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Special Issue "Surface Modified Repairing Materials and Mechanics"

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A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: 29 February 2024 | Viewed by 2977

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Special Issue Editors

Dr. Lin Wang

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Guest Editor

School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China
Interests: surface modified materials; high performance concrete; cement-based materials; concrete durability; surface chemistry

Dr. Rui Liu

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Guest Editor

School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
Interests: cement-based materials; civil engineering; artificial intelligence
Special Issues, Collections and Topics in MDPI journals

Dr. Jin Yang

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Guest Editor

1. School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China
2. Building Waterproof Engineering and Technology Research Center, Hubei University of Technology, Wuhan 430068, China
Interests: solid waste processing and utilization in civil engineering; CO₂ capture; utilization and storage in building materials; ultra-high performance concrete technologies; 3D printed building material
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to invite you to contribute your research to our Special Issue “Surface Modified Repairing Materials and Mechanics”.

The surface performance of repairing materials is very important for this kind of material. At present, the repairing materials used in road engineering are mainly asphalt and cement-based materials. In order to promote the bonding properties of the repairing materials, we launch this new Special Issue of Coatings that will collect original research articles and review papers. The contribution will focus on the application of surface-modified repairing materials and will emphasize the intersection and application of covered disciplines in repairing engineering.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: the preparation, mechanical properties, durability and mechanism analysis of surface-modified repairing materials.

We look forward to receiving your contributions.

Dr. Lin Wang
Dr. Rui Liu
Dr. Jin Yang
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 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

surface modified
repairing materials
bonding performances
cement-based materials
road engineering

Published Papers (4 papers)

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Research

Open AccessArticle

The Working Performance and Mechanical Strength of Reactive Powder Concrete with the CO₂ Curing Method on the Surface of Secondary Aluminum Ash

and

Coatings 2023, 13(8), 1377; https://doi.org/10.3390/coatings13081377 - 05 Aug 2023

Viewed by 634

Abstract

Secondary aluminum ash (SAA) is a common waste that, without reasonable treatment, results in pollution to the environment. A large amount of CO₂ is emitted by human activities every day. If the CO₂ cannot be treated in a timely manner, it will accelerate the greenhouse effect and pollute the environment. The CO₂ curing on the surface of SAA can reduce excess CO₂ emissions while improving the performance of the SAA. The application of CO₂-cured SAA can simultaneously consume the emitted CO₂ and solidify the SAA. In this article, the effect of CO₂-cured secondary aluminum ash on the rheological properties, the initial setting time, the flexural strength (f_t), the compressive strength (f_cu) of reactive powder concrete (RPC), and the corresponding dry shrinkage rate (DSR) are investigated. Meanwhile, the capillary water absorption, the chloride ion migration coefficient (CMC), and the carbonization depth of RPC are determined. Scanning electron microscope (SEM) and the X-ray diffraction spectrum curves are selected to reveal the mechanism of the macro performance. Results indicate that CO₂-cured secondary aluminum ash can increase the fluidity and decrease the plastic viscosity of fresh RPC. The initial setting time is increased by the CO₂ curing. CO₂-cured secondary aluminum ash can increase the f_t and f_cu by (0%~26.3% and 0% to 68.7%), respectively. The DSR is increased by adding secondary aluminum ash with an increasing rate of 0% to 91.3%. The capillary water absorption of RPC increases in the form of a linear function. The CMC and the carbonization depth of RPC are decreased by adding the CO₂-cured secondary aluminum ash with decreasing rates of 0%~46.7% and 0%~45.7%. The CO₂-cured secondary aluminum ash can make the hydration more compact and increased increase the hydration products (Ca(OH)₂). Full article

(This article belongs to the Special Issue Surface Modified Repairing Materials and Mechanics)

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Open AccessArticle

The Mechanical and Self-Sensing Performance of Reactive Powder Cement Concrete with Nano-Stainless Steel Powder

and

Coatings 2023, 13(7), 1153; https://doi.org/10.3390/coatings13071153 - 26 Jun 2023

