선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- The powder method is used to identify the substances of interest, qualitative analysis of minerals, analysis of phase changes according to temperature or pressure, changes in textures, and quantification of mineral contents when multiple substances are mixed. In this study, the powder method was used for obtain both qualitative and quantitative analyses.
- Modal, XRD, and XRF analysis, along with physical property tests, particle size distribution tests, and slake durability tests were carried out to determine the physical and chemical weathering properties of the biotite granite and granitic weathered soil in the study area. The samples were pre-treated by molding, powdering, or other methods, depending on the sample types (FR, MW, HW, RS-1, and RS-2), prior to testing or analysis.
- To determine the physical and chemical properties of biotite granite and granitic weathered soils from the Gyeongju area, field investigations were first carried out. The rock and weathered soil samples collected from the study area were analyzed by modal analysis, XRD, XRF, physical property tests, and slake durability tests. According to the results of the field investigations, traces of rill erosion were commonly observed on those slope faces composed of granitic weathered soil, and fine-grained material had been washed away and deposited at the bottom of the slope faces.
- To determine the physical properties of the granite and granitic weathered soils in the study area, laboratory tests were conducted on samples RS-1 and RS-2 by applying the ASTM (ASTM D 2216-10) method to measure water contents in the soils, and the soil specific gravity test (ASTM D854-10). These physical property tests were conducted on six samples (three from RS-1 and three from RS-2) to determine the dry unit weights, specific gravity, water contents, and porosity (Table 4).
- To determine the physical properties of the granite and granitic weathered soils in the study area, laboratory tests were conducted on samples RS-1 and RS-2 by applying the ASTM (ASTM D 2216-10) method to measure water contents in the soils, and the soil specific gravity test (ASTM D854-10). These physical property tests were conducted on six samples (three from RS-1 and three from RS-2) to determine the dry unit weights, specific gravity, water contents, and porosity (Table 4).
대상 데이터
- Fresh (FR), moderately weathered (MW), and highly weathered (HW) samples, as assessed by visual observation, were collected to identify the weathering properties of biotite granite in the Gyeongju area. The FR samples were collected from drill cores of a single rock mass at a distance of ~8 km from the study area while the MW and HW samples were collected from drill cores taken within the study area (Fig. 1). The soil samples RS-1 and RS-2 represent the residual soil (RS) and were collected using a ring sampler from slope faces in the study.
- The XRF instrument was set up with an RhKα X-ray target, and the an element analysis range from No. 4 Beryllium to No. 92 Uranium.
- The geology of the study area consists of Cetaceous biotite granite, black shale and red shale, and Quaternary alluvial deposits in valleys (Fig. 1). Shales of the Cretaceous Silla Group form the bedrocks, and consist of layers of black shale, red shale, hornfels, and sandstone.
이론/모형
- 02° in the range of 5° to 65°. Quantitative analysis utilizing the XRD results was conducted using a Siroquant program for the quantitatively calculation of minerals using the full analysis pattern.
- The degree of wear caused during the test is expressed as follows: (mass after test/mass before test) × 100 (%). Slake durability tests were carried out using the ASTM D 4644-04 test method. The samples were molded into a spherical shape, the mass of each sample was in the range of 40 to 60 g, and the total mass was distributed in the range of 450 to 550 g.
- Particle size distribution analyses were carried out to classify the granitic weathered soils according to the Unified Soil Classification System (USCS) and to determine the particle size distribution and the component ratios of gravels, sand, and silt/clay. This analysis was conducted using the sieve-analysis test (ASTM D422-63).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.