Filling Capacity Evaluation of Self-Compacting Concrete in Rock-Filled Concrete

Liu, W.; Pan, Jianwen

doi:10.3390/ma13010108

Cited by 16 publications

(3 citation statements)

References 18 publications

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“…One of the most promising and green approaches in such structures is the introduction of rock-filled concrete (RFC). The performance of RFC is significantly affected by the rheological properties of SCC, mainly the filling capacity [26,27]. The passing ability evaluated during an L-box test is sufficient to estimate the performance in typical reinforced concrete structures.…”

Section: Discussionmentioning

confidence: 99%

Effect of Placement Technology on the Bond Strength Between Two Layers of Self-Compacting Concrete

Dybeł

Kucharska

2020

Materials

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Self-compacting concrete (SCC) should generally be placed continuously, but it is not uncommon for contractors to be forced to use interruptions in concrete works due to delivery delays. The multilayer casting of SCC can cause weak bond conditions in the contact area of subsequent layers. Methods of preventing cold joint or lift line formation for normal concretes are not suitable for self-compacting concretes. This article provides research on the effect of multilayer casting technology on the bond strength between two layers of SCC. Three technological variants of connecting successive layers of SCC mixture on beam elements were analyzed: The free flow of the mixture, dropping the mixture from a greater height, and mechanical disturbance of the first layer. Three delay times were applied: 30, 45, and 60 min between two layers of SCC. In general, the research revealed that, regardless of the multilayer casting variant, the bond strength between two layers decreased as the delay time was extended. The best performance and the lowest drop in bond strength were obtained for samples with a mechanically disturbed first layer, independent of the delay time. This method gave similar results to a reference element made without a break in concreting. It was also demonstrated that current recommendations and standard guidelines for multilayer casting appear to be insufficient for ensuring an adequate bond between layers.

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Section: Discussionmentioning

confidence: 99%

Effect of Placement Technology on the Bond Strength Between Two Layers of Self-Compacting Concrete

Dybeł

Kucharska

2020

Materials

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“…To obtain better pouring compactness of RFC, the interface porosity of the specimen after hardening needs to be controlled [9][10][11][12][13]. Also, some discrete element numerical simulation research [14][15][16] has been carried out for the study of pouring compactness. In terms of material properties, the standard test methods for conventional concrete are not suitable for RFC; therefore, some well-designed experiments have been developed to determine the various physical properties of RFC, including static and dynamic compressive strength, tensile strength, elastic modulus, fracture energy, density, adiabatic thermal rise, frost and seepage resistance, creep, and interface behaviors [8,10,[17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Rock-Filled Concrete Dam Compared with Conventional Vibrating Concrete Dam Using Finite Element Method

Tang,

Hou,

et al. 2024

Infrastructures

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A rock-filled concrete (RFC) dam is an original dam construction technology invented in China nearly 20 years ago. The technology has been continuously improved and innovated upon, and the accumulated rich practical experience gradually formed a complete dam design and construction technology. Seismic design is a key design area for RFC dams that still requires more investigation; therefore, this article attempts to address some questions in this area. In the article, the seismic design for a curved gravity dam, currently under construction, is compared for RFC and conventional vibrating concrete (CVC) dam alternatives based on American design documents. The conclusions drawn from investigations include the following: The displacement and stress distributions in both the CVC and RFC alternatives are similar, but the maximum computed values for the RFC dam model are slightly smaller than those for the CVC one, while the sliding resistance of both dam alternatives can meet the requirements of the specifications. Regarding the nonlinear seismic analysis results, the extent of damage in the RFC dam model is significantly reduced when compared with the CVC model, which can be explained by the higher cracking resistance of RFC. In general, the seismic performance of the investigated dam made of RFC appears to be better than that of CVC.

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“…The SCC fills the spaces between the rock skeleton and hardens and bonds it, resulting in a complete RFC. In [5], RFC was compared with conventional concrete regarding filling capacity. This cutting-edge construction technology does not need vibration and uses less cement.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Literature Review on the Elastic Modulus of Rock-filled Concrete

Ihteshaam,

Jin

2024

Eng. Technol. Appl. Sci. Res.

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Rock-Filled Concrete (RFC) is formed by pouring High-performance Self-Compacting Concrete (HSCC) into gaps between pre-placed rocks (that form a strong rock skeleton) in the formwork. An in-depth analysis of RFC's elastic modulus must focus on its static and elastic modulus behavior, strength characteristics, and sustainability aspects. Mesoscopic finite element modeling effectively incorporates pre-positioned rocks, Self-Compacting Concrete (SCC), and the Interfacial Transition Zone (ITZ) to correctly predict performance. RFC is a promising alternative to traditional construction methods, offering combined advantages for masonry and concrete techniques while reducing cement usage. Studies continue to examine the creep properties of reinforced fiber composites, with promising signs of their effectiveness in reducing hydration heat and concrete shrinkage. Subaquatic conservation agents enhance environmental stewardship in wet situations. The elastic modulus of rock-filled concrete increases logarithmically, mostly influenced by the rock-fill composition. It is crucial to study the shape, size, and rock-fill ratio of rocks in RFC that impact its stability, strength, and resistance to static and dynamic loads. Irregularly shaped rocks can enhance interlocking and mechanical properties, while a well-graded mix of sizes improves compaction and uniformity. Studying these properties enables engineers to optimize design and construction for durability and performance.

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Filling Capacity Evaluation of Self-Compacting Concrete in Rock-Filled Concrete

Cited by 16 publications

References 18 publications

Effect of Placement Technology on the Bond Strength Between Two Layers of Self-Compacting Concrete

Effect of Placement Technology on the Bond Strength Between Two Layers of Self-Compacting Concrete

Seismic Behavior of Rock-Filled Concrete Dam Compared with Conventional Vibrating Concrete Dam Using Finite Element Method

A Comprehensive Literature Review on the Elastic Modulus of Rock-filled Concrete

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