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Structural and Functional Performance of Geopolymer Materials

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 October 2023) | Viewed by 1241

Special Issue Editors

Department of Architecture and Industrial Design, University of Campania “Luigi Vanvitelli”, Caserta, Italy
Interests: geopolymers; polymers; functional materials; sustainable materials; life cycle assessment (LCA); additive manufacturing; mechanical properties; chemical–physical characterizations
Department of Engineering, University of Study of Naples “Parthenope”, Naples, Italy
Interests: green chemistry; innovative materials
Department of Engineering and Geology, University of Chieti-Pescara “G d’Annunzio”, 66100 Pescara, Italy
Interests: materials science; geopolymers; construction and building materials; waste recycling; porous and foamy inorganic materials; hybrid foams; sustainable and innovative building materials; thermal-acoustic insulating materials; chemical-physical, microstructural, and mechanical characterization of materials
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Special Issue Information

Dear Colleagues,

Geopolymers are amorphous ceramic materials obtained from the alkaline activation of aluminosilicates including those from wastes, such as mining waste, coal fly, and bottom ash, granulated blast furnace slag, water purification sludge, and so on.

In terms of applications as cement and concrete materials, they can reduce energy consumption during production, emission of greenhouse gases, and environmental impacts. These characteristics, combined with high early-age strength and fast hardness characteristics, allow considering these materials as a promising “green” alternative to ordinary Portland cement-based materials.

Geopolymer concrete can find application in building, construction, repair, restoring, marine construction, pavement base materials, 3D printing, fire-resistant and high-temperature materials, thermal and acoustic insulation. Moreover, they can be used in the construction industry to produce precast materials or in the coating of cement structures for the rehabilitation of compromised structures, flame inertization, and improvement of resistance to acids and water. Special applications include the immobilization of heavy metal pollution, pH regulator materials, catalysts, conductive materials for moisture sensor applications, and thermal storage.

Functional applications, such as fire prevention, isolation, heat preservation, and adsorption of harmful ions, can be used for buildings in special fields, such as fire prevention buildings, insulation walls, biomaterials, and, nuclear power plants can be considered. 

Dr. Laura Ricciotti
Dr. Alessio Occhicone
Dr. Ilaria Capasso
Guest Editors

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Published Papers (2 papers)

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Research

21 pages, 7930 KiB  
Article
Study on Vertical Bearing Capacity of Pile Foundation with Distributed Geopolymer Post-Grouting on Pile Side
by Pan Li, Yangyang Xia, Xinhui Xie, Jing Wang, Chaojie Wang, Mingsheng Shi, Bo Wang and Haoye Wu
Materials 2024, 17(2), 398; https://doi.org/10.3390/ma17020398 - 12 Jan 2024
Viewed by 435
Abstract
To study the applicability of the new geopolymer grouting material for super-long and large-diameter post-grouting bored piles in silty fine sand geology, this paper compares the bearing capacity of two grouting materials, geopolymer and normal Portland cement, and different grouting volume pile side-distributed [...] Read more.
To study the applicability of the new geopolymer grouting material for super-long and large-diameter post-grouting bored piles in silty fine sand geology, this paper compares the bearing capacity of two grouting materials, geopolymer and normal Portland cement, and different grouting volume pile side-distributed grouting piles in silty fine sand based on field model tests are analyzed through the diffusion forms of the two materials in silty fine sand through the morphology of the grouted body after excavation. The results show that the ultimate bearing capacities of P0 (ungrouted pile), P1 (8 kg cement grouted pile), P2 (6 kg geopolymer-grouted pile), P3 (8 kg geopolymer-grouted pile) and P4 (10 kg geopolymer-grouted pile) are 5400 N, 8820 N, 9450 N, 11,700 N and 12,600 N, respectively, and that the ultimate bearing capacity of the grouted pile is improved compared with that of the ungrouted pile since, under the same grouting amount, the maximum bearing capacity of the pile using geopolymer grouting is increased by 133% compared with that of the pile with cement grouting. This further verifies the applicability of the geopolymer grouting material for the post-grouting of the pile foundation in silty fine sand. Under the action of the ultimate load, the pile side friction resistance of P1, P2, P3 and P4 is increased by 200%, 218%, 284% and 319% compared with that of P0. In addition, the excavation results show that the geopolymer post-grouting pile forms the ellipsoidal consolidation body at the pile side grouting location, which mainly comprises extrusion diffusion with a small amount of infiltration diffusion, and the cement grouting pile forms a sheet-like consolidation body at the lower grouting location, which primarily comprises split diffusion. This study can provide a reference basis for the theoretical and engineering application of post-grouting piles using geopolymers. Full article
(This article belongs to the Special Issue Structural and Functional Performance of Geopolymer Materials)
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15 pages, 6102 KiB  
Article
Valorisation of Tuff and Brick Wastes by Alkali Activation for Historical Building Remediation
by Ilaria Capasso, Gigliola D’Angelo, Marina Fumo, Mercedes del Rio Merino, Domenico Caputo and Barbara Liguori
Materials 2023, 16(20), 6619; https://doi.org/10.3390/ma16206619 - 10 Oct 2023
Viewed by 538
Abstract
Nowadays, the preservation and restoration of a historical building needs to be faced in accordance with a novel sensibility regarding the environment in order to preserve the building for future generations. In this context, the scientific community is focusing on novel and sustainable [...] Read more.
Nowadays, the preservation and restoration of a historical building needs to be faced in accordance with a novel sensibility regarding the environment in order to preserve the building for future generations. In this context, the scientific community is focusing on novel and sustainable materials and techniques that allow for durability and mechanical performance as well as compatibility with the existing heritage. Alkali-activated materials represent a great challenge to the production of new materials, starting from the existing ones, with the goal of reducing consumption, emission of greenhouse gases and environmental impact. This study deals with the valorisation of waste materials coming from demolition and construction activities in the manufacture of geocomposites suitable for the restoration and conservation of historical heritage. In particular, waste from tuff sawing and brick grinding were used as raw materials, and then the geopolymeric samples produced were characterized based on a physical-chemical and mechanical point of view in order to investigate their performance and evaluate their suitability as materials for a historical building’s recovery. The results showed that brick waste-based geocomposites were more compact than the tuff-based ones, as shown by the higher-density values and the lower values of open porosity and water absorption and as further confirmed by the trend of the mechanical performance. Moreover, experimental data showed that the physical and mechanical properties of both bricks and tuff waste-based geocomposites, even with different waste content, are compatible with existing building materials as well as traditional repairing products. Full article
(This article belongs to the Special Issue Structural and Functional Performance of Geopolymer Materials)
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