Abstract
The central theme of this study is to identify strength-stiffness correlations for chemically treated subgrade soils in Indiana. This was done by conducting Unconfined Compression (UC) Tests and Resilient Modulus Tests for soils collected at three different sites—US-31, SR-37, and I-65. At each site, soil samples were obtained from 11 locations at 30 ft spacing. The soils were treated in the laboratory with cement, using the same proportions used for construction, and cured for 7 and 28 days before testing. Results from the UC tests were compared with the resilient modulus results that were available. No direct correlation was found between resilient modulus and UCS parameters for the soils investigated in this study. A brief statistical analysis of the results was conducted, and a simple linear regression model involving the soil characteristics (plasticity index, optimum moisture content and maximum dry density) along with UCS and resilient modulus parameters was proposed.
Keywords
resilient modulus, FWD, UCS, treated subgrade
Report Number
FHWA/IN/JTRP-2022/20
SPR Number
4420
Sponsoring Organization
Indiana Department of Transportation
Performing Organization
Joint Transportation Research Program
Publisher Place
West Lafayette, IN
Date of Version
2022
DOI
10.5703/1288284317383
Recommended Citation
Shivakumar, P., Gupta, K., Bobet, A., Shin, B., & Becker, P. J. (2022). Estimating strength from stiffness for chemically treated soils (Joint Transportation Research Program Publication No. FHWA/IN/JTRP-2022/20). West Lafayette, IN: Purdue University. https://doi.org/10.5703/1288284317383