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Article
Chemistry, Physical
Alexey N. Beskopylny et al.
Summary: The partial replacement of mineral components of concrete with natural renewable analogues helps make the production process more environmentally friendly and inexpensive. This study focuses on the use of walnut shells as a natural analogue to partially replace coarse aggregates and analyze its effects on the characteristics of concrete. Results show that a dosage of 5% walnut shells leads to an increase in strength characteristics and the maximum ratio of strength to density. Effective partial replacement of coarse aggregate with walnut shells can reduce the consumption of crushed stone by up to 10% and decrease the mass of concrete by up to 6%.
Article
Chemistry, Physical
Weiwei Han et al.
Summary: The pH values of pore solutions in geopolymers were determined using different Al/Na and Si/Na molar ratios. It was found that the pH values decreased with an increase in the Al/Na ratio and increased with an increase in the Si/Na ratio. The compressive strength of the geopolymers showed a similar trend, while the exothermic rates indicated that the reaction levels first increased and then decreased with an increase in the Al/Na ratio, and gradually slowed down with an increase in the Si/Na ratio. SEM, MIP, XRD, and other test methods also confirmed the correlation between the pH values of the pore solutions and the reaction levels.
Article
Polymer Science
Ithan Jessemar R. Dollente et al.
Summary: Research on sustainable construction materials for retrofitting and strengthening historic structures is increasing, and geopolymer technology is considered a favorable alternative to traditional concrete. Fiber reinforcement using this novel cementitious material offers a low carbon footprint and compatibility with local materials. This study aimed to develop fly ash-based geopolymers reinforced with different fibers, and found that polyvinyl alcohol and copper-coated stainless-steel fibers showed high mechanical properties and fracture toughness. However, polypropylene fibers performed poorly. Polyvinyl alcohol and stainless-steel fibers are recommended as viable options for fiber reinforcement in historical structures, but further optimization and testing are necessary.
Article
Polymer Science
Mohammad Rizwan Bhina et al.
Summary: Preheating the sand at 110°C improved the compressive strength of high-performance geopolymer materials (GPM). The Na2SiO3 (sodium silicate) and NaOH (sodium hydroxide) solution synthesized C-S-H and amorphous gel, enhancing the compressive strength of GPM. However, increasing the quantity of ground granulated blast furnace slag (GGBS) significantly reduced the thermal resistance of GPM.
Article
Chemistry, Multidisciplinary
Xiaoming Liu et al.
Summary: The effects of slag content, alkali equivalent and modulus on the durability properties of recycled brick and concrete fine powder-slag-based geopolymer (RPSG) were evaluated. Slag significantly reduced the drying shrinkage and efflorescence of RPSG. The drying shrinkage of RPSG increased with increasing alkali equivalent and modulus, while the degree of efflorescence decreased with increasing modulus. RP-S45-M1.3N6 was identified as the best proportional design for RPSG with excellent durability.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Ceramics
Aref A. Abadel et al.
Summary: The use of industrial and agriculture waste materials to produce green and sustainable mortar has been widely investigated and assessed. In this study, the abrasion and freezing-thawing resistance of geopolymer mortars containing high content of tile ceramic wastes (TCWs) were evaluated using experimental and mathematical methods. The inclusion of TCWs at a large percentage (50%, 60%, and 70%) in the mortar exhibited minimal environmental impact and resulted in compressive strength above 35 MPa by day 28. The models used in the study demonstrated high accuracy in predicting the durability properties of the mortars. Substituting TCWs and FA for GBFS also helped reduce landfill problems and achieve sustainability goals.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Composites
Ghasan Fahim Huseien et al.
Summary: There is a growing need for sustainable concrete in the building industry, with low carbon dioxide emissions and exceptional performance. Industrial byproducts and ecologically safe wastes show promise as ingredients for this type of concrete. Incorporating tile ceramic wastes (TCWs) into the cement binder improves the material's sustainability.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Construction & Building Technology
Jeonghyun Kim et al.
Summary: Clay brick and granite waste can be used as recycled materials for cement mortar, and different forms of these materials have different effects on the properties of the mortar. Using recycled brick and granite as aggregate improves the strength development, while using them as powder helps mitigate drying shrinkage of the mortar.
Review
Polymer Science
Hengels Castillo et al.
Summary: Geopolymers are emerging as an ecological alternative in construction materials, consisting of aluminosilicate sources mixed with an alkaline solution to produce a gel called N-A-S-H that controls their main properties. They offer good compression resistance, along with resistance to high temperatures and corrosive environments, showing potential as a substitute for traditional technologies like concrete, but further research is needed to determine their feasibility on an industrial scale.
Article
Chemistry, Physical
Alessio Occhicone et al.
