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doi:10.7764/rdlc.19.3

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…It can therefore be concluded that the dune sand provides the concrete with a good compactness, as its fine grains fill the voids that are present within the cementitious matrix. These results were also confirmed by Lorenzi et al [21] and Climent et al [22].…”

Section: Non-destructive Testingsupporting

confidence: 78%

Effect of Dune Sand on the Properties of Reactive Powder Concrete Reinforced with Metal Fibers

Chadli¹,

Sara²,

Ammar³

2023

RCMA

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Dune sand is widely available in Algeria. Unfortunately, it is not adequately exploited, despite the interesting properties this material may exhibit. It was revealed that using this new material could significantly alleviate the pressures on the construction sector; it may also contribute to the development of the Algerian southern regions, which contain huge amounts of dune sand. It is worth mentioning that the reactive powder concrete is a novel type of concrete that possesses a high compressive strength of up to 800 MPa. This sort of concrete uses a fine particulate matter or powder that is needed for the reactions occurring between all the constituents and hence allows manufacturing high density and high-strength sand-based concrete. It should be noted that preparing reactive powder concrete requires various materials such as cement, sand, water and some additional constituents. The major part of the concrete mixture consists of fine aggregates whose characteristics play an important role in the physical and mechanical properties of the resulting material. The present study aims primarily to investigate the effects of using dune sand on the mechanical and physical properties of fiber-reinforced reactive powder concrete. In this work, river sand has been replaced by dune sand at three different substitution ratios, i.e., 40%, 50% and 60%, successively. Then, the flexural strength, ultrasonic pulse velocity, compressive strength and modulus of elasticity (dynamic and static) were examined and assessed. The experimental findings indicated that the characteristics of the resulting material were significantly enhanced when using dune sand. This allows concluding that dune sand can be employed as an effective substitute in the formulation of reactive powder concrete. Finally, the test results indicated that the ideal dune sand replacement ratio was 60%.

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Section: Non-destructive Testingsupporting

confidence: 78%

Effect of Dune Sand on the Properties of Reactive Powder Concrete Reinforced with Metal Fibers

Chadli¹,

Sara²,

Ammar³

2023

RCMA

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“…According to their findings, the improvements in these properties ranged from 1.42 times to 3.74 times for different amounts of NC. In addition to the aforementioned studies, understanding the failure mechanisms of nano-particle-added concrete specimens with is a significant issue (Lorenzi et al, 2020). In this context, the Acoustic Emission (AE) technique proves to be valuable, being one of the nondestructive testing methods.…”

Section: Introductionmentioning

confidence: 99%

Influences of nano-clay amount on flexure behavior of concrete identified by acoustic emission

Tayfur,

Yavuz Ünal,

Alver

et al. 2024

RDLC

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Nano-modification is an effective method currently used to improve mechanical properties of concrete by adding various nanomaterials. The results obtained from previous studies demonstrate that presence of these particles has positive effects on both mechanical and durability performances of concrete. However, while the existing studies investigate the state of resistance, revealing progressive failure mechanism of nano-particle added concrete under loading is a significant subject. In this regard, Acoustic Emission (AE) method is useful for identification of invisible damage progress by means of basic phenomenon defined as release of energy due to a fracture and propagation of it as elastic waves in a stressed medium. Apart from the existing studies in the literature, this paper is focused on investigation of the influences of nano-clay on mechanical and failure behaviors of concrete by AE. For this purpose, a plain and three different concrete mixtures including 1%, 3% and 5% nano-clay (NC) of cement weight were prepared. 100x100x600 mm beam specimens were produced from these mixtures and were tested under three-point-bending. Furthermore, to reveal invisible failure mechanisms of the specimens, all tests were simultaneously monitored with AE method. The results reveal that presence of nano-clay increases the load capacity and ductility of the concrete specimens which is also confirmed by AE results, as more amount of micro-scale events are obtained.Nano-modification is an effective method currently used to improve mechanical properties of concrete by adding various nanomaterials. The results obtained from previous studies demonstrate that presence of these particles has positive effects on both mechanical and durability performances of concrete. However, while the existing studies investigate the state of resistance, revealing progressive failure mechanism of nano-particle added concrete under loading is a significant subject. In this regard, Acoustic Emission (AE) method is useful for identification of invisible damage progress by means of basic phenomenon defined as release of energy due to a fracture and propagation of it as elastic waves in a stressed medium. Apart from the existing studies in the literature, this paper is focused on investigation of the influences of nano-clay on mechanical and failure behaviors of concrete by AE. For this purpose, a plain and three different concrete mixtures including 1%, 3% and 5% nano-clay (NC) of cement weight were prepared. 100x100x600 mm beam specimens were produced from these mixtures and were tested under three-point-bending. Furthermore, to reveal invisible failure mechanisms of the specimens, all tests were simultaneously monitored with AE method. The results reveal that presence of nano-clay increases the load capacity and ductility of the concrete specimens which is also confirmed by AE results, as more amount of micro-scale events are obtained.

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Damage assessment in RC columns using the energy dissipation of ultrasonic waves

Toukal,

Labdaoui,

Kadri

2024

J Build Rehabil

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Untitled

Cited by 3 publications

References 10 publications

Effect of Dune Sand on the Properties of Reactive Powder Concrete Reinforced with Metal Fibers

Effect of Dune Sand on the Properties of Reactive Powder Concrete Reinforced with Metal Fibers

Influences of nano-clay amount on flexure behavior of concrete identified by acoustic emission

Damage assessment in RC columns using the energy dissipation of ultrasonic waves

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