In addition, insulation material is utilized for ensuring that the sample will freeze in a single direction (Fig. 1b). The shape and texture on its surface provide crucial information about its origin as well as the history of deposition and transport 5,6,7 and 8,9,10 and 11 . Test apparatus: ( a ) Freeze-thaw test instrument; ( b ) Schematic diagram of freeze-thaw tests for soil samples. ( the third ) Particle Image Processor.1 The shape of the particles is dependent on the rock’s parent material and weathering, while the final shape is dependent on the medium used for transport and the transport method.
In order to study the shape and shape changes of soil specimens following freeze and thaw cycles using a particle image processing (Fig. 1c) was used to examine the soil specimens following freezing and the thawing process.1 When the medium used for transport is a fluvial medium the average size of the particle is Skewness (Skewness is an reflection of the the size of the sediment grains) the lithology, shape, and roundness are all related to distance. The range of measurement for the particle image processors employed in the experiment is 0.5 millimeters to 3000 millimeters Repetition accuracy: 1 %.1 Rounding rate is directly proportional to a certain quantity of distance 12 . The data processing technique that the image processing processor uses is measuring background adjustment as well as adjustment particle image conversion and transmission particle image binarization, edge search as well as calculations of parameters of particles such as analysis statistics, and results output.1
Numerous abrasion features, including V-shaped pits sharp edges, sharp edges and curved grooves generally provide evidence of transportation in an aquatic medium 13,14 . The computer detects the edges of the particles based upon the received signal of binarization and then calculates automatically the size, aspect ratio , and roundness that each particle.1 In an aeolian ecosystem because of the size of the particles the saltation abrasion is selective and transports and shape, the majority of particles have subrounded, well-sorted grains 15,16,17,18 . The typical image (i.e. the field of view of an imager) comprises from a couple of or hundreds of particle.1 Furthermore the mineral constituents include feldspar, quartz and Calcite. The imager calculates automatically and count all particles within the view field to generate the report. Aeolian quartz characteristics include meandering ridges and upturned platesand bulbous edges, and the adhering of quartz 14 .1 If there aren’t enough particles assessed, the microscope can be adjusted to shift to the next area of view and continue to test and count. However, there are only a few studies of the characteristics of shape of particles in the process of freeze-thaw (cryogenic weathering).
This processor may produce data like aspects ratio (Fig. 2a), roundness (Fig. 2b) Specific surface area and variation in grain size.1 Recent studies have demonstrated that the aggregation and fragmentation of soil particles creates the phenomenon of silt level enrichment 3,19,20 and 21,22. Schematic diagram of the aspect ratio ( A ) and the roundness ( roundness ( ). This is the only physical weathering characteristic for cryogenic soil.1 Test the program. The degree of siltylation that occurs in cryogenic soils can be directly linked with factors like freezing intensity and time in particular, the continuous fluctuation of weather patterns that fluctuate between warmer and colder temperatures will trigger the development of the soil 4,23,24 .1 The four types of soil specimens were naturally dried or crushed and then sieved (2 millimeters) and the soil samples were used for freeze-thaw cycles test.
The shape and surface shape of grains as revealed in the previous literature offer important details about the origin, the transport, and deposition histories.1 The freeze-thaw test was conducted at -20°C for freezing, and + 20 degC for freezing. However, there are few studies that focus on the morphological properties of the particles that occur during the freeze-thaw process (cryogenic weathering).
We performed preliminary experiments on samples to determine the ideal freeze-thaw period.1 To determine the distinct morphological characteristics that distinguish particles exposed to cryogenic weathering we carried out freeze-thaw experiments on four different soil samples. The time needed for soil samples to be completely frozen and thawed takes 4 hours. It is our hope that this study will uncover the distinct morphological traits of soil’s primary mineral particles that are exposed to the an environment that is cryogenic.1 So the freeze-thaw time is eight hours. Material and techniques.
Utilizing the ring knife (diameter 61. eight millimeters, and 20 millimeters high) to limit the effect in the physical properties of specimens, in order to ensure that the specimens are in the same place and the validity and clarity of the test results.1 Test soil specimens. The prepared specimens were vapour-saturated and sealed both up and down using cling films to preserve the state of closed condition of the system. The test chose loess (L), fine sand (CS) extremely fine sand (VFS) and fine sand (FS) as the testing objects. This study was designed to collect specimens and test after 0, 5, 10 50, and 100 freeze-thaw cycles.1 The physical properties and the distribution of grains of the four soil specimens are displayed in Table 1. Based on the number freeze-thaw cycles (0 5, 10, 50, 100) the total number of six sets of specimens were needed for each kind of soil. Test equipment.
When the specimens were finished and the specimens were ready, the freeze-thaw cycle test chamber could be used to test freeze-thaw cycles to the specimens.1 The freeze-thaw cycles examination of soil samples was performed in the test chamber for freeze-thaw cycles (Fig. 1a). Once the test chamber had reached the desired amount of freeze-thaw cycles required, the specimens were brought out to be tested.
The model for the test chamber for freeze-thaw cycles is ZLHS-250-LS.1 The remaining specimens went through freeze-thaw cycle tests until the freeze-thaw cycles scheduled were complete. The soil sample was saturated using the vacuum pumping saturation method 25 , and the specimens were then sealed with cling films.
After the freeze-thaw and testing, the samples were analyzed and analysed using the particle image processor.1 The temperature test probe within the sample is used to determine if the soil sample is fully frozen and thawed. the temperature of the sample at the time of the test is measured using the temperature probe that is placed in the air. The results of the test, including aspects ratios and the roundness of the specimens were analysed (Table 2.).1 In addition, insulation material is utilized for ensuring that the sample will freeze in a single direction (Fig. 1b).
Analysis and results. Test apparatus: ( a ) Freeze-thaw test instrument; ( b ) Schematic diagram of freeze-thaw tests for soil samples. ( the third ) Particle Image Processor.