Measurement and Evaluation of Subgrade Soil Parameters

Résumé du livre

A key material property used in the mechanistic-empirical pavement design guide (MEPDG) is the resilient modulus (M sub r), which either can be obtained from experimental testing or can be backcalculated from other measured soil properties. The determination of a representative M sub r value for a given subgrade, considering seasonal variations and testing intricacies, is not an easy or straightforward task. Over 30 different correlation equations were reviewed in this study. Selected equations were further examined using data from two Montana Department of Transportation (MDT) soil survey reports. Results from the literature review and preliminary data evaluation indicate there is little to no consistency between equations for predicting M sub r from soil index and classification properties.