Physical and Mechanical Properties of Serpentinized Ultrabasic Rocks in NW Turkey

Abstract

Serpentinized ultrabasic rocks crop out at various places in the northwestern part of Turkey. They are the foundation rocks of some architecture and the ground under road bases in many areas. They are also frequently used for indoor work such as tables, shafts, pilasters, jambs for chimney pieces and ornaments of different kinds. Owing to their economic importance, in situ geophysical and geotechnical studies were conducted to determine their dynamic engineering parameters such as: P-and S-wave velocities, Poisson's ratio, rigidity modulus, elasticity modulus, bulk modulus, natural period, safe bearing capacity, and bearing coefficient. Geophysical and geotechnical laboratory tests were performed on cylindrical specimens cored across and along the foliation planes: ultrasonic measurements of compressional pulse velocity (UPV), uniaxial compressive strength (UCS), point load index (Is (50) ), and static elasticity modulus (Es); effective porosity (n), dry unit weight (DUW), and saturated unit weight (! s ) sets of the rock specimens were determined. Finally, statistical correlations were performed by regression analysis to evaluate the relationships between UCS and Is (50) , UPV, Es; UPV and Is (50) , DUW, ! s , n, and Es.

The Interdependence of Mechanical Properties and Petrographic Characteristics of Ultramafic Rocks From Gerania Ophiolitic Complex

“…Similar positive correlations have been observed also for other ultramafic rocks and several authors have recommended that there is a direct and strong correlation between these two mechanical parameters in rocks (Kurtulus et al, 2011), hence an indirect estimation of one from the other can be made. The moderate correlation shown for the Gerania peridotites indicates that such an estimation involves large errors.…”

Engineering Properties of Eğirdir-Kızıldağ Harzburgitic Peridotites in Southwestern Turkey

“…The P and S seismic velocities of the layers were calculated using the Esos-Seisimager evaluation program. Using the experimental equations found in studies [32][33], [25] and [34], the elasticity modulus of rocks was determined using P and S seismic velocities values. The mean calculated P and S wave velocities were given in Table 1.…”

“…The same experiments were then repeated after samples were saturated with water and were given in Table 2. The test results of studies by [37], [12] and [25] showed that seismic velocity values parallel to foliation were always higher than those perpendiculars to foliation and this situation is due to the anisotropic properties of the rock. Based on this, the Pwave velocities (Vp) of cubic rock samples in this study were separately determined according to [38] standards , with a PUNDIT7-UPV E48 brand seismic velocity instruments and same results were obtained from the experiments.…”

“…As explained in the related standards for determine uniaxial compressive strength of rocks (UCS) which is important for engineering classification of rocks, smooth-cut cube-shaped rock samples are required. Though many studies like [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] have been completed to determine the mechanical and engineering properties of rocks with the UCS test, these studies were only completed on ultrabasic rocks with very little serpentinization [17][18][19][20][21][22][23][24][25][26][27]. In this research the engineering and mechanical properties of serpentinized ultrabasic rocks called the "Eğirdir Kızıldağ Harzburgite" [28] outcropping south of Isparta-Pazarköy in southwest Turkey were determined with geological and geophysical methods.…”

The Relationship Between P-Wave Velocity and Slake Durability Index

“…Sharma and Singh (2010) proposed a linear equation with coefficient of determination at 0.93 so as to estimate the uniaxial compressive strength through the velocity of longitudinal waves (Sharma and Singh, 2010). Kurtulus et al (2011) offered a linear equation with coefficient of determination at 0.92 so as to estimate the uniaxial compressive strength in serpentine stone through the velocity of longitudinal waves (Kurtulus et al, 2011). Altindag (2012) proposed an exponential equation with coefficient of determination at 0.79 so as to estimate the uniaxial compressive strength in sedimentary rocks (Altindag, 2012).…”