Mechanical Properties of MiniBars™ Basalt Fiber-Reinforced Geopolymer Composites

Materials, Journal Year: 2024, Volume and Issue: 17(1), P. 248 - 248

Published: Jan. 2, 2024

Fly ash-based geopolymers represent a new material, which can be considered an alternative to ordinary Portland cement. MiniBars™ are basalt fiber composites, and they were used reinforce the geopolymer matrix for creation of unidirectional reinforced composites (MiniBars™ FRBCs). New materials obtained by incorporating variable amount (0, 12.5, 25, 50, 75 vol.% MiniBars™) in matrix. Geopolymers prepared mixing fly ash powder with Na2SiO3 NaOH as alkaline activators. FRBCs cured at 70 °C 48 h tested different mechanical properties. Optical microscopy SEM employed investigate fillers FRBC. FRBC showed increasing properties increased addition MiniBars™. The more than wtihout MiniBars™: flexural strength > 11.59–25.97 times, modulus 3.33–5.92 tensile 3.50–8.03 1.12–1.30 force load upper yield 4.18–7.27 times. optical analyses performed on fractured surface section confirmed good network around Based our results, could very promising green material buildings.

Language: Английский

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An Overview of Micro- and Nano-Dispersion Additives for Asphalt and Bitumen for Road Construction

Buildings, Journal Year: 2023, Volume and Issue: 13(12), P. 2948 - 2948

Published: Nov. 26, 2023

The main motivations for the development of research in area appropriate additives asphalt and bitumen are enhancement their properties improvement production process, including reduction environmental burden. Many improve mineral–asphalt mixtures. Traditionally, such as following applied: elastomers, plastomers, latexes, rubber powder, resins, others. Currently, modification materials by traditional can be replaced nanomaterials that better fit requirements modern industry. New solutions required, which has led to years studies researching micro- nano-additives. aim article is analyze contemporary where nano-additives were applied summarize advantages disadvantages implementation these road construction. studied state art this based on literature research. It presents possible materials’ solutions, properties, used technology, featured trends challenges further projects discussed, especially issues.

Language: Английский

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Bonding Properties between Fly Ash/Slag-Based Engineering Geopolymer Composites and Concrete

Materials, Journal Year: 2023, Volume and Issue: 16(12), P. 4232 - 4232

Published: June 7, 2023

Concrete infrastructure repair remains a formidable challenge. The application of engineering geopolymer composites (EGCs) as material in the field rapid structural can ensure safety facilities and prolong their service life. However, interfacial bonding performance existing concrete with EGCs is still unclear. purpose this paper to explore kind EGC good mechanical properties, evaluate using tensile test single shear test. At same time, X-ray diffraction (XRD) Scanning electron microscopy (SEM) were adopted study microstructure. results showed that bond strength increased increase interface roughness. For polyvinyl alcohol (PVA)-fiber-reinforced EGCs, FA content (0-40%). change (20-60%), polyethylene (PE) fiber-reinforced have little change. PVA-fiber-reinforced water-binder ratio (0.30-0.34), while PE-fiber-reinforced decreased. bond-slip model was established based on results. XRD studies when 20-40%, C-S-H gels high reaction sufficient. SEM 20%, PE fiber-matrix weakened certain extent, so ductility improved. Besides, products matrix gradually

Language: Английский

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Industrial and future scenarios of graphene quantum dots derived nanocomposites

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 211 - 226

Published: Jan. 1, 2025

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Production of continuous carbon nanotube/geopolymer composite fibers by wet spinning for adsorption applications

The European Physical Journal Plus, Journal Year: 2025, Volume and Issue: 140(2)

Published: Feb. 8, 2025

Language: Английский

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The Influence of Alkali-Resistant MiniBars™ on the Mechanical Properties of Geopolymer Composites

Materials, Journal Year: 2025, Volume and Issue: 18(4), P. 778 - 778

Published: Feb. 10, 2025

Geopolymer concrete reinforced with MiniBars™ could be an eco-friendly, innovative, durable, high-strength material substitute for common Portland cement in buildings. AR glass fiber composites (AR MiniBars™) (ReforceTech AS, Royken, Norway) 60 mm length were utilized to strengthen the geopolymer matrix fabrication of unidirectional by FRBCs). New FRBCs fabricated adding different amounts (0, 12.5, 25, 50, 75 vol.%) into fly ash paste. Geopolymers obtained combining powder Na2SiO3/NaOH a ratio 2.5:1, which served as alkaline activator. cured 48 h at 70 °C and tested mechanical properties. Fly ash, MiniBars™, FRBC evaluated optical microscopy SEM. The addition increased properties FRBCs. heightened compared without MiniBars™; flexural strength was 18.80-30.71 times greater, modulus 4.07-5.25 tensile 3.49-8.27 force load upper yield 3.6-7.72 compressive cubic samples 2.75-3.61 greater. fractured surfaces sections inspected SEM analyses, even though there no chemical adhesion, we achieved good micromechanical adhesion MiniBars™. These results encouraged us propose application construction.

