating at 800 °C. The results showed that the optimal thermal pretreatment temperature was approximately 720–800 °C. Through the process of calcination, the C-S-H, Ca(OH)2, and CaCO3 minerals in the CRP sample underwent decomposition to produce CaO or C2S. During carbonation, the pretreatment not only results in the increased production of CaCO3 owing to the reaction of the C-S-H gel and Ca(OH)2 with CO2, but also enhances its properties and the strength of chemical bond between CaCO3 and the post-hydration products. Both CaCO3 and CaO were present after the combined pretreatment, which indicates that the CaCO3 mineral formed superior stability after it had been pre-carbonated. Due to fewer impurities in CRP, the positive effect of the pretreatment on CRP was significantly better than that on recycled powder derived from construction and demolition waste. Full article
(This article belongs to the Special Issue Effective Coating Barriers for Protection of Reinforced Concrete, 2nd Edition)
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22 pages, 10045 KiB  
Article
Influence of Combined Air-Entraining Superplasticizer and Surface Treatments on Airport Pavement Concrete against Salt Freezing
by Molan Li, Yong Lai, Daoxun Ma, Junjie Wang, Lei Xu, Zhibin Gao, Yan Liu, Le Li, Yaopu Guo, Lifan Zheng and Yi Zhang
Coatings 2023, 13(2), 372; https://doi.org/10.3390/coatings13020372 - 6 Feb 2023
Cited by 2 | Viewed by 1231
Abstract
Effective improvement of the frost resistance of concrete in cold regions is critical for the durability of airport pavement concrete in plateau. This paper intends to contribute to a better knowledge of the effects of combined air-entraining superplasticizer and surface treatments on the [...] Read more.
Effective improvement of the frost resistance of concrete in cold regions is critical for the durability of airport pavement concrete in plateau. This paper intends to contribute to a better knowledge of the effects of combined air-entraining superplasticizer and surface treatments on the resistance against freezing-thawing and salt freezing. First, an optimum mixing by considering w/c, cement content, sand ratio, and air-entraining superplasticizer was obtained by comparing compressive and flexural strength, microstructure, pore distribution, and resistance to freezing-thawing of different mixes. From the results, a concrete mix with air-entraining superplasticizer, w/c = 0.4, cement amount at 330 kg/m3, and sand ratio = 0.3 was selected for airport pavement. Then, this mix was subjected to salt freezing with different surface treatments (smoothing, brushing, spraying with silane, and impregnating with silane), and the spalled mass loss in salt freeze cycles was reported. The results show that combined use air-entraining superplasticizer and surface treatments can provide an obvious improvement on the resistance to salt freezing. Compared to silane impregnation, surface treatment by silane spraying performed much better in early time. Full article
(This article belongs to the Special Issue Effective Coating Barriers for Protection of Reinforced Concrete, 2nd Edition)
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