No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Clay Disintegrator SMK. Model SMK 496 is highly efficient equipment for coarse processing of clay. This model is equipped with a single working shaft that confidently handles the task of crushing large chunks of dry or frozen clay. …
To determine the mechanical properties of artificial frozen clay under dynamic load, 81 triaxial shear tests were carried out for artificial frozen clay at different temperatures, amplitudes, frequencies, and precompressions and three kinds of testing conditions.
To study the mechanical properties of frozen saline soil under cyclic loading, the cyclic tri-axial compressive experiments of 36 samples are performed for frozen saline silty clay with 0.0, 0.5 ...
The mechanical properties of frozen soil under a complex stress state have been extensively studied using routine triaxial apparatus, with the confining pressure being an important research variable (Chang et al., 2019).The natural shallow frozen soil, represented by railway, highway, and building foundations in cold regions, is subjected to low confining pressures, …
Attapulgite has been widely used in food, chemical and building materials industries as a new mineral with a unique structure and complete application. Crushing is an essential part of the preliminary treatment of attapulgite. In general, the water content of newly excavated attapulgite is often as high as 44%. Therefore, when crushing the newly excavated …
W3Z-200-type low-temperature triaxial test system for frozen soil. The soil samples were batch-prepared with a standard preparation method, including crushing, drying in air, and …
When frozen clay is thawed, we see that the clay's surface has more free (liquid) water, but the rest of the clay itself is necessarily a bit drier. Before and during freezing, molecules of water have moved through the air in the clay body. This is the same common phenomenon that occurs when dry, fluffy snow falls to the ground and then is ...
The artificial frozen silty clay specimens were prepared in accordance with the Chinese standard MT/T593-2011 for the physical and mechanical performance testing of artificial frozen soil (Part Ι: Artificial frozen soil experiment sample and specimen preparation method). The manufacturing operation of frozen soil specimens were described as ...
It is essential and important for engineering design and maintenance to systematically investigate the physical–mechanical properties of frozen soils.At present, a series of tests have been carried out on frozen silty clay based on improved testing techniques. The results indicate that brittle and plastic failures occur for frozen silty clay under low and high …
A series of triaxial compression tests are carried out for frozen saline sandy soil with Na2SO4 contents 0.0, 0.5, 1.5, and 2.5% under confining pressures from 0 MPa to 16MPa at -6 °C, respectively.
In cold regions, the deformation characteristics of frozen soils with different coarse-grained contents change significantly under the freeze–thaw (F-T) cycles. A series of …
Stress-strain curves of frozen clay under different mean principal stresses at −6 °C. A New Strength Criterion for Frozen Clay 1341. ... phenomenon can be attributed to the so-called pressure melting and pressure crushing of the ice crystals in frozen soil [1, 2].
The strength of frozen silty clay is greater at a water content of w x (depending on the confining pressure, temperature, density and moisture) ... The brittle failure of frozen silty clay is mainly caused by the crushing and bonding fracture of soil particles. Plastic failure mainly results from the compaction of soil particles at low water ...
Frozen soil masses under various geologic conditions are usually in complex stress states and may carry complex loads with different stress paths.
The specific process of preparing the frozen soil specimen is described below: (i) The test clay was naturally air-dried and sieved through a 2.0 mm screen and then, mixed with coarse-grained particles, as shown in Fig. 3a. (ii) The distilled water was mixed with the dry soil-rock mixture to satisfy the optimal water content of 16.8%, and then, it was put in sealed bags …
According to cyclic test data of frozen clay at the temperature −10 °C, dynamic responses in various cases of confining pressures, cyclic loading amplitudes and freeze-thaw …
We conducted dynamic impact compression experiments on frozen clay with pre-existing cracks. We studied the sensitivities of crack positions, numbers, lengths, and …
This phenomenon is related to pressure melting and crushing of ice crystals in frozen clay (Fish, 1991;Ma et al., 1993; Chen et al., 2019a). As the intermediate principal stress coefficient (b ...
In other words, frozen clay and glaze can be reversed back into a workable form. How To Restore Frozen Clay? Thawing out frozen clay and glaze is the first step towards restoring them. Thawing happens when the clay and glaze are at a temperature warm enough that the frozen water crystals begin to melt, and the clay starts softening up.
The test results showed that under condition of uniaxial dynamic compression, with decrease in test temperature, the proportion of elastic segment of artificial frozen silty clay stress-strain ...
Ma et al. investigated the content of unfrozen water in frozen silty clay during the process of loading by linking the nuclear magnetic resonance system with a pressure …
Lump breaker machines, also referred to as lump crushing equipment, are size reduction machines that crush materials with their state-of-the-art blades. Lump crushing equipment is able to reduce lumps created in the production, storage or transportation of bulk solids and powders - without generating excessive dust and fines.
Wet sieving versus dry crushing: Soil microaggregates reveal different physical structure, bacterial diversity and organic matter composition in a clay gradient June 2020 European Journal of Soil ...
This phenomenon is related to pressure melting and crushing of ice crystals in frozen clay (Fish, 1991; Ma et al., 1993; Chen et al., 2019a). As the intermediate principal stress coefficient (b) increases, the long-term strength of frozen clay decreases. Therefore, the long-term strength of frozen clay is closely related to the mean principal ...
To study the mechanical properties of frozen saline soil under cyclic loading, the cyclic tri-axial compressive experiments of 36 samples are performed for frozen saline silty clay with 0.0, 0.5, 1.5 and 2.5% of Na 2 SO 4 contents at the temperature of −6 °C, respectively. The experimental results illustrate that the effect of the salt contents and confining pressures on …
In this formular, the influences of pressure meting and ice crushing were yet included. Under lower confining pressure, no ice melting and crushing occurs within the frozen saline soil, hence the Mohr-Coulomb criterion is suitable for strength characterization. ... The maximum deviatoric stress of frozen silty clay increased with the increasing ...
At this stage, the weakening effect caused by ice crushing and pressure melting was less than the strengthening effect of the confining pressure, so the strength increased. Second, ... (2019) using a hollow cylindrical apparatus indicated that the strength locus of frozen clay in the deviatoric plane also possessed these characteristics.
Two important engineering design parameters, namely, dynamic energy dissipation and fragment size distribution, are closely associated with the crushing efficiency of the frozen soil in the cold regions. The crack distribution inside the frozen soil exerted a notable effect on its mechanical properties and energy dissipation characteristics under dynamic loads.
Lightweight expanded clay aggregate (LECA) is a lightweight granular material, which can be used as an ideal backfilling geomaterial attributed to its porous particles. Through X-ray tomography images, it is found that LECA particle is a porous composite particle with a strong shell and a fragile core, originating from the sintering process of LECA production. Uniaxial …
Triaxial compression tests were conducted on frozen sandy soils under a constant minimum principal stress (σ 3 = 1.6 MPa) and various intermediate principal stresses (σ 2 = 1.6, 3.4, 5.2, 7.0, 8.8, 9.8 MPa).The purpose of the research was to investigate the influence of intermediate principal stress on mechanical properties of frozen soil, and to establish a …
