+86-21-58386256
Basic measurements required for a proper static-dynamic rock properties determination were presented in a previous paper by the same authors. Biot's theory and Walsh's microcrack analysis are combined to study static-dynamic property relations. In the absence of microcracks, Biot's relations are used to compute static ''uncracked'' rock properties using density, porosity, and the travel times ...
Aug 22, 2019· sandstone has lower mechanical properties and higher water absorption and porosity levels than those. of limestone. Therefore, the frosting process (freeze-thaw cycles) that …
Jun 10, 2021· Results indicated that the mechanical properties of sandstone were significantly reduced by freeze–thaw effect. Sandstone' peak strength and …
3.2 Mechanical properties of sandstone after thermal treatment 3.2.1 Stress‐strain curves of sandstone. Figure 5 shows the stress‐strain curves of the sandstone after thermal treatments of 25°C, 200°C, 400°C, 600°C, 800°C, and 900°C. Clearly, the deformation and mechanical behaviors of the thermally treated sandstone deteriorated ...
Determination of some thermo-mechanical properties of Sirahama sandstone under subzero temperature condition Author YAMABE, T 1; NEAUPANE, K. M 2 [1] Department of Civil and Environmental Engineering, Saitama University, Japan [2] Civil Engineering Program, SIIT, Thammasat University, Pathumthani 12121, Thailand
Petrographic and Mechanical Properties of Sandstone from Murree Fo rmation, Jena Kor Area, Peshawar Basin … 71 of time that determine whether or not a rock will be
Title: Mechanical and acoustical properties of sandstones and shales Author: Diane Jizba Subject: thesis Keywords: SRB Volume #45 Created Date: 11/3/1999 10:48:50 AM
An extensive database of mechanical strength measurements has been compiled for sandstone-to-shale siliciclastic rocks including detailed petrographic and petrophysical characterization.
ResearchArticle Experimental Study on the Mechanical Properties of Sandstone under the Action of Chemical Erosion and Freeze-Thaw Cycles Lizhuang Cui,1 Nan Qin,1,2,3 ...
Title: Mechanical and acoustical properties of sandstones and shales Author: Diane Jizba Subject: thesis Keywords: SRB Volume #45 Created Date: 11/3/1999 10:48:50 AM
Dolerite-sandstone and Sakhi Sarwar is composed of mixed limestone (55%) and sandstone (45%). Step 4: Trial mixing to calculate optimum binder content and testing. Step 3: Testing of basic properties of bitumen and aggregates.
In such measurements, the mechanical properties such as uniaxial compressive strength (UCS) and Young's modulus (E) are related to the porosity of sandstone and shaly sandstone. However, in many instances, the porosity fails to directly correlate to mechanical properties especially when dispersed clays are present.
The Remlingen sandstone, however, exhibits on average slightly reduced values and a lower range of results. This can be explained by the varying mechanical properties as well as the more pronounced inhomogeneity of the Flechtingen sandstone.
Nov 02, 2020· In order to understand the mechanical properties and energy dissipation law of frozen sandstone under impact loading, the cretaceous water-rich red sandstone was selected as the research object to conduct impact tests at different freezing temperatures (0°C, −10°C, −20°C, and −30°C). The test results suggested the following: (1) the peak stress and peak strain of frozen sandstone are ...
mechanical properties of st. peter sandstone . a comparison of field and laboratory results . a thesis . submitted to the faculty of the graduate school . of the university of minnesota . by . michael eugene dittes . in partial fulfillment of the requirements . for the degree of . master of science . december, 2015
Nov 25, 2019· The mechanical properties of rocks are significantly affected by chemical corrosion. To explore the influence of chemical corrosion on the weakening laws of sandstone mechanical properties, the porosity and pore size distribution (PSD) of sandstone samples immersed in different chemical solutions was measured by the nuclear magnetic resonance (NMR) technique. The damage …
Mar 01, 2019· The mechanical properties, fracture process and failure patterns were investigated by means of stress-strain, strain field and acoustic emission (AE) measurements. Special attentions were paid to the filling effect on crack behavior of pre-holed sandstone and detailed observation of crack development inside inclusions. 2. Test methodology2.1.
Aug 09, 2021· The presence of water has a significant influence on the mechanical and physical properties of rocks encountered in deep rock engineering (Vásárhelyi 2006; Wang et al. 2020b).During engineering, the mechanical properties and microstructure of rocks are likely to be modified, reducing the strength of the surrounding rock mass and leading to structural failure (Zhang and Feng 2015).
Feb 01, 2007· Mechanical properties of rock at high temperature are of importance for structure design and safety assessment in underground rock engineering. Brazilian disc test, axial compressive test and three-point bending test are adopted to determine the tensile strength σ t, uniaxial compressive strength σ c, elastic modulus E and Mode I fracture toughness K IC of sandstone at high temperature. Test ...
Mar 31, 2020· Weathering is one of the important geological hazards to many stone cultural relics carved on feldspar sandstone (such as the Datong Yungang Grottoes). To study the mechanical properties of the weathered Yungang Grottoes, feldspar sandstone was subjected to comparative dry-wet cycle tests with water-rock interaction (Group A) and salt-rock interaction (Group B).
Oct 01, 2021· The three-dimensional process for sandstone specimens, which uses glue to bind and compact powder particles, produces printed sandstone specimens with similar mechanical properties to natural sandstone. 33 Therefore, the printed sandstone specimens in this study were printed using the three-dimensional process.
Mechanical Properties of the Hard Sandstone Fracture Surface under Hydrochemical Corrosion Bin-wei Xia, 1, 2 Ming-xiang Xu, 1, 2 and Chao Pan 1, 2 1 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
Jul 05, 2016· If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass Volume 39, Issue 4 (July 2016) Experimental Study on Degradation of Mechanical Properties of Sandstone Under Different Cyclic Loadings
PETROGRAPHIC, PHYSICAL AND MECHANICAL PROPERTIES OF SANDSTONE OF MIRPUR DISTRICT AREA STATE OF AJ&K, PAKISTAN . ... Different Sandstone from different location were collected from the area which is easily accessible and best outcropped with standard size 6/6 inches by helping geological equipment's. After the preparation of the samples, the ...
Mar 31, 2020· To study the mechanical properties of the weathered Yungang Grottoes, feldspar sandstone was subjected to comparative dry-wet cycle tests …
Aug 09, 2021· In the mechanical test of sandstone under uniaxial load, the strain curve of loaded sandstone was analyzed. With the action of load, the rock was finally compressed and destroyed. This macroscopic mechanical appearance was the qualitative change caused by …
Physical Properties of Sandstone. Physical properties of rocks are used to identify the type of rocks and to discover more about them. There are various physical properties of Sandstone like Hardness, Grain Size, Fracture, Streak, Porosity, Luster, Strength etc which defines it.
Mar 01, 2021· To investigate the mechanical properties and failure mode of sandstone specimens with prefabricated cavities, experiments were conducted on sandstone samples with the borehole axis parallel to different principal stresses and for varying borehole depths and diameters using a novel true triaxial geophysical apparatus.
4.1. Mechanical Properties of Sandstone under Uniaxial Compression. The simulation results of the specimen at α = 45° are selected to analyze the distribution characteristics of the stress. Figure 8 represents the elastic modulus distribution and principal stress in specimen when α = 45° at the initial loading stage. Due to heterogeneity of ...
However, the mechanical properties of these rock-like materials are quite different from those of real rock. Therefore, in the present study, uniaxial compression tests were performed on prismatic sandstone specimens containing an inclusion of various properties, …