Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8130181 | Ultrasonics | 2016 | 7 Pages |
Abstract
This study presents the effect of core length on the saturated (UPVsat) and dry (UPVdry) P-wave velocities of four different biomicritic limestone samples, namely light grey (BL-LG), dark grey (BL-DG), reddish (BL-R) and yellow (BL-Y), using core samples having different lengths (25-125Â mm) at a constant diameter (54.7Â mm). The saturated P-wave velocity (UPVsat) of all core samples generally decreased with increasing the sample length. However, the dry P-wave velocity (UPVdry) of samples obtained from BL-LG and BL-Y limestones increased with increasing the sample length. In contrast to the literature, the dry P-wave velocity (UPVdry) values of core samples having a length of 75, 100 and 125Â mm were consistently higher (2.8-46.2%) than those of saturated (UPVsat). Chemical and mineralogical analyses have shown that the P wave velocity is very sensitive to the calcite and clay minerals potentially leading to the weakening/disintegration of rock samples in the presence of water. Severe fluctuations in UPV values were observed to occur between 25 and 75Â mm sample lengths, thereafter, a trend of stabilization was observed. The maximum variation of UPV values between the sample length of 75Â mm and 125Â mm was only 7.3%. Therefore, the threshold core sample length was interpreted as 75Â mm for UPV measurement in biomicritic limestone samples used in this study.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Acoustics and Ultrasonics
Authors
Bayram Ercikdi, Kadir Karaman, Ferdi Cihangir, Tekin Yılmaz, Åener AliyazıcıoÄlu, Ayhan Kesimal,