Effect of Limestone Powder Fineness on the Physical and Mechanical Performance of Concrete

Materials, Год журнала: 2025, Номер 18(4), С. 835 - 835

Опубликована: Фев. 14, 2025

To study the impact of limestone powder (LP) fineness on physical and mechanical characteristics concrete, a total 88 sets LP concrete mixtures were designed, in which content (0~35% mass cementitious materials), LP-specific surface area (350-1000 m2/kg), water-binder ratio used as testing factors. The experimental theoretical approaches performed to (slump) properties (compressive strength bond-slip behaviors with steel bars) concrete. Secondly, compressive activity index (CAI) was introduced measurement for quantifying LP. results indicate an optimal improvement when is equal or less than 15% specific 600 m2/kg. An increase will result drop bond between bars; contrast, enhance strength. Furthermore, CAI can better reflect role provides basis application

Язык: Английский

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Spray-based 3D printed tunnel slag concrete: Evaluation for printability and mechanical performance

Construction and Building Materials, Год журнала: 2025, Номер 467, С. 140392 - 140392

Опубликована: Фев. 15, 2025

Язык: Английский

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Assessing the mechanical properties and workability of concretes with stone powder as a sustainable alternative material to natural sand

REM - International Engineering Journal, Год журнала: 2025, Номер 78(spe1)

Опубликована: Янв. 1, 2025

Abstract The extraction of sand from riverbeds through dredging is a common practice in construction and has given rise to significant environmental repercussions. Sand removal contributes heightened turbidity alterations watercourses, reshaping the original channels due equipment utilization, disrupting their flow. In response these challenges, crushed stone dust emerges as sustainable alternative material for partially or entirely replacing natural concrete production. This study aimed evaluate mechanical properties workability with characteristic compressive strength 25 MPa, employing total replacement (100% dust) partial (50% 50% sand). materials utilized encompassed stone, sand, Portland cement CP II F - 32, dust, superplasticizer additive. results indicated no difference (P < 0.05), values 36.85 MPa 30.31 replacement, respectively, comparable reference (33.47 MPa). terms tensile by split testing, achieved 3.09 3.23 while mix recorded 3.31 MPa. Total posed challenges fresh concrete, necessitating higher dosage superplasticizer. conclusion, demonstrates its capacity substitute either partially, upholding traditional concrete. However, careful consideration impact on essential when opting fine aggregate.

Язык: Английский

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Study on flexural behavior of laminated slabs constructed with composite limestone powder-tailings mixed sand concrete

Structures, Год журнала: 2025, Номер 77, С. 109169 - 109169

Опубликована: Май 11, 2025

Язык: Английский

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Damage constitutive model of manufactured sand concrete for bridges under composite salt freeze-thaw cycles

Construction and Building Materials, Год журнала: 2025, Номер 483, С. 141339 - 141339

Опубликована: Май 13, 2025

Язык: Английский

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