Language: Английский

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Graphene oxide reinforced bauxite tailings-based geopolymers: mechanical and microstructural properties investigations

Fullerenes Nanotubes and Carbon Nanostructures, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 15

Published: Feb. 20, 2025

In an effort to provide a more sustainable and environmentally friendly alternative, the current study intends address issue of Bauxite Tailings (BT) disposal Graphene Oxide's (GO) efficient use in geopolymer concrete. The compressive strength alkali-activated GO-reinforced mortar with 40% BT 60% Ground Granulated Blast Furnace Slag (GGBS) as its precursors under ambient curing was evaluated different molarities such 4 M, 6 8 10. GO added binder at weight ratios 0.025 wt.%, 0.05 0.075 0.1 0.125 it noticed that wt.% optimum dosage since accelerated geopolymerization process improved dissolution lower molarity resulting 47.5 MPa, which 40.65% higher than specimens without GO. Compared GO, Oxide-reinforced reduced need for NaOH by 50% is significant handling barrier during production geopolymer. effect investigated using XRD, FTIR, SEM characterize mortar, degree dispersion assessed UV-Vis spectrometer. As result denser microstructure fewer unreacted phases, investigation's findings validate synthesis gel. experimental investigations this suggest effective repurposing GGBS where can serve nano-reinforcement enhance mechanical microstructural properties be beneficial.

Language: Английский

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Tailoring Zeolites for Enhanced Post-Combustion CO2 Capture: A Critical Review

Current Research in Green and Sustainable Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 100451 - 100451

Published: March 1, 2025

Language: Английский

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Graphene Quantum Dots in Conjugated and Rubbery Matrices - Stipulations and Physical/Technical Attributes

Advances in Materials Science, Journal Year: 2025, Volume and Issue: 25(1), P. 5 - 36

Published: March 1, 2025

Abstract This leading-edge overview delivers an all-inclusive knowledge on fundamentals, state-of-the-art, and technicalities of two important polymer categories filled with graphene quantum dots, namely conjugated polymer/graphene dots rubber/graphene nanocomposites. According to the literature up till now, facile efficient fabrication methods, like in situ polymerization, solution mixing, melt blending, etc. have been reported for these derived hybrids. The ensuing based nanocomposites were inspected microstructural, electrical conductivity, charge transportation, thermal/mechanical resistance, fluorescence properties, allied valuable physical features. Incidentally, we notice promising applications inimitable hybrids gas/molecular/piezoelectric sensors, supercapacitors, biomedical areas. Nevertheless, due limited reports applied sides conjugated/rubbery matrices, future research attempts seem indispensable resolve challenges optimized/controlled processing also unveil structure-property-performance links synergistic mechanisms developing next generation industrial level

Language: Английский

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An Investigation of Key Mechanical and Physical Characteristics of Geopolymer Composites for Sustainable Road Infrastructure Applications

Buildings, Journal Year: 2025, Volume and Issue: 15(8), P. 1262 - 1262

Published: April 11, 2025

One of the most important areas construction industry is road infrastructure. It plays a crucial role in economy various countries. Today’s roads must withstand long-term temperature and load differences, but some infrastructure cannot survive these tests, after one severe winter, there may be asphalt cracks holes that need to repaired. This problem requires new applications more resistant materials. Geopolymers are potential candidates. class material as building for has frost salt. The aim study herein demonstrate mechanical physical properties composite geopolymer made from fly ash, coal shale, nanosilica, carbon fiber application research experiments will serve determine whether geopolymers suitable replacing traditional concrete processes. following methods were applied: SEM, XRF, XRD, compressive strength testing, abrasion, investigation freeze–thaw resistance climatic chamber. results confirm possibility applying compositions infrastructure, including sufficient such ca. 38 MPa resistance, shown by mass loss about 1.7%, well abrasion 4%.

Language: Английский

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