The Effect of Water Saturation on the Ultrasonic Pulse Velocities of Different Stones

Besharatinezhad, Ali; Khodabandeh, Mohammad Ali; Rozgonyi-Boissinot, Nikoletta; Török, Ákos

doi:10.3311/ppci.18701

Cited by 4 publications

(5 citation statements)

References 26 publications

(43 reference statements)

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“…He discovered a linear relationship: the Poisson's ratio of the rock mass (ν rm ), which measures the quality of the rock mass, rises as the rock mass's geological strength index, or GSI, declines. Besharatinezhad et al [48] studied the effect of GSI and Poisson's ratio of the intact rock (ν i ) on the critical height of vertical rock mass slope. They concluded that as Poisson's ratio of the intact rock (ν i ) decrease, the critical height of vertical rock mass slope increases [48].…”

Section: Poisson's Ratio In the Function Of The Geological Strength I...mentioning

confidence: 99%

“…Besharatinezhad et al [48] studied the effect of GSI and Poisson's ratio of the intact rock (ν i ) on the critical height of vertical rock mass slope. They concluded that as Poisson's ratio of the intact rock (ν i ) decrease, the critical height of vertical rock mass slope increases [48].…”

Section: Poisson's Ratio In the Function Of The Geological Strength I...mentioning

confidence: 99%

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Estimation of the Poisson's Ratio of the Rock Mass

Narimani,

Davarpanah,

Vásárhelyi

2023

Period. Polytech. Civil Eng.

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The value of Poisson's ratio is a crucial parameter in rock mechanics and engineering for both intact rock and rock mass. Poisson's ratio has not gotten the attention it merits compared to other essential mechanical characteristics of intact rock and rock mass. Limited relationships exist between rock mass classification systems (such as RMR, RMQR, Q, and GSI) and Poisson's ratio. This paper provides a comprehensive review of models proposed by various researchers for estimating Poisson's ratio for rock mass. The different methods are compared, and new general equations are derived. The results indicate that the Poisson's ratio value of rock mass is inversely proportional to its quality and strength and depends on the Poisson's ratio value of the intact rock. Specifically, a linear equation is obtained using the RMR or GSI system, showing that the Poisson's ratio increases as the quality and strength of the rock mass decrease. The Q system has a logarithmic link between the rock mass quality and Poisson's ratio. It should be noted that the derived equations are applicable only under the assumption of a homogeneous isotropic rock mass.

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Section: Poisson's Ratio In the Function Of The Geological Strength I...mentioning

confidence: 99%

Section: Poisson's Ratio In the Function Of The Geological Strength I...mentioning

confidence: 99%

Estimation of the Poisson's Ratio of the Rock Mass

Narimani,

Davarpanah,

Vásárhelyi

2023

Period. Polytech. Civil Eng.

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“…The ultrasonic pulse velocity test is a non-destructive method to evaluate the physical and mechanical properties of different soils and rocks [32,33]. In the present study, it was conducted using the PUNDIT device (Portable Ultrasonic Non-destructive Digital Indicating Tester) based on the ASTM C597.…”

Section: Ultrasonic Pulse Velocity Testingmentioning

confidence: 99%

Collapse potential and ultrasonic pulse velocity of loess soils after treatment with expanded perlite and metakaolin

Khodabandeh,

Kopecskó,

Nagy

2023

APP

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Collapsible soils, including loess, can support heavy loads at their natural humidity but then collapse rapidly and lose a substantial volume when the humidity increases. Soil collapse potential at different immersion stresses was investigated according to ASTM D5333. Different immersion stresses, including 100, 200, 300, 400, and 500 kPa, were used to evaluate the stress-strain behavior of soils before and after saturation. The results indicated that soil collapse potential rose with a raising of immersion stress, resulting in the highest soil collapse potential at 500 kPa immersion stress. Furthermore, the effectiveness of expanded perlite and metakaolin in treating loess soils was examined. The results revealed that the soil collapse potential reduced with an increase in perlite and metakaolin up to 8 %. Also, perlite had a more significant impact on the soil collapse potential than metakaolin. The interlocking force between soil particles was enhanced as the perlite quantity rose, and perlite prohibited soil particles from slipping on each other. Metakaolin decreased the soil collapsibility due to the pozzolanic and chemical reactions which increased particle bonding. The ultrasonic pulse velocity of soils decreased as the percentage of perlite increased. Because the perlite was not spread homogeneously, and the waves can be stuck in the heterogeneities, Metakaolin acted as a filler and increased the ultrasonic pulse velocity of the soils.

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“…However, obtaining samples with the appropriate geometry and quality from jointed rocks is a challenging task, making it difficult to prepare suitable samples. Therefore, prediction models have been developed based on physical characteristics and wave velocity [1,2]. Numerous studies have been performed by various researchers to estimate the geo-mechanical properties in dry and saturated conditions [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Rock's Brittleness and Dynamic Properties Utilizing Effective Artificial Intelligence Approaches

Xie,

Wang,

et al. 2024

Period. Polytech. Civil Eng.

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This research aims to determine the brittleness index (BI) and engineering properties of limestone specimens. In addition, this study evaluates the effect of moisture on the developed models to predict the BI and shear wave velocity (Vs), based on the point load index (Is50), dry and saturated tensile strength (Ts-d and Ts-s), and porosity. Gaussian process regression (GPR), multilayer feed-forward neural network (MFFNN), and multiple linear regression (MLR) predictive models were utilized. Microscopic examination of the limestone specimens revealed that calcite is the predominant mineral. It was observed that samples with higher calcite content exhibited greater brittleness and strength properties while having lower porosity. The results obtained from the MLR analysis demonstrated that it is possible to accurately forecast the brittleness index (BI), as well as the dry and saturated shear wave velocities (Vs-d and Vs-s) at the specific sites under investigation. The moisture effect on developed models showed that Vs prediction in dry conditions (Vs-d) was less accurate compared to the saturated conditions (Vs-s). Conversely, the relationships developed for estimating the BI in dry conditions exhibited higher accuracy. The analysis of all model assumptions using MLR indicated that the models could be reliably utilized. However, the MFFNN and GPR methods were found to be more conservative in estimating these properties. Moreover, the study identified the best transfer function and training algorithm for predicting Vs and BI. The evaluation metrics, such as R2 and RMSE revealed that GPR demonstrated higher precision compared to MFFNN and MLR.

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The Effect of Water Saturation on the Ultrasonic Pulse Velocities of Different Stones

Cited by 4 publications

References 26 publications

Estimation of the Poisson's Ratio of the Rock Mass

Estimation of the Poisson's Ratio of the Rock Mass

Collapse potential and ultrasonic pulse velocity of loess soils after treatment with expanded perlite and metakaolin

Prediction of Rock's Brittleness and Dynamic Properties Utilizing Effective Artificial Intelligence Approaches

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