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These equations provide a practical tool for estimating the value of UCS, and also gives further insight into the controlling factors of the strength of the granitoid rocks, where the …
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A conversion factor of carbonate rocks in the linear regression without intercept for UCS–PLI, UCS–BTS, UCS–SHR, and UCS-E was observed as 14.32, 7.26, 1.71, and 3.52, respectively.
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The Setul Formation consists of crystalline, hard-brittle, dark-coloured, thickly bedded, variably impure, crystalline limestone with subordinate detrital facies consisting of quartzite, flagstone ...
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Furthermore, these results also show that the conversion factor to convert a PLI to a UCS value can vary for both concrete and granite samples by up to , depending on the irradiation time and heating (Fig. 10 b). Therefore, a fixed conversion factor for PLI to UCS, as various approaches summarized in Ref. 84 suggest, seems even more ...
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Table 2 Conversion factor between UCS and PLI obtained from zero-intercept regression analysis. Full size table. 3 Results and Discussion. The plots of UCS versus PLI in Figs. 2, 3, 4 clearly indicate that the relation is different for different rock types, rather than being consistent for all the rock types. This may be due to the anisotropic ...
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relationship between UCS and the point load strength could be expressed as: UCS = (K) Is50 = 24 Is50 (2) Where K is the "conversion factor." Subsequent studies found that K=24 was not as universal as had been hoped, and that instead there appeared to be a broad range of conversion factors. Table 1 summarizes published results obtained for ...
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A conversion factor of carbonate rocks in the linear regression without intercept for UCS–PLI, UCS–BTS, UCS–SHR, and UCS-E was observed as 14.32, 7.26, 1.71, and 3.52, respectively.
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The linear regression analysis results which consists conversion factor and correlation coefficient for each rock type are presented in Table 2. Results and Discussion Having studied the UCS versus PLA graphs and ITS versus PLD graphs for different rocks it becomes quite clear that, the conversion factors are different for different rock types.
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sbm granite ucs conversion factor.md; Find file Blame History Permalink b · f661b88d dushusbm authored Nov 02, 2022. f661b88d ...
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The axial PLT is used to measure the UCS The Point Load Index Is50 is converted to UCS by the following equation UCS = K Is50 1 Where K is the Conversion Factor Mark and Molinda 6 originally adopted the K values proposed by Vallejo 7 for the CMRR which were K=125 for clay-rich rocks and K=174 for silty and sandy rocks...
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The results of each test exhibited significant discreteness, among which the UCS has a maximum value of 112 MPa and minimum value of 15.18 MPa, indicating the UCS is linearly correlated with ...
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Conversion factors correlating point load strength with uniaxial compressive strength are subject ... which the errors involved in conversion from Is (50) to UCS on a small sample (but acceptable within the guidelines suggested by the ISRM) are much larger. ... stone and sandstone. results rather than derived UCS values.
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The result for bulk density and UCS test for granite and limestone are listed in Tables 1 and 2.The bulk density value range from as low as 2.46 g/cm 3 to a high of 2.59 g/cm 3 for granite and between 2.48 to 2.68 g/cm 3 for limestone as summarised in Table 3.The UCS value ranges from 35.97 to 59.77 MPa for granite and from 9.41 to 42.06 MPa for limestone.
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Rock Schmidt Conversion Curve Database ... UCS = 0.4367e(0.05R*) Granite (Grade I to IV) 2 to 33 0.437 0.05 23 76 . Title 2 / 3 2. Rock Schmidt RS8000 Type L UCS Reference Correlation Rock Type Validity range Coefficients Valid Range for R* UCS ...
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Abstract The strength conversion factor (k) is the ratio between the uniaxial compressive strength (UCS) and the point load index (PLI). It has been used to estimate the UCS from the PLI since the 1960s. Many researchers have investigated the relationship between UCS and PLI for various rock types of different geological origins, such as
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Thus, conversion factors ranging from 0.8 to 0.9 are suggested to convert the cubic compressive strength to cylindrical compressive strength [52]. When the cubic compressive strength ( f c,cube ...
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The powder factor for blast rounds ranges between 0.59 and 1.03 kg/m 3 . This powder factor range is within the Ash (1990) powder factor recommendation, classified as very high by Agyei and ...
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In the case of pink and white granite the correction factors are F=(De/50)0.9 and F=(De/50)1.4 respectively. ... with the UCS was analysed to propose appropriate Is50 to UCS conversion factor for ...
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UCS ¼ kI sð50Þ ð2Þ where k is the index-to-strength conversion factor. Besides the y = ax form, the y = ax ? b form was also experi-mentally confirmed by some researchers (Kahraman and
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The strength conversion factor (k) is the ratio between the uniaxial compressive strength (UCS) and the point load index (PLI). It has been used to estimate the UCS from the PLI since the 1960s. Many researchers have investigated the relationship between UCS and PLI for various rock types of different geological origins, such as igneous, sedimentary, and …
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Granite 154 48 313 71 169 42 250 20 Granodiorite 160 51 319 2 171 20 118 2 Gabbro 228 106 466 5 248 76 306 1 Norite 229 82 356 8 - - - - Olivinestone - - - - 87 113 1307 5 ... is the factor for intact rock in the Hoek Brown failure criterion for rock masses. Values in brackets have been …
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3 Tables 1 and 2 show the conversion factors between UCS and PLA for shale and limestone rocks from several studies, respectively [6, 7, 8, 9].
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To obtain the unconfined compressive strength (UCS) from point load testing (PLT) a conversion factor is commonly used; UCS = conversion factor * I s. ODOT research (Shakoor and …
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The range of UCS value of granite is 24.55–65.23 MPa and for limestone samples is about 4.17–91.78 MPa. This study proved that a correlation with an easily measured physical …
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The focus of this paper is to present the data analysis used to correlate the point load test index (Is50) with the uniaxial compressive strength (UCS), and to propose appropriate Is50 to UCS …
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The experimental setup and failure pattern of the granite samples under the uniaxial compression tests are given in Fig. 4 e and f, and the granite specimens failed with distinct conjugate diagonal macroscopic fracture surfaces. Five compression tests are conducted to yield every UCS result for the rocks listed in Table 2.
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The strength conversion factor (k) is the ratio between the uniaxial compressive strength (UCS) and the point load index (PLI). ... The result for bulk density and UCS test for granite and limestone are listed in Tables 1 and 2.The bulk density value range from as low as 2.46 g/cm 3 to a high of 2.59 g/cm 3 for granite and between 2.48 to 2.68 ...
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where k is the index-to-strength conversion factor. Besides the y = ax form, the y = ax + b form was also experimentally confirmed by some researchers (Kahraman and Gunaydin 2009; Basu and Kamran 2010; Gunsallus and Kulhawy 1984).An exponential form of y = ax b was also reported by Grasso et al. ().A prediction equation similar to Eq. can be used to correlate …
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