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Developments in Fiber-Reinforced Cement
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Developments in Fiber-Reinforced Cement

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 June 2023) | Viewed by 5575

Special Issue Editors

Dr. Antonio C. Azevedo

E-Mail Website
Guest Editor
Department of Civil Engineering; Faculty of Engineering; University of Porto, Porto, Portugal
Interests: clay materials; civil engineering; concrete; masonry; construction waste; hygrothermal behavior; composites
Dr. João Quesado Delgado

E-Mail Website
Guest Editor
Faculty of Engineering, University of Porto, 4099-002 Porto, Portugal
Interests: energy; efficient buildings; sustainability; porous media; heat transfer; mass transfer; fluid flow; drying and wetting; moisture transport; numerical simulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Fiberglass-reinforced concrete composites have shown strict advantages in the last years of the 20th century due to several technological developments involving the matrix, the fiber, the interface, the composite production process, and the underestimation of the mechanisms that control their particular behavior. The advantages are well known, such as higher tensile strength, durability, impact, fatigue, freeze and thaw resistance, and lower crack growth.

In recent years, problems related to environmental issues have motivated extensive scientific research into materials that have less impact on the environment. The use of fibers obtained from renewable plant sources in composite materials has been an object of growing interest. A combination of good mechanical and physical properties coupled with their environmental benefits have been the main driver factors for their use as potential alternatives to conventional steel reinforcements.

The purpose of this Materials (https://www.mdpi.com/journal/materials) Special Issue on “Developments in Fiber-Reinforced Cement” is to provide a compendium of the latest advances in order to contribute to the systematization and dissemination of knowledge related to fiber-reinforced cement composites, namely, new recent advances, and developments in this domain. We invite researchers to contribute original research articles as well as review articles that will stimulate the continuing efforts to understand the recent advances and innovation in this research field. Manuscripts combining experimental implementation with theoretical calculations and techno-economic assessment are welcome.

Dr. Antonio C. Azevedo
Dr. João M. P. Q. Delgado
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

  • fiber-reinforced cement
  • high-performance reinforced cement
  • composite processing
  • mechanical properties
  • durability
  • pull-out energy
  • strength
  • surface energy
  • cracking
  • toughness

Published Papers (3 papers)

