Work

Influence of suction stress on the resilient modulus model for unsaturated aggregate base

Year: 2025

Type: article

Abstract: The resilient modulus of the aggregate base material is crucial in mechanical pavement design. The resilient modulus is affected not only by the stress state but also by the moisture state, which must be considered during modeling to properly estimate the resilient modulus. Regarding the moisture state, the suction stress as a stress state variable accounts for the effect of suction and saturation can be incorporated into the resilient modulus model. In this study, the effect of suction stress on the resilient modulus was investigated, and the behavior of suction stress was considered based on the concept of average skeletal stress and independent stress state variables to estimate the resilient modulus. The results revealed that the established model appropriately estimates the resilient modulus of the aggregate base materials and that suction stress affects the resilient modulus independently.

Source: Transportation Engineering

DOI: 10.1016/j.treng.2025.100336

Authors: Hyun-Su Park, Byeong-Su Kim, Seong-Wan Park

Institution: Dankook University

Language: English

Topic: Soil and Unsaturated Flow

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,670

Funder: National Research Foundation of Korea