Xie Ni shelly93111@163.com 0000-0001-7304-3333 2026 Acoustic Emission and P-wave velocity measurement of sandstone collected from Three Gorges Reservoir, China under uniaxial compression and related water-rock reaction by chemical analyze and microscopic observation dataset bundled publication https://doi.org/10.1594/PANGAEA.923969 2026-02-05T07:30:39 This dataset contains the results of both P-wave velocity and Acoustical Emission activity measurements of dry and saturated sandstone, collected from the Three Gorges Reservoir (TGR) area, under uniaxial loading to investigate the stress-induced damage evolution and examine the effect of water on it. Chemical analyses of the sandstone soaking water and microstructural observations were also conducted to study the chemical effects of distilled water on the microstructure of sandstone. All the uniaxial compression tests were performed on the large-volume servo-controlled Material Testing System (MTS 815.03). Axial strain was continuously measured by two extensometers and circumferential strain by a chain strain gauge. An AE system was integrated with MTS loading system including acoustic detectors and analysis softwares. There were four miniature piezoceramic transducers (PZTs) mounted on sample surface for continuous recording of AE outputs. Transducer signals were amplified by 40 dB using Physical Acoustic Corporation (PAC) preamplifiers. The threshold amplitude was also set to be 40 dB. AE signals were stored in an 18-channel transient recording system at 40 MHz sampling rate. The resonant frequency of the piezoelectric sensors is 2500 kHz. Xie Ni shelly93111@163.com 0000-0001-7304-3333 Tang H M Yang J B Jiang Q H 2022 Damage Evolution in Dry and Saturated Brittle Sandstone Revealed by Acoustic Characterization Under Uniaxial Compression journal article Rock Mechanics and Rock Engineering 55(3) https://doi.org/10.1007/s00603-021-02716-4 1303-1324 110.6157999999997 110.6157999999997 30.960279999999916 30.960279999999916 110.6157999999997 30.960279999999916 not specified 28 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ lateral strain | Strain | Epsilon | Circumferential strain by a chain strain gauge | axial strain | Two extensometers | stress | Principle stress | SigmaP | Large-volume servo-controlled Material Testing System, MTS 815.03 | volumetric strain | Calculated | σ1/σp (ratio between applied stress and peak strength) | Ratio | Vp90° (along axial) | Velocity, compressional wave | Vp | Vp0° | σ1 | Vp0°/Vp0°i(ratio between Vp0° and its initial value before loading) | Two extensometers and circumferential strain by a chain strain gauge | Negative slope of cumulative amplitude-frequency distributions | b-value | Acoustical emission rate | AER | Piezoceramic transducers (PZTs) mounted on sample surface | Identification | ID | DD | Number | n | Time Stamp | Channels | Risingtime | Rising time | Rising | Counts | Amplitude | Solution sample | Sample comment | Calcium | Ca2+ | Magnesium | Mg2+ | Sodium and potassium ions | [Na+]+[K+] | Chlorine | Cl | Sulfate | [SO4]2- | Bicarbonate ion | [HCO3]- | File content | Content | Binary Object | Binary citable AE activity microctrusture P-wave velocity water weakening effect method12888 method12889 method12890 method13281 method13282 method50 param106330 param130836 param145348 param146419 param16067 param18011 param182712 param188346 param188347 param191527 param191528 param31 param50534 param7056 param77489 param79652 param79654 param84659 param88114 param88115 param88340 param99583 pi78455 author107300 author107301 author107302 author78455 geocode1600 geocode1601 journal14277 license21 ref106155 term60697 term60698 term60699 term60700 topotype1