01629811

Component

Shrinkage cracking of the cementitiously stabilized layers (CSL) causes distress to pavement structure and influences its service life. Shrinkage of CSL can be categorized into free drying shrinkage, autogenous shrinkage, and thermal shrinkage. This study developed new test methods to identity the shrinkage properties of cementitiously stabilized materials (CSM), including free drying shrinkage, autogenous shrinkage, and coefficient of thermal expansion (COTE). The test methods were first evaluated in the laboratory on both heavily and lightly stabilized materials and were found to be effective. Results also showed that autogenous shrinkage strain is small compared with drying and thermal ones. In addition, free drying shrinkage and COTE tests were conducted on other types of CSM under various environmental conditions. The results of the drying shrinkage tests, which considered the influence of temperature and humidity, were used to develop a shrinkage strain model. The new model is shown to predict well the drying shrinkage strain of early-age CSM.

This paper was sponsored by TRB committee AFS80 Standing Committee on Stabilization of Geomaterials and Recycled Materials. Alternate title: The Development of Test Methods to Identify the Shrinkage Properties of Cementitiously Stabilized Materials.

01618707

17-05720

English

20p

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Figures; Photos; References; Tables

Cement; Mathematical models; Shrinkage; Stabilized materials; Test procedures

Autogenous shrinkage; Coefficient of thermal expansion

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2017 Paper #17-05720

TRIS, TRB, ATRI

Dec 8 2016 12:17PM