Microstructure and mechanical properties of engineered cementitious composites (ECC) with recycling extracted titanium tailing slag (ETTS)

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 98, P. 111282 - 111282

Published: Nov. 7, 2024

Language: Английский

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In-situ Tensile Behavior of Hybrid PE/PP Fibers Reinforced Strain-Hardening Alkali-activated Composites (H-SHAAC) Subjected to different temperatures

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 98, P. 111332 - 111332

Published: Nov. 14, 2024

Language: Английский

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Assessment on eco-solidified alkali residue reinforced soft soils for intelligent subgrade constructions

Transportation Geotechnics, Journal Year: 2025, Volume and Issue: unknown, P. 101516 - 101516

Published: Feb. 1, 2025

Language: Английский

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Novel chloride binding-based quantitative method for estimating the degree of geopolymerization in metakaolin geopolymer

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 470, P. 140528 - 140528

Published: Feb. 28, 2025

Language: Английский

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Mechanical Properties of Sustainable Engineered Geopolymer Composites with Sodium Carbonate Activators

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112486 - 112486

Published: March 1, 2025

Language: Английский

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Design approach for flexural properties of engineered geopolymer composite shield tunnel segments reinforced with GFRP bars

Tunnelling and Underground Space Technology, Journal Year: 2025, Volume and Issue: 162, P. 106639 - 106639

Published: April 10, 2025

Language: Английский

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Study on the Influence and Mechanism of Steel, Polyvinyl Alcohol, and Polyethylene Fibers on Slag–Yellow River Sediment Geopolymers

Polymers, Journal Year: 2025, Volume and Issue: 17(8), P. 1072 - 1072

Published: April 16, 2025

Steel fibers (STs), polyvinyl alcohol (PVAs), and polyethylene (PEs) were selected to systematically investigate the effects of different fiber types dosages on workability (slump spread) mechanical properties (compressive strength splitting tensile strength) slag–Yellow River sand geopolymer eco-cementitious materials. By combining microstructural testing techniques such as thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), influence mechanisms characteristic products microstructure matrix thoroughly revealed, role in development Yellow sediment-based geopolymers was elucidated. The results show that content increases, mixture significantly decreases. appropriate incorporation steel PVAs can enhance toughness matrix. When dosage is 1%, 28-day compressive specimens with increased by 25.93% 21.96%, respectively, compared control group, while 50.00% 60.34%, respectively. However, action differ significantly; primarily performance through their high stiffness strength, whereas inhibit crack propagation flexibility excellent bonding properties. In contrast, improvement PEs mainly reflected toughening. 1.5%, PE 72.61%, tensile-to-compressive ratio 92.32% group. Microstructural indicates does not alter alkali-activated cementitious materials, but excessive affects generation gel-like distribution free water, thereby altering decomposition behavior gel products. Additionally, incorporating forms a honeycomb-like amorphous gel, resulting weak interfacial between This one main reasons for limited reinforcing effect at microscopic scale key factor inferior long-term PVAs. study provides theoretical foundations practical guidance optimizing fiber-reinforced

Language: Английский

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Study on the Effects and Mechanisms of Fly Ash, Silica Fume, and Metakaolin on the Properties of Slag–Yellow River Sediment-Based Geopolymers

Materials, Journal Year: 2025, Volume and Issue: 18(8), P. 1845 - 1845

Published: April 17, 2025

The incorporation of mineral admixtures plays a crucial role in enhancing the performance and sustainability geopolymer systems. This study evaluates influence fly ash (FA), silica fume (SF), metakaolin (MK) as typical on slag–Yellow River sediment eco-cementitious materials. impact varying replacement ratios these for slag setting time, workability, reaction kinetics, strength development were thoroughly investigated. To understand underlying mechanisms, microstructural analysis was conducted using thermogravimetric–differential thermal (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy–energy dispersive spectroscopy (SEM-EDS), mercury intrusion porosimetry (MIP). results indicate that FA, SF, delayed initial reaction, prolonged induction period, reduced acceleration rate. These effects hindered early development. At 30% FA content, matrix exhibited excellent flowability sustained heat release. 28-day splitting tensile increased by 42.40%, while compressive decreased 2.85%. In contrast, 20% SF significantly improved strength, increasing strengths 11.19% 6.16%, respectively. 15% metakaolin, improvement intermediate, with 3.55% 10.59%, However, dosages exceeding workability. did not interfere slag’s alkali-activation reaction. newly formed N-A-S-H C-S-H gels integrated original C-A-S-H gels, optimizing pore structure reducing pores larger than 1 µm, compactness reinforcement. provides practical guidance use sustainable

Language: Английский

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High-temperature resistance of engineered geopolymer composite: Isolating the effects of key components

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 481, P. 141664 - 141664

Published: May 6, 2025

Language: Английский

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Study on Cl- solidification characteristics and enhancement principle of alkali excited materials modified with high-performance strong base anion exchange resin

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 442, P. 137314 - 137314

Published: July 26, 2024

Language: Английский

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