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Research

16 pages, 5255 KiB  
Article
Test Method for Studying the Shrinkage Effect under Controlled Environmental Conditions for Concrete Reinforced with Coconut Fibres
by Mary Amaguaña, Leidy Guamán, Nicolay Bernardo Yanchapanta Gómez, Majid Khorami, María Calvo and Jorge Albuja-Sánchez
Materials 2023, 16(8), 3247; https://doi.org/10.3390/ma16083247 - 20 Apr 2023
Viewed by 1229
Abstract
This study proposes a novel test method and corresponding procedure to evaluate how coconut fibres affect crack propagation rates resulting from plastic shrinkage during the accelerated drying of concrete slabs. The experiment employed concrete plate specimens, which were used to simulate slab structural [...] Read more.
This study proposes a novel test method and corresponding procedure to evaluate how coconut fibres affect crack propagation rates resulting from plastic shrinkage during the accelerated drying of concrete slabs. The experiment employed concrete plate specimens, which were used to simulate slab structural elements with a surface dimension notably greater than their thickness. These slabs were reinforced with coconut fibre with 0.5%, 0.75%, and 1% fibre content. A wind tunnel was designed to simulate two significant climate parameters (wind speed and air temperature), which could impact the cracking behaviour of surface elements. The proposed wind tunnel allowed air temperature to be controlled alongside wind speed while monitoring moisture loss and the cracking propagation process. During testing, a photographic recording method was used to evaluate cracking behaviour, with the total crack length serving as a parameter to assess the impact of fibre content on the crack propagation of slab surfaces. Additionally, crack depth was measured using ultrasound equipment. The results indicate that the proposed test method was appropriate for future research, allowing for the evaluation of the effect of natural fibres on the plastic shrinkage behaviour of surface elements under controlled environmental conditions. Based on initial studies and the results obtained through the proposed test method, concrete containing 0.75% fibre content exhibited significantly reduced crack propagation on slab surfaces, as well as a reduction in the crack depth caused by plastic shrinkage during the early age of the concrete. Full article
(This article belongs to the Special Issue Developments in Fiber-Reinforced Cement)
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21 pages, 23425 KiB  
Article
Experimental and Numerical Evaluation on the Performance of Perfobond Leiste Shear Connectors in Steel–SFRCC Composite Beams
by Kai Peng, Laijun Liu, Fangwen Wu, Song Lei, Jincheng Cao, Xiangyan Fan and Xuan Wang
Materials 2022, 15(20), 7237; https://doi.org/10.3390/ma15207237 - 17 Oct 2022
Cited by 2 | Viewed by 1056
Abstract
The difference between the shear performances of Perfobond Leiste (PBL) shear connectors embedded in steel fiber-reinforced cementitious composite (SFRCC) structure and normal strength concrete (NC) structure was investigated by push-out tests and finite element (FE) simulations. Push-out tests were carried out on nine [...] Read more.
The difference between the shear performances of Perfobond Leiste (PBL) shear connectors embedded in steel fiber-reinforced cementitious composite (SFRCC) structure and normal strength concrete (NC) structure was investigated by push-out tests and finite element (FE) simulations. Push-out tests were carried out on nine steel-SFRCC specimens and nine steel-NC specimens. The mechanical behavior of the PBL shear connector was examined according to the failure modes, load-slip curves, and strain distribution laws of the push-out specimens. Experimental results revealed that the extension of cracks in SFRCC was hindered by steel fibers, and the number and width of cracks in SFRCC were smaller than those in NC. The failure mode of the steel-SFRCC specimens and the single-hole steel-NC specimens was the shear failure of the penetrating reinforcement, whereas that of the multi-hole NC specimens was concrete slab cracking. The ultimate shear bearing capacity of PBL shear connectors in the steel-SFRCC specimens was 47.8% greater than that in the steel-NC specimens. Furthermore, an FE model verified by the test results was established to conduct parametric analyses. It was found that the hole diameter and thickness of the steel plate and the yield strength of the penetrating rebar greatly affected the shear bearing capacity of PBL shear connectors. Finally, based on the experimental and FE simulation results, an expression for calculating the ultimate shear bearing capacity of PBL shear connectors in the steel-SFRCC composite structure was developed by considering the bearing effects of concrete dowels, penetrating rebars, and end parts. Full article
(This article belongs to the Special Issue Developments in Fiber-Reinforced Cement)
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13 pages, 1466 KiB  
Article
Mortar Bond Strength: A Brief Literature Review, Tests for Analysis, New Research Needs and Initial Experiments
by Janaina Salustio, Sandro M. Torres, Anne C. Melo, Ângelo J. Costa e Silva, António C. Azevedo, Jennef C. Tavares, Matheus S. Leal and João M. P. Q. Delgado
Materials 2022, 15(6), 2332; https://doi.org/10.3390/ma15062332 - 21 Mar 2022
Cited by 11 | Viewed by 2594
Abstract
Despite technological advances in the production processes of the materials for ceramic façade coatings, the problems of detachments are still frequent. Therefore, this work aims to investigate, through a literature review, the existing gaps related to the adhesion ability of adhesive mortars, identifying [...] Read more.
Despite technological advances in the production processes of the materials for ceramic façade coatings, the problems of detachments are still frequent. Therefore, this work aims to investigate, through a literature review, the existing gaps related to the adhesion ability of adhesive mortars, identifying new research needs that can better explain the behavior of the material. In addition, an experimental procedure was developed to evaluate the mechanical capacity of adhesive mortars when subjected to cyclic stresses. Dynamic stress measurements are presented for several blocks of mortar and on similar blocks but with a slot drilled prior to measurements (intended to represent failure). From these data we calculated values of stress energy, elastic energy, and dissipated energy. The experimental results showed that the energy involved in the test process accompanied the load values and current stress values. The mortar samples with the previous failure absorbed and dissipated less energy than mortars without failure, showing that materials that have less energy to dissipate, are materials that have developed less capacity to adhere, that is, to keep their parts together. Full article
(This article belongs to the Special Issue Developments in Fiber-Reinforced Cement)
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