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Smart and Innovative Building Materials for Civil and Military Applications

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

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 7407

Special Issue Editors


E-Mail Website1 Website2
Guest Editor
1. Fibrenamics, Institute of Innovation on Fiber-Based Materials and Composites, University of Minho, 4710-057 Guimarães, Portugal
2. Centre for Textile Science and Technology (2C2T), University of Minho, 4710-057 Guimarães, Portugal
Interests: fibrous and composite materials; nanofibers; advanced textiles; smart composites
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
1. Department of Civil Engineering, Architecture and Georesources, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2. Civil Engineering Research and Innovation for Sustainability (CERIS), University of Lisbon, 1049-001 Lisbon, Portugal
Interests: new building materials; cement-based materials; low-carbon cements; special concretes; sustainability; service life
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Civil Engineering, School of Engineering, University of Minho, Portugal
Research unit: Institute for Sustainability and Innovation in Structural Engineering (ISISE)
Interests: transportation geotechnics; transportation engineering; sustainability; ground improvement; data mining

Special Issue Information

Dear Colleagues,

The development of dual use solutions, for civil and military applications, is one of the main drivers for research on innovative and smart materials. In fact, with the increase of terrorist and pandemic phenomena over the last few decades, most of the solutions under development are thought to fit the requirements of both areas. Blast protection, CBRN protection, phase change materials, self-cleaning and self-healing materials, shape memory alloys, magneto- and electrorheological materials, piezoelectric materials, and thermochromic and electrocromic materials are just some examples of the topics being covered in this Special Issue. Additionally, it is intended that coverage also be focused on incremental innovations of traditional materials, such as ceramics, glass, timber, concrete, and polymers, aiming at new building materials with improved performance, durability, and sustainability. Nano-reinforced, ultra-lightweight, self-healing, ultrahigh-performance, low-carbon, translucent, and multifunctional cement/asphalt/polymer concrete (able to continually monitor, regulate, adapt, and repair itself) are some major examples of ongoing research on bounded-based materials that are within the scope of this Special Issue.

Prof. Raul Manuel Esteves de Sousa Fangueiro
Prof. José Alexandre de Brito Aleixo Bogas
Prof. António Gomes Correia
Guest Editors

Manuscript Submission Information

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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

  • Building materials
  • Smart materials
  • Innovative materials
  • Sustainability
  • Blasting
  • Nano-reinforced
  • Ultra-lightweight
  • Self-healing
  • Low-carbon
  • Multifunctional materials

Published Papers (3 papers)

