Laboratory Summer Gathering
On August 21, after the graduate school entrance exams were mostly over, we held a summer gathering for the lab. To everyone who took the graduate school entrance exams: thank you for all your hard work!
Experimental and Analytical Equipments
Information about the experimental and analytical equipment used in our research has been added to the page below. For some of the devices, we present examples of experimental and analytical methods, as well as sample results (thank you to the lab members who helped making it!).https://kyokawa-lab.web.nitech.ac.jp/en/about-us-2/
Triaxial Compression Testing Appratus (Strain-Controlled Type)
Equipment Name: Triaxial Compression Testing ApparatusManufacturer: Tokyo Shiki Co., Ltd.Features: Strain-controlled axial loading system; compatible with the double vacuum methodApplications: Designed for general soil materials such as sand and clay; evaluation of strength-deformation characteristics under axisymmetric stress conditions in confined, drained, and undrained conditions
Mercury Porosimeter (BELPORE LP/HP)
Equipment Name: Mercury Porosimeter (BELPORE LP/HP)Manufacturer: MICROTRACFeatures: Measures a wide range of pore sizes (3.6 nm to 1 mm) and can analyze pore size distribution, pore volume, porosity, specific surface area, density, and particle size distributionApplications: Analyzes “the size and quantity of pores” within rocks and compacted soil materials
Ozone Generator
Equipment Name: Laboratory Water-Cooled Ozone Generator Labozon 40 (LOG-LC40G)Manufacturer: Eco Design Co., Ltd.Features: Generates up to 40 g/h of ozone at a concentration of 200 g/m³ or higher. The discharge tube is cooled using cooling water, enabling stable ozone generation.Applications: Used to promote the oxidation of geomaterials such as rocks.
Thermogravimetric Analysis & Humidity Control System
Equipment Name: High-Sensitivity Differential Thermal Analysis Balance (STA 2500 Regulus), Water Vapor Generator (HC 9700)Manufacturer: NETZSCHFeatures: Detects minute weight changes with a TG resolution of 0.03 µg; capable of controlling humidity conditions from 5% to 90% RHApplications: Used to investigate how the weight and properties of materials change due to humidity and water vapor. Used […]
Ion Chromatography
Equipment Name: Ion Chromatography (Eco IC)Manufacturer: MetrohmFeatures: Analyzes concentrations of anions, cations, and organic acidsApplications: Qualitative and quantitative analysis of ionic components adsorbed to pore water and the surfaces of soil materials (after desorption)
Particle Size Distribution Measurement Device
Equipment Name: Particle Size Distribution Analyzer (SALD-3100)Manufacturer: Shimadzu CorporationFeatures: Measures the particle size distribution of a sample by irradiating it with a laser and analyzing the diffraction and scattering patternsApplications: Particle size analysis of granular samples such as sand and clay
Soil Water Potential Measuring Device
Equipment Name: Soil Water Potential Measuring Device (WP4C)Manufacturer: METERFeatures: Chilled-mirror dew point method; supports water potentials from 0 to −300 MPaApplications: Analysis of water retention properties (suction-saturation relationship) in clay, compacted soil, rock, and other materials
Pre-treatment equipment, post-treatment equipment
Centrifuge: LCX-200（TOMY） Ultrapure Water Production System: RFU424BC（ADVANTEC TOYO） Vacuum-Sealing Machine: V-392（TOSPACK） Freeze Dryer: DRW240DA（ADVANTEC TOYO）