Viewed by 666

Abstract

In order to prepare cement concrete with high mechanical properties and durability, nano-stainless steel powder reactive powder cement concrete (RPC) was manufactured. The dosage of nano-stainless steel powder ranged from 0% to 1.2% by the total volume of the RPC. In this study, the compressive and flexural strengths of the RPC with nano-stainless steel powder were determined, the dry shrinkage rate of the RPC was tested and the electrical resistance and alternating current (AC) impedance spectrum of the RPC were measured; moreover, the corresponding strain-sensing properties were investigated, and the scanning electron microscope (SEM) was used for observing the microstructures of the RPC. The results showed that the RPC with 1.0% nano-stainless steel powder exhibited the threshold values of the mechanical strengths. The maximum flexural strength and compressive strength were 16.1% and 14.2% higher than the minimum values. The addition of the nano-stainless steel powders reduced the dry shrinkage rate by 12.1%–39.8%. The electrical resistance of the RPC decreased in the form of the cubic function with the volume fraction of the stainless steel powders. The 1.0% nano-stainless steel powder was the threshold value for the electrical resistance and piezoresistive performance. The relationship between the electrical reactance and electrical resistance fitted well with the quadratic function. As obtained from the SEM results, the addition of the nano-stainless steel powder could effectively improve the compactness of the hydration products. Full article

(This article belongs to the Special Issue Surface Modified Repairing Materials and Mechanics)

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Open AccessArticle

The Influence of CO₂-Cured Boiler Cinder on the Mechanical Strength of RPC Exposed to NaCl Erosion

Ligai Bai

Haiyuan Liu

and

Hui Wang

Coatings 2023, 13(6), 1021; https://doi.org/10.3390/coatings13061021 - 31 May 2023

Viewed by 611

Abstract

Boiler cinder is a kind of mining waste that may cause environmental pollution. Based on this reason, a processing method needs to be carried out. In this study, the influence of CO₂-cured boiler cinder on the compressive and flexural strengths of reactive powder cement concrete (RPC) under NaCl actions is investigated. The mass loss rates (MLR) and the relative dynamic modulus of elasticity (RDME) are measured to reflect the resistance of NaCl erosion. The thermogravimetric analysis (TGA), scanning electron microscope (SEM), and X-ray diffraction (XRD) spectrum are obtained for revealing the mechanism of the macro performance. Results show that the relationship between the MLR and the mass ratio of CO₂-cured boiler cinder fits the quadratic function with NaCl erosion. Meanwhile, the MLR during NaCl action are decreased by increasing the amount of CO₂-cured boiler cinder. The MLR range from 0% to 5.3% during NaCl action, and the decreasing rate of MLR by CO₂ curing on boiler cinder is 0%–51.3%. The function of RDME and the mass ratio of CO₂-cured boiler cinder accords with the positive correlation quadratic function. The mechanical strengths decrease when NaCl erosion is encountered. The mechanical strengths’ decreasing rates of RPC are elevated with the increasing number of NaCl freeze–thaw cycles and the NaCl dry–wet alternations. The increasing rates of flexural and compressive strengths of RPC by 13.1%–36.3% and 11.2%–50.4% are achieved by adding CO₂-cured boiler cinder. As observed from the TGA and SEM’s results, the addition of CO₂-cured boiler cinder can increase the thermogravimetric value and the compactness of hydration products. Full article

(This article belongs to the Special Issue Surface Modified Repairing Materials and Mechanics)

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Open AccessArticle

The Influence of Iron Tailings Powder on the Properties on the Performances of Cement Concrete with Machine-Made Sand

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Coatings 2023, 13(5), 946; https://doi.org/10.3390/coatings13050946 - 18 May 2023

Viewed by 812

Abstract

Iron tailings powder (ITP) is a kind of solid waste, which pollutes the environment, without any treatment. The application of ITP in cement concrete is a good choice. In this study, the influence of ITP on the flowability, compressive strength, chloride ion permeability and the attenuation of the performance of cement concrete during freeze–thaw cycle (F-T) damage are investigated. An X-ray diffraction, an analysis of the pores and a scanning electron microscope (SEM) are obtained to analyze the mechanism of cement concrete’s performance. The results show that the addition of ITP can decrease the flowability of fresh cement concrete. Cement concrete with a 7% ITP to mass ratio of the total aggregate shows the highest compressive strength and the minimum chloride ion permeability. The relative dynamic modulus of the elasticity of the specimens with 7% ITP during the F-T is the highest. The corresponding mass loss rate is the lowest. The mercury intrusion analysis results show that the pore volume of the specimens with 7% ITP is the lowest. The SEM results confirm that the specimens with 7% ITP show the densest microstructures. Full article

(This article belongs to the Special Issue Surface Modified Repairing Materials and Mechanics)

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