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Advanced Engineering Cementitious Composites and Concrete Sustainability, Volume II

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 November 2023) | Viewed by 2478

Special Issue Editor


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Guest Editor
Department of Technologies and Equipment for Materials Processing, Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Iasi, Romania
Interests: engineering cementitious composites; concrete; geopolymers; concrete sustainability; concrete durability; alkali activated materials; materials science; materials chemistry; concrete material technology
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Special Issue Information

Dear Colleagues,

One of the most used building materials today, concrete, is the base of modern constructions around the world; it is used for the construction of foundations, pavements, building walls, architectural structures, roads, bridges, overpasses, etc. Due to its versatility, it can be stated that almost all buildings include concrete in one form or another. However, the diversified nature of the components, their combination, and dosage has led to a very wide range of types of concrete with different characteristics. Therefore, concrete is a material in continuous development that is of high interest even today.

Currently, to reduce or eliminate the limitations of this material, which are related to its brittleness and negative impact on the environment, alternative methods of its manufacture have been sought. Therefore, the development of engineering cementitious composites has led to a significant reduction in flexibility issues, while the introduction of new additives or the optimization of the manufacturing process have led to a significant decrease in the negative effects of the exploitation of virgin raw materials. However, in-depth studies are still needed to optimize and improve the sustainability of these advanced engineering cementitious composites or alternative concrete.

Further to the success of the Special Issue of Materials on “Advanced Engineering Cementitious Composites and Concrete Sustainability”, we are delighted to open a new Special Issue entitled “Advanced Engineering Cementitious Composites and Concrete Sustainability, Volume II”.

The main objectives of this second volume include modeling and obtaining new advanced cementitious materials or alternative concrete.

Areas of interest include, but are not limited to:

  • Advanced engineering cementitious composites;
  • Modeling and simulation of concrete;
  • Characterization of sustainable cementitious materials;
  • Sustainable concrete and alternative cementitious binders;
  • Additive manufacturing of concrete;
  • Sustainability and environmental impact assessment of concrete materials;
  • Geopolymer obtaining and characterization;
  • Alkali-activated materials.

Dr. Dumitru Doru Burduhos Nergis
Guest Editor

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Keywords

  • cement
  • alternative cementitious materials
  • geopolymers
  • sustainable development
  • self-healing materials
  • construction materials
  • durability
  • eco-efficient concrete
  • life cycle analysis
  • functional properties

Published Papers (2 papers)

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Research

20 pages, 8299 KiB  
Article
Incorporating Industrial By-Products into Geopolymer Mortar: Effects on Strength and Durability
by Tang Van Lam and May Huu Nguyen
Materials 2023, 16(12), 4406; https://doi.org/10.3390/ma16124406 - 15 Jun 2023
Cited by 2 | Viewed by 1257
Abstract
In recent years, the reuse of industrial waste has become increasingly important for sustainable development. Therefore, this study investigated the application of granulated blast furnace slag (GBFS) as a cementitious replacement material in fly-ash-based geopolymer mortar containing silica fume (GMS). The performance changes [...] Read more.
In recent years, the reuse of industrial waste has become increasingly important for sustainable development. Therefore, this study investigated the application of granulated blast furnace slag (GBFS) as a cementitious replacement material in fly-ash-based geopolymer mortar containing silica fume (GMS). The performance changes in the GMS samples manufactured with different GBFS ratios (0–50 wt%) and alkaline activators were evaluated. The results indicated that GBFS replacement from 0 wt% to 50 wt% significantly affects GMS performance, including improving the bulk density from 2235 kg/m3 to 2324 kg/m3, flexural-compressive strength from 5.83 MPa to 7.29 MPa and 63.5 MPa to 80.2 MPa, respectively; a decrease in water absorption and chloride penetration, and an improvement in the corrosion resistance of GMS samples. The GMS mixture containing 50 wt% GBFS demonstrated the best performances with notable results regarding strength and durability. Owing to the increased production of C-S-H gel, the microstructure of the GMS sample containing more GBFS was denser, as obtained via the scanning electron micrograph analysis results. Incorporating the three industrial by-products into geopolymer mortars was verified when all samples were determined to be in accordance with the relevant Vietnamese standards. The results demonstrate a promising method to manufacture geopolymer mortars that aid sustainable development. Full article
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17 pages, 5504 KiB  
Article
Assessing the Rheological, Mechanical, and Photocatalytic Properties of Niobium Oxide-Incorporated White Cement Pastes
by Laura Silvestro, Caroline Maroli, Brenda Koch, Artur Spat Ruviaro, Geannina Lima, Mariane Kempka, Camila Fabiano de Freitas Marin, Daniela Zambelli Mezalira and Philippe Jean Paul Gleize
Materials 2023, 16(11), 4090; https://doi.org/10.3390/ma16114090 - 31 May 2023
Viewed by 851
Abstract
Niobium oxide (Nb2O5) is a semiconductor that exhibits photocatalytic properties, making it potentially valuable in addressing air pollution, self-cleaning, and self-disinfection in cement-based materials (CBMs). Therefore, this study aimed to evaluate the impact of different Nb2O5 [...] Read more.
Niobium oxide (Nb2O5) is a semiconductor that exhibits photocatalytic properties, making it potentially valuable in addressing air pollution, self-cleaning, and self-disinfection in cement-based materials (CBMs). Therefore, this study aimed to evaluate the impact of different Nb2O5 concentrations on various parameters, including rheological characteristics, hydration kinetics (measured using isothermal calorimetry), compressive strength, and photocatalytic activity, specifically in the degradation of Rhodamine B (RhB) in white Portland cement pastes. The incorporation of Nb2O5 increased the yield stress and viscosity of the pastes by up to 88.9% and 33.5%, respectively, primarily due to the larger specific surface area (SSA) provided by Nb2O5. However, this addition did not significantly affect the hydration kinetics or the compressive strength of the cement pastes after 3 and 28 days. Tests focusing on the degradation of RhB in the cement pastes revealed that the inclusion of 2.0 wt.% of Nb2O5 was insufficient to degrade the dye when exposed to 393 nm UV light. However, an interesting observation was made concerning RhB in the presence of CBMs, as it demonstrated a degradation mechanism that was not dependent on light. This phenomenon was attributed to the production of superoxide anion radicals resulting from the interaction between the alkaline medium and hydrogen peroxide. Full article
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