Mechanics of unsaturated granular media

Abstract

42 3.6 Conclusions 43 4. MOISTURE-PRESSURE RELATIONS IN SAND: EXPERIMENTAL RESULTS 44 4.1 Introduction 44 4.1.1 Background 44 4.2 The moisture characteristic curve 47 4.3 Measurement techniques 53 4.4 Experimental procedure 58 4.4.1 Sample preparation 58 4.4.2 Pressure measurement 58 iii 4.4.3 Density and moisture content measurements. . 59 4.4.4 Measurement precision and accuracy 61 4.5 Curve fitting technique and results 63 4.5.1 Analysis of the parameters a, n, and m. .. . 64 4.6 Experimental results and discussion 66