Download Constructing Smooth Hot Mix Asphalt (HMA) Pavements by M. Stroup-Gardiner PDF

By M. Stroup-Gardiner

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Additional info for Constructing Smooth Hot Mix Asphalt (HMA) Pavements

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The 95% significance level was used in the ttests. The smoothness variances of the two compared categories were assumed unequal. The t-tests results showthat all Ho hypotheses are rejected. Test (1) is designed to show the effect of road class (interstate or non-interstate) on the contractor's quality of work. At a 95% significant level, in most years, the t-statistics are 36 CONSTRUCTINGSMOOTH HOT MIX ASPHALT significantly greater than the t-critical, showing the smoothness of the projects on the two classes of roads are significantly different.

4 3 O r 2 r~ 1 * Category 1 / Category 3 1 1 0 1993 I I I I I I I 1994 1995 1996 1997 1998 1999 2000 2001 Year Figure 3 - Variability of Average Smoothness among Projects Table 6 - Smoothness Comparison by Contractors Category Contractor No. 16 km) Average (m/km) Standard Deviation 1. 141 3. 095 38 CONSTRUCTINGSMOOTH HOT MIX ASPHALT Cost and Benefit of Pavement Smoothness As a result of the smoothness specification the typical smoothness on Interstate AC pavements has improved approximately 35%.

These methods are intended to stay in place while ALDOT identifies and makes the transition to more reliable and faster technologies, such as laser-based methods, currently available. , et al, "An Automated System for Determination of Pavement Profile lndex and_Location of Bumps for Grinding from the Profilograph Traces", Kansas Department of Transportation, Topeka, KS, 1994. , "Control of Pavement Trueness in Kansas - Interim Report", Bureau of Materials and Research, Kansas Department of Transportation, Topeka, Kansas, 1992.

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