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Coatings
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Surface Modified Repairing Materials and Mechanics
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Surface Modified Repairing Materials and Mechanics

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 6825

Special Issue Editors

Dr. Lin Wang

E-Mail Website
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

E-Mail Website
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

E-Mail Website
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

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

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Research

17 pages, 8748 KiB  
Article
The Properties of Ultra-High-Performance Concrete with Assembly Unit of Secondary Aluminum Dross and Waste Fly Ash
by Houchao Sun, Feiting Shi and Hui Wang
Coatings 2024, 14(1), 89; https://doi.org/10.3390/coatings14010089 - 9 Jan 2024
Cited by 1 | Viewed by 1553
Abstract
Waste fly ash (WFA) and secondary aluminum dross (SAD) are common solid wastes inducing environmental pollution. These materials contain certain active substances that can be used in cement-based materials. Therefore, cement concrete can be used to solidify these solid wastes. In this study, [...] Read more.
Waste fly ash (WFA) and secondary aluminum dross (SAD) are common solid wastes inducing environmental pollution. These materials contain certain active substances that can be used in cement-based materials. Therefore, cement concrete can be used to solidify these solid wastes. In this study, the influence of the assembly unit of secondary aluminum dross (SAD) and waste fly ash (WFA) on the properties of ultra-high-performance concrete (UHPC) is investigated. The slump flow, the plastic viscosity, the yield shear stress, and the initial setting time of fresh UHPC are measured. Moreover, the flexural and compressive strengths and the dry shrinkage rate (DSR) are determined. The electrical resistance and reactance are tested. The electron microscopy spectroscopy (EDS), thermogravimetric analysis (TG), and X-ray diffraction spectrum (XRD) curves are obtained for revealing the mechanism of macroscopic performances. Results show that due to the optimal specific surface area and the volcanic ash effect, the UHPC with the assembly unit of 50% SAD and 50% WFA provides the highest slump flow, DSR, and mechanical strengths, while the corresponding plastic viscosity, yield shear stress, and electrical resistance are the lowest. The SAD can delay the setting time of UHPC. The relationship between the electrical resistance or the electrical reactance and the mass ratio of SAD accords with the quadratic function. The corresponding electrical resistance is the lowest. The relationship between the mechanical strengths and the electrical resistance fits with the cubic function. The leaching amounts of Zn and Cr increase in the form of cubic function with the immersing time. Meanwhile, the SAD can decrease the Zn and Cr by 0%–46.3% and 0%–45.2% respectively. As obtained from the EDS results, the element of Al is increased by adding SAD. The XRD curves show that the crystals of Al2O3 are increased and the SiO2 crystals are decreased by the added SAD. UHPC with 50% SAD exhibits the highest compact microstructures and the least Ca(OH)2 and 3CaO·SiO2 hydration products. The TG results show that UHPC with 50% SAD shows the lowest TG values of all the groups. This research will provide new UHPC materials and techniques applied in solidifying the WFA and SAD in the future. Full article
(This article belongs to the Special Issue Surface Modified Repairing Materials and Mechanics)
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14 pages, 7532 KiB  
Article
The Working Performance and Mechanical Strength of Reactive Powder Concrete with the CO2 Curing Method on the Surface of Secondary Aluminum Ash
by Peng Tang, Xin Cai, Hui Wang and Feiting Shi
Coatings 2023, 13(8), 1377; https://doi.org/10.3390/coatings13081377 - 5 Aug 2023
Viewed by 1465
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 [...] Read more.
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 (ft), the compressive strength (fcu) 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 ft and fcu 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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12 pages, 5732 KiB  
Article
The Influence of CO2-Cured Boiler Cinder on the Mechanical Strength of RPC Exposed to NaCl Erosion
by Ligai Bai, Haiyuan Liu and Hui Wang
Coatings 2023, 13(6), 1021; https://doi.org/10.3390/coatings13061021 - 31 May 2023
Cited by 1 | Viewed by 1438
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 [...] Read more.
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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14 pages, 7137 KiB  
Article
The Influence of Iron Tailings Powder on the Properties on the Performances of Cement Concrete with Machine-Made Sand
by Lin Wang, Genkun Du, Xinxin He, Zicheng Wei, Yubo Xu, Shuai Li and Xuejuan Liu
Coatings 2023, 13(5), 946; https://doi.org/10.3390/coatings13050946 - 18 May 2023
Viewed by 1835
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 [...] Read more.
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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