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Studies on the Mechanical Properties of Dry, Saturated, and Frozen Marls Using Destructive and Non-destructive Laboratory Approaches
Iranian Journal of Science and Technology, Transactions of Civil Engineering ( IF 1.7 ) Pub Date : 2021-06-25 , DOI: 10.1007/s40996-021-00690-z
Seyed Morteza Davarpanah , Mohammad Sharghi , Abolfazl Tarifard , Ákos Török , Balázs Vásárhelyi

The mechanical properties of frozen rocks vary significantly from the properties of the same lithology under ambient temperature. The goal of this paper is to investigate these changes in the physical and mechanical properties of rocks due to saturation and freezing. Besides, the attention was paid on discovering new correlations between the mechanical characteristics. To fulfill these objectives, 36 uniaxial compressive strength tests, 36 Brazilian splitting tests, and 48 point load tests were carried out. The samples were tested in air dry, water saturated, and frozen (− 20 °C) conditions. The measured physical and mechanical parameters were analyzed by using regression analyses. It was found that the average uniaxial compressive strength of frozen samples (21.93 MPa) is 86.4% more than saturated ones (11.76 MPa) but 25.9% less than dry specimens (29.62 MPa). Additionally, high correlations were established between uniaxial compressive strength and IS(50) under air-dry, saturated, and frozen conditions for the investigated marl samples. Furthermore, it is of particular interest to observe a high correlation with the determination coefficient (R2 = 0.95) between the constants of previously published linear regressions of UCS- Is(50) under dry status.



中文翻译:

使用破坏性和非破坏性实验室方法研究干燥、饱和和冷冻泥灰岩的机械性能

冻岩的力学性质与常温下相同岩性的性质差异很大。本文的目的是研究由于饱和和冻结引起的岩石物理和机械特性的这些变化。此外,还关注发现力学特性之间的新相关性。为实现这些目标,进行了 36 次单轴抗压强度试验、36 次巴西劈裂试验和 48 点载荷试验。样品在空气干燥、水饱和和冷冻 (- 20 °C) 条件下进行测试。通过使用回归分析来分析测量的物理和机械参数。发现冷冻样品的平均单轴抗压强度(21.93 MPa)比饱和样品(11.76 MPa)高86.4%,但为25。比干燥样品 (29.62 MPa) 少 9%。此外,在单轴抗压强度和研究的泥灰岩样品在风干、饱和和冷冻条件下的I S (50)。此外,它是特别令人感兴趣的观察与判定系数(高的相关性[R 2 的UCS-先前公布的线性回归的常数之间= 0.95)小号下干燥状态(50)。

更新日期:2021-06-25
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