Permeability Test Results With Packed Spheres and Non-Plastic Soils

摘要: This paper examines permeability test results with packed spheres and non-plastic soils. Most tests on were performed in physics chemistry, using liquids or gases to measure the intrinsic permeability, K (m2). All (m2) converted into saturated hydraulic conductivity ksat (m/s). Equal having a unimodal multimodal grain size distribution curve (GSDC) tested. We point out interesting differences between approaches physics, geotechnique, hydrogeology, then discuss difficulties testing methods, before analyzing all data. propose method fit GSDC either single, sum of lognormal equations, which gives closed-form expression for specific surface. Then, we assess performance predictive methods ksat, including Kozeny–Carman equation. A few use only mean particle size, are shown give excellent predictions equal packings. Other effective d10 void ratio e, also soils, ranges they initially developed. new equation is proposed, successfully predicts range from 1 10−10 m/s, when parameter [d102 e3/(1+e)] varies 10−9 102 mm2, natural