ucs conversion factor

Utilizing the strength conversion factor in the estimation ...

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.

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].

The estimation of uniaxial compressive strength conversion ...

The I S (50) has been demonstrated as a feasible estimation of the UCS. 23, [70][71][72][73][74][75] Although the ISRM suggested that the conversion factor between the UCS and I S (50) varies ...

The estimation of uniaxial compressive strength conversion ...

Utilizing the strength conversion factor in the estimation ...

Feb 10, 2015· 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 metamorphic rocks.

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 dependent upon the rock type.

A preliminary study on the conversion factor used in the ...

Sep 02, 2015· The UCS–BPI conversion factor for this correlation is 5.1. In this study, the relation between UCS and BPI was investigated for pyroclastic rocks. Twenty-eight different samples of pyroclastic rocks were collected from the Cappadocia Region of Turkey. The UCS and BPI tests were carried out on the oven-dried samples in the laboratory.

USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL ...

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 ...

The estimation of uniaxial compressive strength conversion ...

Jul 01, 2017· The UCS to I S50 conversion factor for interbeds has a value of "25.96". This value is very close to some of the reported values (Broch and Franklin, 1972, Hassani et al., 1980, ISRM, 1985). The trona conversion factor is also in agreement with Sabatakakis et al. (2008) and Singh et al. (2012) who revealed that strength conversion factor is ...

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

(PDF) A preliminary study on the conversion factor used in ...

The UCS–BPI conversion factor for this correlation is 5.1. In this study, the relation between UCS and BPI was investigated for pyroclastic rocks. Twenty-eight different samples of pyroclastic ...

The estimation of uniaxial compressive strength conversion ...

In the literature, conversion factors on different sedimentary, igneous and metamorphic rocks can be found, but no study exists on trona. In this study, laboratory UCS and field PL tests were carried out on trona and interbeds of volcano-sedimentary rocks. Based on these tests, PL to UCS conversion factors of trona and interbeds are proposed.

Utilizing the strength conversion factor in the estimation ...

Feb 10, 2015· 10%· 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 metamorphic rocks.

THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

strength (UCS). Broch and Franklin [17] suggested a conversion 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

The determination of uniaxial compressive strength from ...

Feb 20, 2014· They concluded that a conversion factor of 21–24 should be used for harder rocks and 14–16 for softer rocks. Wood and Shaw (2012) investigated the relation between the UCS and I s for weak Cretaceous sandstone with a UCS lower than 40 MPa.

(PDF) The Uniaxial Compressive Strength of Soft Rock

The relationship between the point load strength index (PLI), Is(50), and the uniaxial compressive strength, UCS, is expressed by a conversion factor, K. This parameter, ...

(PDF) Conversion of point load test results to ...

The point load strength index (Is) was evaluated from Eqs. (6-7) and correlated to UCS by a coefficient factor (Eq. (8)). Rusnak and Mark (1999) had proposed 21.9 as conversion factor for typical ...