By M. Stroup-Gardiner
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Extra resources for Constructing Smooth Hot Mix Asphalt (HMA) Pavements
Example text
It should be noted that both RSEs were calibrated on the same bench by the same crew prior to the field inspection. The percentage difference between the two RSEs, calculated as the difference between the RSE readings divided by RSE II readings, ranges from 0% (no difference) to 1300% (the difference is 13 times the value of the RSE II measurement). Comparisons between the RSE I and RSE II measurements and the %DL simulated from the KJ Law Light and the ICC Light indicated that the differences between the RSE measurements and those of the lightweight profilers are significant and not consistent, except for ICC Light and RSE I.
Several analyses were performed on the collected data, which include preliminary analysis, RSE simulation, statistical analysis, speed effect analysis and correlation analysis. 048 m) straightedge over the profile and calculating the deviation at the mid-point of the straightedge. The statistical analyses were performed to investigate the equipment repeatability and the differences among de~ices, including the two RSEs. Three correlation analysis studies were performed to correlate the RSE measurements with the results of the simulation analysis, to correlate IRI measured with different devices and to correlate the 1RI and % defective length.
Null Hypothesis: No significant difference among devices for all test sections. Type of Measurements: Summary measurements. Statistical Test: F-Test with a 90% confidence level. Cases Analyzed: Analysis was performed on the %DL for the average of the rtms of ICC Light, KJ Law Light, ARAN (including ARAN40, ARAN50 and ARAN60), KJ Law Full, RSE I and RSE II. Results: The analysis results indicate that the null hypothesis of no difference among devices is rejected. ZAGHLOUL AND VITILLO ON NJDOT ROLLING STRAIGHTEDGES 49 Evaluate the Significance of Difference Between Pairs of Devices Purpose: To evaluate the significant of the difference between pairs o f devices by comparing the average %DL o f different pairs of devices for all sections.
