高性能自密实混凝土在斜面填石结构孔洞中的流动模式监测

IF 6 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-02-21 DOI:10.1016/j.asej.2025.103313

Ahmed A. Nasr , Baizhi Wang , Songgui Chen , Feng Jin

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引用次数: 0

摘要

填石混凝土（RFC）将岩石与高性能自密实混凝土（HSCC）结合在一起，将岩石稳定性与优越的混凝土性能相结合。有效的HSCC胶结，特别是在隐蔽区域，对于RFC的结构完整性至关重要，但通过复杂的岩石间隙的流动给充填性能的量化带来了挑战。本研究使用实时监测系统来研究倾斜岩石表面上的HSCC流动，以跟踪其行为和效率。分析了边坡、流动性、岩石粒度、粗骨料粒度等关键因素。结果表明：流动性的提高促进了空腔充填，较小的岩石增加了颗粒互锁，较大的坡度加快了流速，但不能保证均匀充填。有效铸造的最佳参数为坍落度600 ~ 700 mm、岩石尺寸12.5 ~ 15 cm、岩石骨架坡度1:2。最后，建立了高强度混凝土通过倾斜岩石间隙的流速预测公式，为高效施工RFC和提高结构性能提供了见解。

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Monitoring the flow patterns of high performance self-compacting concrete in the voids of sloped rock-filled concrete structures

Rock-filled concrete (RFC) integrates rocks with high-performance self-compacting concrete (HSCC), combining rock stability with superior concrete properties. Effective HSCC cementation, especially in concealed areas, is critical for RFC’s structural integrity, but flow through intricate rock interstices poses challenges in quantifying filling performance. This study investigates HSCC flow on inclined rock surfaces using a real-time monitoring system to track behavior and efficiency. Key factors such as slope, flowability, rock size, and coarse aggregate size were analyzed. Results show that improved flowability enhances cavity filling, smaller rocks increase granular interlocking, and greater slopes accelerate flow velocity but do not ensure uniform filling. Optimal parameters for effective casting are a slump flow of 600–700 mm, rock sizes of 12.5–15 cm, and a rock skeleton slope of 1:2. Lastly, a predictive formula for HSCC flow velocity through inclined rock interstices was developed, providing insights for efficient RFC construction and enhanced structural performance.

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.