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The variability of the indirect tensile stripping test.
The purpose of this investigation was to determine the variability of the Virginia Department of Transportation's (VDOT) indirect tensile stripping test. Five contractor labs and eight VDOT labs participated in the study. Each lab performed three replicate tests on each of two mixes, one containing hydrated lime and one containing chemical antistripping additive. The standard deviation was 3.5 percent for within-lab results and 6.1 percent for between-lab results. Lack of significant correlations between strength and voids total mix indicated that a strength correction procedure for voids is not necessary. Examination of the VDOT specification indicates that contractors need to maintain the average TSR of the alternative mix containing chemical additive at least two standard deviations above the minimum value to ensure that single tests do not fail.
The subject report describes a follow-up evaluation of test sections that were installed in 1982 and 1983 and reported on in 1987. Each test section c...
The purpose of this investigation is to evaluate the effectiveness of hydrated lime as an antistripping additive in several test sections. The two sec...
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