Innovative modeling techniques including MEP, ANN and FQ to forecast the compressive strength of geopolymer concrete modified with nanoparticles

Neural Computing and Applications, Journal Year: 2023, Volume and Issue: 35(17), P. 12453 - 12479

Published: March 1, 2023

Language: Английский

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Investigation of the Physical Mechanical Properties and Durability of Sustainable Ultra-High Performance Concrete with Recycled Waste Glass

Sustainability, Journal Year: 2023, Volume and Issue: 15(4), P. 3085 - 3085

Published: Feb. 8, 2023

Construction material sustainability and waste reuse have emerged as significant environmental issues. Concrete is widely used in the building engineering fields. Ultra-high performance concrete (UHPC), which has remarkably high mechanical properties, become one of most common varieties recent years. As a result, substantial amounts Portland cement (PC) are frequently used, raising initial cost UHPC restricting its broad use structural applications. A amount CO2 produced large natural resources consumed production. To make production more eco-friendly economically viable, it advised that PC preparations be replaced with different additives recycled aggregates from various sources substituted for aggregates. This research aims to develop an environmentally friendly cost-effective by using glass (GW) sizes alternative replacement ratios 0%, 10%, 20%, 30%, 40%, 50% utilizing powder (GP). Fine aggregate “sand (S)” also particles (G) 50%, 100%. accomplish this, 18 mixes, separated into three groups, made examined experimentally. Slump flow, water permeability, microstructural characteristics all studied. According results, increasing S ratio G improved workability. Furthermore, ideal replacing GP achieve properties were 20% respectively. Increasing rate place at fixed resulted decrease permeability values. Finally, analysis confirms experimental findings. In addition, PC100-S100 was best mix compared PC100-S50 G50 PC100-G100.

Language: Английский

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Application of Ultra-High-Performance Concrete in Bridge Engineering: Current Status, Limitations, Challenges, and Future Prospects

Buildings, Journal Year: 2023, Volume and Issue: 13(1), P. 185 - 185

Published: Jan. 10, 2023

Ultra-high-performance concrete (UHPC) is a form of cementitious composite that has been the most innovative product in technology over last three decades. broadly employed for design numerous forms construction owing to its excellent mechanical characteristics and durability, studies on behavior have grown fast While utilization ultra-high-performance bridge engineering (BE) limited high costs, little recognized about UHPC various BE elements. As result these issues, comprehensive review current development trends should be conducted determine present state perspective. This study presents state-of-the-art applications BE. also discusses status, limitations, challenges, areas further investigation The aim this research help stakeholders understand distinctive characteristics, benefits, barriers broad applications. understanding will aid increasing entire market share both national worldwide building sectors.

Language: Английский

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Physicochemical and Microstructural Characterization of Klias Peat, Lumadan POFA, and GGBFS for Geopolymer Based Soil Stabilization

HighTech and Innovation Journal, Journal Year: 2023, Volume and Issue: 4(2), P. 327 - 348

Published: June 1, 2023

Peat soils are highly heterogeneous and considered problematic because they have a high moisture content low shear strength. It requires stabilization to enhance its engineering properties before it is transformed into viable construction material. The use of geopolymers as stabilizer materials for weak has been on the rise recently due their carbon footprint compared conventional like cement. Geopolymerization occurs result alkali activation aluminosilicate materials. In this study, peat soil Palm Oil Fuel Ash (POFA) Ground Granulated Blast Furnace Slag (GGBFS) characterized assess suitability geopolymer precursor A series laboratory studies were carried out determine physicochemical materials, such particle size distribution, organic content, specific gravity, pH, electrical conductivity. Furthermore, XRD, XRF, FESEM tests ascertain mineral characteristics, elemental chemical composition, morphological characteristics these respectively. classified hemic with sufficient (Si/Al ratio 2.11). POFA identified Class F pozzolan adequate Si+Al+Fe oxide (67.9%), stipulated by ASTM C618. GGBFS material was found be appropriate production, Si/Al 2.17, hydration modulus 2.38 (good hydration), basicity coefficient 1.32 (alkaline favorable geopolymerization). Based assessment criteria, all assessed deemed suitable geopolymerization, effectiveness POFA-GGBFS improve should studied in depth. At present, there limited pertaining alkali-activated blends properties. As characterization phase, planned works involving compressive strength testing program POFA-GGBFS-peat at ambient temperature will near future. eventual aim research remediate repurposed road subgrade Doi: 10.28991/HIJ-2023-04-02-07 Full Text: PDF

Language: Английский

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Integrating Circular Economy Principles into Concrete Technology: Enhancing Sustainability Through Industrial Waste Utilization

Results in Engineering, Journal Year: 2024, Volume and Issue: 24, P. 102846 - 102846

Published: Sept. 6, 2024

Language: Английский

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Clean production of geopolymers as an opportunity for sustainable development of the construction industry

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 928, P. 172579 - 172579

Published: April 17, 2024

Language: Английский

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Multiscale microstructure and micromechanical properties of alkali-activated concrete: A critical review

Cement and Concrete Composites, Journal Year: 2024, Volume and Issue: 152, P. 105664 - 105664

Published: July 11, 2024

Language: Английский

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Mechanism analysis on tensile fracture properties of heterogeneous BFLAC at cryogenic temperature: Experimental investigation and mesoscale simulation

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 438, P. 137206 - 137206

Published: July 1, 2024

Language: Английский

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Metaheuristic optimization of machine learning models for strength prediction of high-performance self-compacting alkali-activated slag concrete

Multiscale and Multidisciplinary Modeling Experiments and Design, Journal Year: 2024, Volume and Issue: 7(3), P. 2901 - 2928

Published: March 4, 2024

Language: Английский

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Thermal, Mechanical, and Microstructural Properties of Novel Light Expanded Clay Aggregate (LECA)-Based Geopolymer Concretes

Journal of Composites Science, Journal Year: 2025, Volume and Issue: 9(2), P. 69 - 69

Published: Feb. 4, 2025

The construction sector’s reliance on traditional cement significantly contributes to CO2 emissions, underscoring the urgent need for sustainable alternatives. This study investigates fine (0–4 mm), rounded, uncoated, porous-surfaced lightweight expanded clay aggregate (LECA)-based geopolymers, which combine low-carbon benefits of geopolymers with LECA’s and insulating properties. Geopolymers were synthesized using lignite-rich fly ash varying ratios LECA aggregate. Mechanical testing revealed that reference mixture without (REF-GEO) achieved highest compressive strength 37.89 ± 0.75 MPa flexural 7.62 0.11 MPa, while complete substitution (LECA-100%) reduced 17.31 0.88 3.41 MPa. density samples decreased from 2.06 g/cm3 REF-GEO 1.31 LECA-100%, thermal conductivity dropped 1.15 0.07 W/mK 0.38 0.01 W/mK. Microstructural analysis XRD SEM-EDX highlighted changes in material’s internal structure increase porosity higher content. Water vapor permeability increases over time, particularly These findings suggest LECA-based are suitable low-load or non-structural elements. They ideal sustainable, energy-efficient requires lightweight, insulating, breathable materials.

Language: Английский

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