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Strengthening and Rehabilitation of Concrete and Masonry Structures
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Strengthening and Rehabilitation of Concrete and Masonry Structures

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

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 1936

Special Issue Editors

Dr. Akram Jawdhari

E-Mail Website
Guest Editor
Department of Civil & Environmental Engineering, South Dakota State University, Crothers Engineering Hall 301, Box 2219, Brookings, SD 57007, USA
Interests: sustainable, smart materials and systems; infrastructure assessment and rehabilitation; bridge engineering; structural health monitoring; computational modeling
Special Issues, Collections and Topics in MDPI journals
Dr. Alaa Elsisi

E-Mail Website
Guest Editor
Civil Engineering, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA
Interests: structural joints; numerical methods; composite materials; blast performance; fatigue and fracture; seismic design
Dr. Majid M. A. Kadhim

E-Mail Website
Guest Editor
College of Engineering, University of Babylon, Hilla, Iraq
Interests: dynamic analysis; finite element modeling; rehabilitation of structures; structural health monitoring; composite materials
Dr. Zuhair Al-Jaberi

E-Mail Website
Guest Editor
Civil Engineering Department, Al-Nahrain University, Baghdad, Iraq
Interests: composite structural materials; sustainable materials; masonry structures; struc-tural strengthening and repair

Special Issue Information

Dear Colleagues,

A large number of structures that provide essential services to the public and enable societal development are aging and are in dire need of rehabilitation or reconstruction. Concrete and masonry, two of the most widely used materials in structures, are degrading at an unprecedented rate because of reinforcement corrosion, natural events (e.g., earthquakes and tornados), vehicular and barge impacts, errors in design and/or in construction, the use of inferior materials in construction, changes in function, and updates to design codes. Structural rehabilitation offers multiple advantages over replacement including cost savings (in certain applications), less disruption to the structure’s function, and a much lower environmental impact. The Special Issue aims to advance and disseminate knowledge on the rehabilitation of concrete and masonry structures. The scope of this SI includes, but is not limited to, rehabilitation materials and techniques (e.g., fiber reinforced polymer (FRP), textile reinforced mortar (TRM), steel, and ultra-high performance concrete (UHPC), shape memory alloy (SMA)), application type (e.g., flexure, shear, torsion, and axial confinement), bond and interfacial properties, durability and environmental effects, long term behavior, codes and standards, sustainable and green materials and systems, and seismic strengthening. Original articles that present experimental, numerical, or analytical investigations as well as emblematic case studies and state-of-the-art reviews are welcomed.

Dr. Akram Jawdhari
Dr. Alaa Elsisi
Dr. Majid M. A. Kadhim
Dr. Zuhair Al-Jaberi
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. 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

  • rehabilitation and strengthening
  • retrofit
  • reinforced and prestressed concrete
  • masonry
  • UHPC
  • FRP

Published Papers (2 papers)

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Research

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15 pages, 9332 KiB  
Article
Mechanical Properties of Fiber-Reinforced Permeable Geopolymer Concrete
by Lina Xu, Qilong Liu, Xu Ding, Shuang Sun and Zhanfang Huang
Materials 2023, 16(17), 6030; https://doi.org/10.3390/ma16176030 - 01 Sep 2023
Cited by 1 | Viewed by 780
Abstract
In this paper, permeable geopolymer concrete with high compressive strength and permeability is prepared using alkali-activated metakaolin as a slurry, and its mechanical properties are reinforced by adding steel fibers. The influencing factors of the strength, porosity and permeability coefficient of the fiber-reinforced [...] Read more.
In this paper, permeable geopolymer concrete with high compressive strength and permeability is prepared using alkali-activated metakaolin as a slurry, and its mechanical properties are reinforced by adding steel fibers. The influencing factors of the strength, porosity and permeability coefficient of the fiber-reinforced permeable geopolymer concrete, as well as its microstructure and curing mechanism, are determined by conducting an unconfined compressive strength test, scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. The test results show that, under the water permeability required to meet the specification conditions, when the alkali activator modulus is 1.4 and the activation-to-solid ratio is 0.9, the effect of metakaolin activation is the most obvious, and the unconfined compressive strength of the permeable geopolymer concrete is the highest. Moreover, the paste formed via the alkali activation of metakaolin contains a large number of silica–oxygen and aluminum–oxygen bonds with a dense and crack-free structure, which enables the paste to tightly combine with the aggregates; the strength of the permeable geopolymer concrete is early strength, and its strength at a curing age of 3 days is the highest. The strength at a curing age of 3 days can reach 43.62% of the 28-day strength; the admixture of steel fiber can effectively improve the strength of the permeable concrete, and with an increase in the amount of admixture, the strength of the fiber shows a trend of increasing, and then decreasing. Under the conditions of this test, a volume of steel fiber of 0.3% enables the optimum unconfined compressive strength to be reached. Full article
(This article belongs to the Special Issue Strengthening and Rehabilitation of Concrete and Masonry Structures)
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Review

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38 pages, 6246 KiB  
Review
A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions
by Muhammad Hammad, Alireza Bahrami, Sikandar Ali Khokhar and Rao Arsalan Khushnood
Materials 2024, 17(6), 1408; https://doi.org/10.3390/ma17061408 - 19 Mar 2024
Viewed by 767
Abstract
In the pursuit of creating more sustainable and resilient structures, the exploration of construction materials and strengthening methodologies is imperative. Traditional methods of relying on steel for strengthening proved to be uneconomical and unsustainable, prompting the investigation of innovative composites. Fiber-reinforced polymers (FRPs), [...] Read more.
In the pursuit of creating more sustainable and resilient structures, the exploration of construction materials and strengthening methodologies is imperative. Traditional methods of relying on steel for strengthening proved to be uneconomical and unsustainable, prompting the investigation of innovative composites. Fiber-reinforced polymers (FRPs), known for their lightweight and high-strength properties, gained prominence among structural engineers in the 1980s. This period saw the development of novel approaches, such as near-surface mounted and externally bonded reinforcement, for strengthening of concrete structures using FRPs. In recent decades, additional methods, including surface curvilinearization and external prestressing, have been discovered, demonstrating significant additional benefits. While these techniques have shown the enhanced performance, their full potential remains untapped. This article presents a comprehensive review of current approaches employed in the fortification of reinforced cement concrete structures using FRPs. It concludes by identifying key areas that warrant in-depth research to establish a sustainable methodology for structural strengthening, positioning FRPs as an effective replacement for conventional retrofitting materials. This review aims to contribute to the ongoing discourse on modern structural strengthening strategies, highlight the properties of FRPs, and propose avenues for future research in this dynamic field. Full article
(This article belongs to the Special Issue Strengthening and Rehabilitation of Concrete and Masonry Structures)
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