Introduction: This instrument takes expansive soil, loess, composite clay (cement soil) and other typical soils as the research object, and through systematic indoor tests, grasps the water absorption and expansion process of unsaturated expansive soil, the process of loess collapsibility, and the resistance of the cement soil during the strength growth process The basic law of the rate change, the establishment of a resistivity evaluation system describing structural changes. On this basis, the relationship between macroscopic mechanical property indexes and resistivity indexes is established, and the resistivity indexes are analyzed through the change of unsaturated soil suction. Technical Parameters: 1. Current source: output current: DC0.01-20A continuously adjustable 2. Accuracy: better than ±0.05% 3. Digital voltmeter: 4. Range: 0-199.99mV 5. Degree: 10μA 6. Error: ±(0.004% reading ±0.01% full scale), input impedance: ≥0.3% 7. Measurement error: ≤0.3%, 8. Pitch: 1.59±0.01mm 9. Diameter Φ0.8mm 10. Rate: <0.2% 11. Probe material: cemented carbide (WC) 12. Needle pressure: 3±1N/single needle 13. Power supply: AC 220V±10% 50/60Hz. 14. Power: 12W 15. Use environment: Temperature: 23±2℃ Relative temperature: ≤65%
Introduction: This instrument takes expansive soil, loess, composite clay (cement soil) and other typical soils as the research object, and through systematic indoor tests, grasps the water absorption and expansion process of unsaturated expansive soil, the process of loess collapsibility, and the resistance of the cement soil during the strength growth process The basic law of the rate change, the establishment of a resistivity evaluation system describing structural changes. On this basis, the relationship between macroscopic mechanical property indexes and resistivity indexes is established, and the resistivity indexes are analyzed through the change of unsaturated soil suction.