Summary: The study investigates the use of red mud as a precursor for alkali-activated materials. By combining blast-furnace slag and inert construction sands, mortar samples with low environmental impact are produced. These samples show promising compressive strength values and can serve as alternatives to cement and ceramic materials in the construction industry.
Article
Chemistry, Multidisciplinary
Evgenii M. Shcherban' et al.
Summary: The relationship between the structure and properties of geopolymers in aggressive environments was studied, and the effectiveness of the developed composition and technological solutions was confirmed. Geopolymer concretes showed better performance than cement-based concretes in terms of strength loss and weight loss. Furthermore, raising the heat treatment temperature to 80 degrees Celsius increased the compressive strength of geopolymer binders.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Alexey N. Beskopylny et al.
Summary: This study reveals the influence of component composition and recipe dosage on the characteristics of fine-grained geopolymer concrete with stone flour, and finds that the addition of stone waste significantly improves the compressive strength of geopolymers.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Salim Barbhuiya et al.
Summary: This study examines the strength and microstructure of geopolymer based on fly ash and a combination of metakaolin and fly ash, exploring ways to limit or eliminate the usage of Portland cement in concrete.
Article
Chemistry, Physical
Sergey A. Stel'makh et al.
Summary: This study reviews, investigates and tests the possibility of using various industrial types as nano-modifiers in self-compacting concrete. The results show that nano-modification can improve the performance of concrete materials, including mobility, fluidity, strength, and water resistance.
Article
Polymer Science
Giovanni Dal Poggetto et al.
Summary: Recycling waste corundum abrasive powder in metakaolin-based geopolymer formulations can reduce waste amount and environmental damage, as well as lower transportation costs. The addition of waste corundum does not disturb the geopolymerization process and results in a stable and safe final product with improved ionic conductivity.
Article
Chemistry, Multidisciplinary
Alexey N. Beskopylny et al.
Summary: The use of waste products and recyclable materials to develop new technologies and improve existing ones is a current trend in the construction industry. This study investigates the influence of biochar additive on the microstructure and properties of concrete and proposes a composition with improved characteristics through nanomodification of rice straw recycled biochar. The findings show that adding 6% of rice straw biochar by weight of cement is the most effective dosage, resulting in increased physical and mechanical characteristics of concrete and reduced cement consumption by up to 10%.
APPLIED SCIENCES-BASEL
(2022)
Article
Polymer Science
Laura Ricciotti et al.
Summary: The recent introduction of Next Generation EU packages and the Italian Ecological Transition Plan has stimulated research on environmentally friendly materials in the art and design industry. A sustainable adhesive material, composed of a geopolymer-based composite with polyvinyl acetate, has been developed and characterized. The material exhibits improved properties compared to traditional materials, making it suitable for restoration, monuments, and architectural interventions.
Review
Polymer Science
Kaffayatullah Khan et al.
Summary: This study conducted a scientometric-based assessment of the literature on geopolymers to determine its critical aspects. The findings can help academics establish collaborations and exchange innovative ideas and approaches. Additionally, the study discussed the limitations and potential solutions for the use of geopolymers in the construction sector.
Article
Engineering, Chemical
Bowen Feng et al.
Summary: Energy saving and green sustainability are influencing the development of the construction industry. Research shows that incorporating suitable amounts of metakaolin and activator significantly improves the durability and bond strength of metakaolin geopolymer cement specimens.
Article
Polymer Science
Alexey N. Beskopylny et al.
Summary: This article investigates the fundamental knowledge of cement gel formation for new generation concretes, with a focus on the differences in structure between standard vibrated concrete and centrifugally compacted concrete. The study explores the impact of different compaction techniques, such as vibration and centrifugation, on the gel formation process. Through experimental and theoretical analysis, the researchers describe the main physical and chemical processes involved in gel formation and establish the significant influence of technology on this process. The results show that centrifuged and vibrocentrifuged samples demonstrate improved indicators compared to vibrated ones, particularly in terms of strength and rheological characteristics.
Article
Polymer Science
Alexey N. Beskopylny et al.
Summary: Nano-modified concrete is a science-intensive and developing area characterized by high-strength, high density, and improved structure. This study aims to obtain new theoretical knowledge and experimental-applied dependencies related to the composition-microstructure-properties ratio of high-strength concretes with a nano-modifying additive. Laser granulometry and electron microscopy are used as methods. The most rational mode of nano-modification for high-strength concretes is grinding microsilica into nanosilica within 12 hours. A complex nano-modifier containing nanosilica, superplasticizer, hyperplasticizer, and sodium sulfate was developed. The most effective combination of factors includes 4% nanosilica content, 1.4% superplasticizer additive content, 3% hyperplasticizer additive content, and a water-cement ratio of 0.33. The strength characteristics differ by 45% to 57% compared to other combinations.
