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Title:

Evaluation of Effect of Chemical Admixtures on the Performance of Cement-Stabilized Materials in Cold Weather

Accession Number:

01629814

Record Type:

Component

Abstract:

The application of cement stabilized materials (CSM) in cold weather is prohibited by many federal and state agencies, as low temperatures can mitigate the cement hydration efficacy and retard the strength and stiffness growth of CSM. Due to the similarities between concrete and CSM, chemical admixtures that make concrete achieve full service capabilities under extreme conditions are quite likely to be successful in soil stabilization. This study evaluated the effect of four types of promising admixtures on the freezing point (FP) and strength development of CSM under cold temperature. The laboratory results indicated that all the admixtures made the FP values decrease with dosage increase, and the optimum dosages existed on three admixtures, which could provide the peak unconfined compressive strength (UCS). AC122 and AC534 were more effective on reducing the FP values, thus they were combined together at various percentages and used in CSM mixtures for FP and UCS tests. The results showed that the FP values decreased more from the admixture combinations than the superposition of individual admixtures. Using the measured FP data, a model was developed to predict the FP decrease at different admixture dosages. The UCS of CSM with different admixture combinations did not change significantly after 7-day curing at 35°F. In addition, for the CSM with different admixture dosages cured at the temperatures slightly above the FP, the UCS values were close to each other when the curing temperature was identical, and decreasing the curing temperature reduced the UCS.

Supplemental Notes:

This paper was sponsored by TRB committee AFS80 Standing Committee on Stabilization of Geomaterials and Recycled Materials. Alternate title: The Evaluation of Chemical Admixtures on the Performance of Cement Stabilized Materials in Cold Weather.

Monograph Accession #:

01618707

Report/Paper Numbers:

17-05989

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Wang, Jingan
Fayish, Aaron C
Hoffheins, Brian
McCahan, Matthew L

Pagination:

15p

Publication Date:

2017

Conference:

Transportation Research Board 96th Annual Meeting

Location: Washington DC, United States
Date: 2017-1-8 to 2017-1-12
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2017 Paper #17-05989

Files:

TRIS, TRB, ATRI

Created Date:

Dec 8 2016 12:24PM