Experimental study on dynamic characterisation of ultra-high performance concrete (UHPC) after cryogenic freeze-thaw cycles

Cement and Concrete Composites, Год журнала: 2025, Номер unknown, С. 106011 - 106011

Опубликована: Март 1, 2025

Язык: Английский

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Pore structures and deterioration mechanism of concrete after cryogenic freeze-thaw cycles: Effects of moisture contents and aggregates

Journal of Building Engineering, Год журнала: 2024, Номер 96, С. 110620 - 110620

Опубликована: Авг. 31, 2024

Язык: Английский

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Effect of steel-polypropylene hybrid fiber on the flexural behavior of RC beams under cryogenic freeze–thaw cycles and repeated loading

Engineering Failure Analysis, Год журнала: 2025, Номер unknown, С. 109236 - 109236

Опубликована: Янв. 1, 2025

Язык: Английский

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Engineering properties and acoustic emission response of nanocomposite foam concrete

Materials Science and Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 16, 2025

Carbon nanotube foam concrete (CNFC) is a low-carbon and sustainable lightweight backfill material. In this paper, the cracking evolution characteristics damage patterns of CNFC during uniaxial compression were monitored by acoustic emission (AE) technique, microscopic pore structure was analyzed fractal theory. The results demonstrated that flowability within 163–176 mm, respectively. With 0.05 wt.% carbon nanotubes (CNT), 7d 28d compressive strengths (FC) increased 33.04% 27.74%, microstructural observation revealed CNT can improve stability optimize spatial distribution size. AE responses reflected excellent bridging effect effectively suppressed crack development enhanced performance FC. cost from 169.78 RMB/m 3 to 423.72 . per unit intensity CNFC0.05 17.44% CO 2 decreased 21.69%. are expected provide reference for preparation research nanocomposite concrete.

Язык: Английский

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The Impact of Coarse Aggregate Parent Rock Types on the Freeze–Thaw Performance of Concrete: A Comparative Study

Buildings, Год журнала: 2025, Номер 15(6), С. 977 - 977

Опубликована: Март 20, 2025

Hydraulic engineering projects in high-altitude environments are subject to significant diurnal temperature variations, necessitating concrete with high freeze–thaw resistance. Aggregates play a crucial role the durability of concrete. However, impact different parent rock types on concrete’s resistance remains underexplored. This study investigated effect five common coarse aggregate types—granite (Gr), tuff (Tu), sandstone (Sa), limestone (Li), and pebble (Pe)—on dam subjected cycles. The relationship between type’s properties degradation patterns aggregates under conditions was analyzed. Additionally, damage mechanisms at paste–aggregate interface were explored using SEM-EDS, pore structure analysis, nano-indentation, along characteristics hydration products transition zone. results showed that type significantly influences resistance, Gr performing best (Gr > Li Pe Tu Sa), correlating spacing. Gr, due its superior optimal for regions stringent conditions. Although zone exhibited lower elastic modulus hardness compared paste region total amount products, these differences did not substantially affect performance study, contributing expansion existing knowledge base effects provided valuable insights selection hydraulic applications regions.

Язык: Английский

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Multi-dimensional real-time data-driven identification for progressive fracturing characteristics of sandstone under freeze-thaw cycles and seepage-stress coupling

Engineering Applications of Artificial Intelligence, Год журнала: 2025, Номер 152, С. 110803 - 110803

Опубликована: Апрель 11, 2025

Язык: Английский

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Acoustic Emission for Real-Time Monitoring of Interfacial Erosion-Corrosion of Austenitic Stainless Steel in Polluted Phosphoric Acid Environment

Wear, Год журнала: 2024, Номер unknown, С. 205666 - 205666

Опубликована: Ноя. 1, 2024

Язык: Английский

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