Effect of moisture content of cohesive subgrade soil

Adnan Zainorabidin,Dian Hastari Agustina,P Hajek,W.T Chan,A.L Han,B.S Gan,M.B Ismail,B.A Hidayat,R Sriravindrarajah,S Kristiawan

doi:10.1051/matecconf/201819503010

Adnan Zainorabidin, Dian Hastari Agustina + Show 8 more

Open Access

https://doi.org/10.1051/matecconf/201819503010

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Abstract

A good subgrade for road pavement is required to support the traffic load that passes through. The characteristics of the subgrade is determined by the stress-strain behaviour that is expressed as a resilient modulus. The performance of the pavement is affected by characteristics of the subgrade. Characteristics of clay soil generally have a low of bearing capacity, especially to support the load induced by the wheel load of vehicles. Clay soil is very sensitive to changes of temperature and moisture content. The changes of moisture content cause the changes on the subgrade‚s resilient modulus value. This paper studies the resilient modulus of the subgrade of clay soil by laboratory testing. To investigate the effect of moisture content, this testing is done on a dry side, OMC condition and wet side. The result shows the difference of the resilient modulus characteristic and deformation that is influenced by the moisture content.

Highlights

Subgrade is a very important layer in pavement design
The objective of this study is to show the effect of various moisture contents on the resilient modulus of cohesive subgrade soil
Resilient modulus of subgrade is one of the key material properties that is required for pavement design and analysis

Summary

Introduction

Subgrade is a very important layer in pavement design. Subgrade soil that is designed to support the pavement structure can be provided by natural soil, embankment soil and cut or fill soil [1, 2]. The characteristics of a subgrade material must have the engineering requirements of properties such as stiffness and strength. Resilient modulus is the important value to characterize subgrade soil for pavement design. Several researchers have studied the influences of moisture content on subgrade resilient modulus [3,4,5,6,7,8]. Moisture content of subgrade soils is one of the important variables to predict the resilient modulus (MR) value [9]. The objective of this study is to show the effect of various moisture contents on the resilient modulus of cohesive subgrade soil

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Conclusion