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Research

19 pages, 7460 KiB  
Article
Shear Performance of RC Beams Reinforced with Fe-Based Shape Memory Alloy Stirrups
by Sang-Won Ji, Yeong-Mo Yeon and Ki-Nam Hong
Materials 2022, 15(5), 1703; https://doi.org/10.3390/ma15051703 - 24 Feb 2022
Cited by 12 | Viewed by 2020
Abstract
In this study, the shear performance of a reinforced concrete (RC) beam with Fe-based shape memory alloy (Fe-SMA) stirrups was evaluated experimentally and analytically. Five specimens that had a possibility of shear failure under four-point loading were prepared. The major experimental variables were [...] Read more.
In this study, the shear performance of a reinforced concrete (RC) beam with Fe-based shape memory alloy (Fe-SMA) stirrups was evaluated experimentally and analytically. Five specimens that had a possibility of shear failure under four-point loading were prepared. The major experimental variables were the spacings (300 and 200 mm) between the Fe-SMA stirrups and whether the stirrups were activated or non-activated. The shear strength of the specimen reinforced with the Fe-SMA stirrups at a spacing of 200 mm was 27.1% higher than that of the specimen reinforced at a spacing of 300 mm. The activation of the Fe-SMA stirrups, which produced active confining pressure, increased the shear strength by up to 7.6% and decreased the number of shear cracks compared to the case of the non-activated specimen. Therefore, the use of Fe-SMA stirrups could significantly improve the usability of concrete members by increasing their shear strength and initial stiffness and by controlling crack formation. Furthermore, finite element method (FEM) analysis was conducted using LS-DYNA, a commercial software program, to predict the shear performance of the RC beam reinforced with the Fe-SMA stirrups. The ultimate load and displacement of each specimen were predicted with errors less than 1.4 and 9.4%, respectively. Furthermore, the FEM predicted the change in failure mode and the stiffness improvement due to the activation of the Fe-SMA stirrups. Therefore, the proposed finite element analysis model can effectively predict the behavior of an RC beam reinforced with Fe-SMA stirrups. Full article
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25 pages, 8836 KiB  
Article
Influence of the Chloride Attack on the Post-Cracking Behavior of Recycled Steel Fiber Reinforced Concrete
by Cristina Frazão, Joaquim Barros and José Alexandre Bogas
Materials 2021, 14(5), 1279; https://doi.org/10.3390/ma14051279 - 08 Mar 2021
Cited by 3 | Viewed by 1509
Abstract
The main purpose of the present work is to study the mechanical behavior and durability performance of recycled steel fiber reinforced concrete (RSFRC) under a chloride environment. To this end, the effect of chloride attack on the load-carrying capacity of pre-cracked RSFRC round [...] Read more.
The main purpose of the present work is to study the mechanical behavior and durability performance of recycled steel fiber reinforced concrete (RSFRC) under a chloride environment. To this end, the effect of chloride attack on the load-carrying capacity of pre-cracked RSFRC round panels is investigated by performing round panel tests supported on three points (RPT-3ps), considering the influence of the crack width and the fiber distribution/orientation profile. In addition, the influence of the adopted chloride exposure conditions on the post-cracking constitutive laws of the developed RSFRC is also assessed by performing numerical simulations for the prediction of the long-term performance of RSFRC under these aggressive conditions. The tensile stress–crack width relationship of RSFRC is derived by performing an inverse analysis with the RPT-3ps results. The obtained experimental and numerical results show a negligible effect of the chloride attack on the post-cracking behavior of RSFRC for the chloride exposure conditions and pre-crack width levels adopted in this study. Full article
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27 pages, 13889 KiB  
Article
Ultra-Sensitive Affordable Cementitious Composite with High Mechanical and Microstructural Performances by Hybrid CNT/GNP
by Mohammadmahdi Abedi, Raul Fangueiro and António Gomes Correia
Materials 2020, 13(16), 3484; https://doi.org/10.3390/ma13163484 - 07 Aug 2020
Cited by 27 | Viewed by 2726
Abstract
In this paper a hybrid combination of carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) was used for developing cementitious self-sensing composite with high mechanical, microstructural and durability performances. The mixture of these two nanoparticles with different 1D and 2D geometrical shapes can reduce [...] Read more.
In this paper a hybrid combination of carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) was used for developing cementitious self-sensing composite with high mechanical, microstructural and durability performances. The mixture of these two nanoparticles with different 1D and 2D geometrical shapes can reduce the percolation threshold to a certain amount which can avoid agglomeration formation and also reinforce the microstructure due to percolation and electron quantum tunneling amplification. In this route, different concentrations of CNT + GNP were dispersed by Pluronic F-127 and tributyl phosphate (TBP) with 3 h sonication at 40 °C and incorporated into the cementitious mortar. Mechanical, microstructural, and durability of the reinforced mortar were investigated by various tests in different hydration periods (7, 28, and 90 days). Additionally, the piezoresistivity behavior of specimens was also evaluated by the four-probe method under flexural and compression cyclic loading. Results demonstrated that hybrid CNT + GNP can significantly improve mechanical and microstructural properties of cementitious composite by filler function, bridging cracks, and increasing hydration rate mechanisms. CNT + GNP intruded specimens also showed higher resistance against climatic cycle tests. Generally, the trend of all results demonstrates an optimal concentration of CNT (0.25%) + GNP (0.25%). Furthermore, increasing CNT + GNP concentration leads to sharp changes in electrical resistivity of reinforced specimens under small variation of strain achieving high gauge factor in both flexural and compression loading modes. Full article
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