Results 21 to 30 of about 37,255 (261)

Mechanical and hydraulic performance of sludge-mixed cement grout in rock fractures [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2014
The objective is to assess the performance of sludge mixed with commercial grade Portland cement type I for use in minimizing the permeability of fractured rock mass.
Khomkrit Wetchasat, Kittitep Fuenkajorn
doaj   +1 more source

Mechanical properties and acoustic emission characteristics of two dissimilar layers of rock-like specimens with prefabricated parallel fissures

open access: yesGeomechanics and Geophysics for Geo-Energy and Geo-Resources
Through the uniaxial compression test of double parallel fissured layered rock mass, the mechanical properties of layered rock mass with different fissure dip angle, and the characteristics of acoustic emission (AE) parameters in the process of fracture ...
Jun Hu   +7 more
doaj   +2 more sources

The main rock types of the Bazhenov formation on the Surgut arch and adjacent territories

open access: yesGeoresursy, 2017
As a result of long-term studies of the Bazhenov Formation sediments a classification of rock types based on the results of macro- and micro-study of core material, confirmed by the results of X-ray diffraction and X-ray fluorescence analyzes and ...
O.M. Makarova   +8 more
doaj   +2 more sources

Fracture evolution and anisotropic mechanical properties of layered rock based on discrete element modeling and experimental study

open access: yesAlexandria Engineering Journal
Since numerous geotechnical activities crossing layered rock masses, a comprehensive understanding of their mechanical behavior is crucial for engineering stability assessment.
Minglang Zou   +5 more
doaj   +2 more sources

Neptune and Uranus: ice or rock giants? [PDF]

open access: yes, 2020
Existing observations of Uranus and Neptune’s fundamental physical properties can be fitted with a wide range of interior models. A key parameter in these models is the bulk rock:ice ratio and models broadly fall into ice-dominated (ice giant) and rock ...
Irwin, P G J   +3 more
core   +2 more sources

Pore-Scale Characterization and PNM Simulations of Multiphase Flow in Carbonate Rocks

open access: yesEnergies, 2021
This paper deals with pore-scale two-phase flow simulations in carbonate rock using the pore network method (PNM). This method was used to determine the rock and flow properties of three different rock samples, such as porosity, capillary pressure ...
Haiyang Zhang   +3 more
doaj   +1 more source

Estimating pore volume compressibility by spheroidal pore modeling of digital rocks

open access: yesPetroleum Exploration and Development, 2020
: The real pores in digital cores were simplified into three abstractive types, including prolate ellipsoids, oblate ellipsoids and spheroids. The three-dimensional spheroidal-pore model of digital core was established based on mesoscopic mechanical ...
Weibo SUI   +3 more
doaj   +1 more source

Calibration of Sm-Nd mixed spike by teflon powder method

open access: yesJournal of Analytical Science and Technology, 2010
Isotopic composition of Sm-Nd mixed spike was calibrated by teflon powder method. Sm and Nd isotopic compositions of the spike were externally calibrated with reference to the nNdβ standard and normal Sm.
Chang-Sik Cheong, Sung-Tack Kwon
doaj   +1 more source

Processes of rainfall infiltration,runoff and sediment yield on purple soil slope containing rock fragments

open access: yesShui kexue jinzhan, 2014
Based on indoor rainfall simulation tests carried out with a soil bin,measurements are made for various physical processes including the rainfall infiltration,the surface runoff,the sediment yield,the velocity of interrill flow and the velocity of rill ...
WANG Xiaoyan   +3 more
doaj   +1 more source

Inhibitory mechanism of fly ash on alkali-silica reactivity of siliceous rock fine aggregate: A case study of Yangxi concrete dam

open access: yesCase Studies in Construction Materials, 2023
The fine aggregate of siliceous rock has the advantages of high production efficiency, stable yield and low construction and transportation cost. The Yangxi concrete dam was firstly apply siliceous rock as fine aggregate to a large concrete project of ...
Jianguo Chen   +5 more
doaj   +1 more source

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