Article
Green & Sustainable Science & Technology
Thiago Henrique Silva et al.
Summary: This study investigated the feasibility of replacing feldspathic flux with ceramic sludge waste in the sanitary ware production. The results showed that ceramic sludge could be a better flux and a proportion with total replacement exhibited promising results. Additionally, the water absorption of the sanitary ware decreased with increasing ceramic sludge content. Therefore, the utilization of ceramic sludge waste in the industry is recommended for waste recycling and achieving cleaner production in the sanitary ware industry.
CLEANER ENGINEERING AND TECHNOLOGY
(2022)
Article
Polymer Science
Rayed Alyousef et al.
Summary: Geopolymer mortars (GPMs) as concrete repairing materials, with their eco-friendly properties and excellent mechanical performance, are explored in this study. A new ternary blend of GPMs is proposed, composed of waste ceramic tiles, fly ash, and ground blast furnace slag. The GPMs show enhanced bond strength, mechanical characteristics, and durability performance when exposed to aggressive environments.
Review
Green & Sustainable Science & Technology
Numanuddin M. Azad et al.
Summary: In recent years, there has been a movement towards using industrial waste to produce geopolymer cement/concrete in order to reduce CO2 emissions. A literature review has shown that these geopolymer materials have demonstrated good mechanical properties and environmental benefits.
Article
Green & Sustainable Science & Technology
Alexey N. Beskopylny et al.
Summary: The study aimed to obtain geopolymer fine-grained concrete with improved quality characteristics, with the most effective activator composition found to be NaOH and Na2SiO3. Polynomial equations were obtained showing the dependence of the change in strength characteristics of geopolymer concrete, with a significant effect of the alkaline activator composition noted on the strength characteristics.
Article
Green & Sustainable Science & Technology
Alessio Occhicone et al.
Summary: The aluminum Bayer production process is widely used. By mixing red mud and blast furnace slag, alkali-activated materials with high compressive strength can be obtained. These mixtures have minimal environmental impact and can be used as alternative materials in the construction industry.
Review
Green & Sustainable Science & Technology
Jihui Zhao et al.
Summary: Geopolymer is an environmentally friendly material that can replace traditional cement by utilizing industrial wastes, but there are still some performance shortcomings that need to be improved. Recent research shows that the properties of geopolymer materials can be significantly enhanced by methods such as additives.
JOURNAL OF CLEANER PRODUCTION
(2021)
Retraction
Construction & Building Technology
Fernando Pacheco-Torgal et al.
MATERIALS AND STRUCTURES
(2021)
Review
Chemistry, Physical
Ismail Luhar et al.
Summary: Geopolymer composites, novel inorganic alumino-silicate materials, have emerged as an eco-friendly alternative to Portland cement, showing superior physical and chemical properties with a diverse range of potential applications. By incorporating waste materials as binders, geopolymer technology requires less energy and has lower carbon footprints compared to OPC-based materials. The potential of using ceramic waste in geopolymer composites improves the performance and durability of concrete.
Article
Chemistry, Physical
Kinga Korniejenko et al.
Summary: The aim of this article is to analyze the influence of short coir, glass and carbon fiber admixture on the mechanical properties of fly ash-based geopolymer. The results show that adding fibers can significantly increase compressive strength and have varying degrees of impact on flexural strength.
Article
Materials Science, Ceramics
Juan Pablo Gevaudan et al.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Construction & Building Technology
Giovanny A. Ramos et al.
JOURNAL OF BUILDING ENGINEERING
(2020)
Article
Biochemistry & Molecular Biology
Renata F. Botti et al.
Article
Construction & Building Technology
Sara Moutinho et al.
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Chemistry, Physical
Giuseppina Roviello et al.
Article
Construction & Building Technology
Ali A. Aliabdo et al.
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Ghasan Fahim Huseien et al.
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Urban Studies
Esra Eken et al.
Article
Environmental Sciences
Laura Ricciotti et al.
Article
Materials Science, Ceramics
J. L. Provis
ADVANCES IN APPLIED CERAMICS
(2014)
Article
Environmental Sciences
Izabela Ozga et al.
SCIENCE OF THE TOTAL ENVIRONMENT
(2014)
Proceedings Paper
Engineering, Mechanical
Kozhukhova Natalia Ivanovna et al.
APPLIED MECHANICS, MATERIALS AND MANUFACTURING IV
(2014)
Article
Construction & Building Technology
Alaa M. Rashad
CONSTRUCTION AND BUILDING MATERIALS
(2013)
Article
Materials Science, Multidisciplinary
Tomas Hanzlicek et al.
MATERIALS & DESIGN
(2009)
