### The estimation of uniaxial compressive strength conversion

The point load (PL) test is generally used for estimation of uniaxial compressive strength (UCS) of rocks because of its economic advantages and simplicity in testing. If the PL index of a specimen is known the UCS can be estimated using conversion factors. Several conversion factors have been proposed by various researchers and they are

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Some Useful Numbers.pdf Unconfined compressive strength. Granite. MPa. Basalt. MPa. Quartzite. Field test for compressive strength of soils and rocks. Term. compressive strength (UCS) and to propose appropriate Is50 to UCS conversion factors determination of rock strength from slake

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granite ucs conversion factor. THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK. factor of 24 as a correlation between UCS and I S(50). However this conversion factor is more effective for hard rock materials than soft rock materials. The strength of soft rock materials is much lower than that of hard rock materials so the conversion factor.

Chat Online### Utilizing the strength conversion factor in the estimation

Abstract. The strength conversion factor (k) is the ratio between the uniaxial compressive strength (UCS) and the point load index (PLI) 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 metamorphic rocks.

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Some Useful Numbers on the Engineering Properties of Materials (Geologic and Otherwise) GEOL 615 Coefficient of sliding friction ( ) For most rocks varies between 0.8 and 0.5. A value of 0.60 would be a good number for general use. Glass on glass 0.4 Rubber on concrete 0.75 Steel on steel 0.55 Angle of internal friction ( Rock 30

Chat Online### Unconfined compressive strength of shale as a function of

The UCS of the rock samples can be reasonably estimated by multiplying the PLI value by a conversion factor that can range from as low as 8 to as high as 35 (Brown 1981). Research from Appalachian Shale (West ia) by Vallejo et al. (1993) has indicated a conversion factor of 12 to estimate UCS.

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Chat Online### Ucs Rock Strength Granite

Ucs Rock Strength Granite. Determination of the uniaxial compressive strength ucs of rocks is an important task for rock and geotechnical engineering applicationsrect measurement is expensive time consuming and even infeasible in some circumstances due to the difficulty in obtaining core samples.

Chat Online### Compressive strength of basalt rockMine Equipments

Some Useful Numbers.pdf Unconfined compressive strength. Granite. MPa. Basalt. MPa. Quartzite. Field test for compressive strength of soils and rocks. Term. compressive strength (UCS) and to propose appropriate Is50 to UCS conversion factors determination of rock strength from slake

Chat Online### Correlation between Uniaxial Compressive Strength and

formula for the calculation of the UCS based on corrected Is to a specimen diameter of 50 mm Is(50). The index-to-strength conversion factor (k) relating UCS to Is(50) was reported to depend on the compressive to tensile strength ratio the Poisson s ratio the length and the diameter of the rock specimen. Their theoretical prediction for k=14.9

Chat Online### CORRELATION BETWEEN UNIAXIAL COMPRESSIVE STRENGTH

established correlation. Rock types investigated are granite collected from Tumpat Kelantan and limestone from Pandan Indah Kuala Lumpur. The samples of granite and limestone are in fresh state (grade 1). Literature review shows that the conversion factor K for correlating between UCS and Is (50) lies between 16-29.

Chat Online### Utilizing the strength conversion factor in the estimation

Abstract. The strength conversion factor (k) is the ratio between the uniaxial compressive strength (UCS) and the point load index (PLI) 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 metamorphic rocks.

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Rock Type UCS Conversion Factor Norite 23 Feldspathic Pyroxenite 22 Pyroxenite 16 Parapyroxenite 28 Serpentinite 28 Granofels 26 Calc-silicate 25 These are site specific conversion factors calculated from the lab UCS tests for the major rock types (Hayes Piper 2003). These factors fall within the ISRM (1985) recommendations (Little 2006).

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granite ucs conversion factor. THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK. factor of 24 as a correlation between UCS and I S(50). However this conversion factor is more effective for hard rock materials than soft rock materials. The strength of soft rock materials is much lower than that of hard rock materials so the conversion factor.

Chat Online### Predicting the unconﬁned compressive strength of the

from the test results of SHI UCS and SDT are evalu-ated and the goodness of ﬁt of the models are explained by using intrinsic properties of rock ma-terial. Also unlike previously mentioned researchers this research is focused on weak rocks (shale) only. 4. The factors

Chat Online### The estimation of uniaxial compressive strength conversion

The point load (PL) test is generally used for estimation of uniaxial compressive strength (UCS) of rocks because of its economic advantages and simplicity in testing. If the PL index of a specimen is known the UCS can be estimated using conversion factors. Several conversion factors have been proposed by various researchers and they are

Chat Online### Correlation Between Point Load Index And Very Low Uniaxial

A correlation factor (k) between uniaxial compression strength and point load test of about (6) has been proposed for rock of very low strength of 27.5 MPa or less. This study confirms that the UCS estimation equations are rock dependent. But as the ratio of (mean UCS/mean PLT) increases the k factor increased linearly as the equation

Chat Online### Correlation between the point load index (Is(50)) and the

test size correction factor unconfined compression 1 INTRODUCTION The unconfined compression strength (UCS) is a funda-mental parameter that is often costly difficult or even impossible to determine through normalized testing 1 2 3 however it may be determined with a simple geologist hammer or with the Schmidt hammer among others 3 .

Chat Online### Correlation Between Point Load Index And Very Low Uniaxial

The conversion factor for Iraqi rocks is found to be about (5.28) for CLAYSTONE ROCK between (5.65 and 11.18) for LIMESTONE ROCK and (1.52) for greenish gray SANDSTONE ROCK which are about (8-40 ) of the conversion factor for hard rocks. The rock type is almost very low strength due to that the average UCS is below 27.5 MPa.

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Chat Online### CORRELATION BETWEEN UNIAXIAL COMPRESSIVE STRENGTH

established correlation. Rock types investigated are granite collected from Tumpat Kelantan and limestone from Pandan Indah Kuala Lumpur. The samples of granite and limestone are in fresh state (grade 1). Literature review shows that the conversion factor K for correlating between UCS and Is (50) lies between 16-29.

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Chat Online### Predicting the unconﬁned compressive strength of the

from the test results of SHI UCS and SDT are evalu-ated and the goodness of ﬁt of the models are explained by using intrinsic properties of rock ma-terial. Also unlike previously mentioned researchers this research is focused on weak rocks (shale) only. 4. The factors

Chat Online### Some Useful NumbersJackson School of Geosciences

Some Useful Numbers on the Engineering Properties of Materials (Geologic and Otherwise) GEOL 615 Coefficient of sliding friction ( ) For most rocks varies between 0.8 and 0.5. A value of 0.60 would be a good number for general use. Glass on glass 0.4 Rubber on concrete 0.75 Steel on steel 0.55 Angle of internal friction ( Rock 30

Chat Online### (PDF) Correlation Between Point Load Index And Very Low

Correlation Between Point Load Index And Very Low Uniaxial Compressive Strength Of Some Iraqi Rocks I S50UCS relationships and conversion factors Correlation between point load index

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between the strength parameters of granite. Results show that there is significant factor between tensile strength and UCS in a ratio of 1 to 10. Meanwhile for point load index I S(50) and UCS correlated the correction factor is 15 within the range of correction factor determined by other researchers.

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Ucs Rock Strength Granite. Determination of the uniaxial compressive strength ucs of rocks is an important task for rock and geotechnical engineering applicationsrect measurement is expensive time consuming and even infeasible in some circumstances due to the difficulty in obtaining core samples.

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