Experimental and Analytical Investigation on the Interlayer of Roller Compacted Concrete

Azizmohammadi, Morteza; Toufigh, Vahab; Ghaemian, Mohsen

doi:10.1061/(asce)mt.1943-5533.0003715

Cited by 20 publications

(5 citation statements)

References 36 publications

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“…Figure 1(a) shows the distributions of hot and cold construction interfaces during an intermittent period. Experimental studies have shown that hot construction interfaces are extremely thin and have higher bond strengths, whereas cold construction interfaces have a lower performance and a more significant impact on the dam structure [11][12][13][14]. This construction interface characteristic makes an RCC dam body a layered and complicated composite structure, making it different from conventional concrete dams in terms of the deformation health diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Deformation health diagnosis of RCC dams considering construction interfaces based on monitoring data and numerical simulation

Chen,

Li,

Liu

et al. 2024

Meas. Sci. Technol.

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The health diagnosis procedure applied to determine the deformation of a roller compacted concrete (RCC) dam is different from that of a conventional concrete dam. Hence, in this study, a deformation health diagnosis model was established for an RCC dam considering the construction interfaces by combining the hydrostatic component simulated using ABAQUS (2016), with the temperature and aging components calculated using a statistical method. The combined method can help monitor the structural health of RCC dams and determine the physical meaning and statistical law of deformation of RCC dams. During the simulation process, the geometric characteristics of the construction interfaces were modelled using the interface equivalent expansion method (IEEM). The material properties were modelled using multi-output least-squares support vector regression optimized with the Jaya algorithm (JA-MLS-SVR). A case study demonstrated that the established deformation–health diagnosis model has good fitting and prediction abilities. The model and methods proposed in this study provide a new concept for the behavior analysis and numerical simulation of mass composite structures similar to RCC dams.

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Section: Introductionmentioning

confidence: 99%

Deformation health diagnosis of RCC dams considering construction interfaces based on monitoring data and numerical simulation

Chen,

Li,

Liu

et al. 2024

Meas. Sci. Technol.

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“…Silica fume (SF) is added to the cementitious mortars to reduce their porosity level and enhance their mechanical performance. Moreover, inclusion of the SF could improve durability characteristics such as sulfate resistance, the permeability of iron chloride, and freeze–thaw resistance 1–3 . Recently, many studies have been conducted on high‐performance mortars subjected to elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, inclusion of the SF could improve durability characteristics such as sulfate resistance, the permeability of iron chloride, and freeze-thaw resistance. [1][2][3] Recently, many studies have been conducted on highperformance mortars subjected to elevated temperatures. According to Yuzer et al, high temperature undermined the mechanical properties of mortar specimens regardless of whether they contained SF.…”

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confidence: 99%

Cementitious mortars containing pozzolana under elevated temperatures

Toufigh

Pachideh

2022

Structural Concrete

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In recent years, pozzolana are being increasingly used in different types of concretes and mortars. This investigation aims to evaluate the effect of replacing 7, 14, 21, and 28% cement (by weight) with silica fume (SF), granulated blast furnace slag (GBFS), zeolite, and fly ash (FA) under elevated temperatures. Forty mix designs were built with various water‐to‐cement ratios and plasticizers. Three hundred and six specimens were prepared, and the flexural, uniaxial compression and tensile tests were performed on specimens after exposure to elevated temperatures between 25°C and 900°C. The X‐ray diffraction (XRD) test was then performed on the two series of specimens. Accordingly, the results reveal that the average compressive strength of the control specimen and those containing SF, GBFS, Zeolite, and FA, respectively, is 23.17, 32.2, 34.87, 29.67, and 17.38 MPa. These values for the tensile and flexural strength tests are 0.77, 1.1, 1.02, 0.98, and 0.61 and 0.77, 1.23, 1.29, 0.93, and 0.87 MPa, respectively. Therefore, specimens containing zeolite and GBFS had better performance against heat. As per the increase in temperature, the size of the grains in the specimens containing the SF and GBFS in the XRD test shrunk less (about 6%) in contrast to those of the control specimen. The artificial neural networks (ANNs) were used to estimate the mechanical properties of the specimens at the age of 28 days.

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“…In general, in recent years, various research studies have been conducted on concrete technology issues 1–5 . The self‐compacting lightweight aggregate concrete (SCLC) benefits from the positive properties of the lightweight aggregate concrete (LWAC) and self‐compacting concrete (SCC).…”

Section: Introductionmentioning

confidence: 99%

“…In general, in recent years, various research studies have been conducted on concrete technology issues. [1][2][3][4][5] The self-compacting lightweight aggregate concrete (SCLC) benefits from the positive properties of the lightweight aggregate concrete (LWAC) and self-compacting concrete (SCC). Accordingly, the SCLC does not require external vibration; therefore, it can easily fill the formwork and surround the reinforcement with no bleeding or segregation.…”

Section: Introductionmentioning

confidence: 99%

Strength of SCLC recycled springs and fibers concrete subject to high temperatures

Pachideh

Toufigh

2021

Structural Concrete

Self Cite

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In this article, the self‐compacting lightweight concretes (SCLC) with different fibers were prepared and exposed to elevated temperatures, and their mechanical properties were investigated. Three types of fibers were steel fibers (SF), polypropylene fibers (PPF), and metal springs with a volume fraction of 0.4%. One hundred and fifty cylindrical specimens were prepared, and the compression, tensile and flexural tests were carried out on them after exposure to high temperatures ranging from 25 to 700°C. The findings indicate that incorporation of steel fibers and springs enhanced the compressive strength of concrete by 20% compared to the control specimen. Meanwhile, the polypropylene fibers increased the tensile strength up to 70% after exposure to the elevated temperatures. The flexural strength of concrete in all specimens was dramatically reduced at the temperature of 700°C. Following an increase in temperature, the bending‐induced strain energy in the specimens containing steel fibers and metal spring increased by 70% and 88% in contrast to the control specimen. Conversely, the strain energy of the specimens containing polypropylene reduced by 70%. For all concrete mixes, the threshold temperature for severe strength loss in the compressive, tensile, and flexural strength tests was 500°C, and the strengths of concrete specimens decreased remarkably at the temperature of 700°C. Finally, the use of metal springs could relatively enhance the mechanical properties of SCLC and reduce the cost.

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Experimental and Analytical Investigation on the Interlayer of Roller Compacted Concrete

Cited by 20 publications

References 36 publications

Deformation health diagnosis of RCC dams considering construction interfaces based on monitoring data and numerical simulation

Deformation health diagnosis of RCC dams considering construction interfaces based on monitoring data and numerical simulation

Cementitious mortars containing pozzolana under elevated temperatures

Strength of SCLC recycled springs and fibers concrete subject to high temperatures

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