Resin Modified Pavement Demonstration Project.pdf
Resin Modified Pavement Demonstration Project.pdf
Resin Modified Pavement Demonstration Project.pdf
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Chapter 7 – ConclusionsUsing construction, performance, and cost data from these test sections; a head to headcomparison of each paving method can be made in order to assist the MississippiDepartment of Transportation in developing a paving strategy for highly traffickedintersections. For the comparison, each paving method will be ranked in severalcategories. The best paving option for each category will be given a value of 1, the nextbest will be given a 2, and the least desirable option will be given a 3. Once all categoriesare ranked, the pavement options will be totaled with the lowest total being ranked thebest option. These comparisons and results can be seen below in Table 1.CategoryEase ofConstructionTable 1- Comparison of paving methodsUltra-Thin <strong>Resin</strong> <strong>Modified</strong>Whitetopping <strong>Pavement</strong>PG 82-222 3 1Skid Resistance 1 3 2Rutting 2 1 3IRI 3 2 1PCR 3 2 1Cost 2 3 1Total 13 14 9The comparison above shows the PG 82-22 to be the best option. That result is supportedby the information gathered throughout this study.One issue affecting the PG 82-22 was rutting near the end of the study. This is an issuewith all asphalt pavements; however improvements continue to be made in Superpavemix designs to alleviate rutting. Also, the PG 82-22 section was constructed at about onethird of the cost of the other test sections, meaning the Ultra-Thin Whitetopping and the<strong>Resin</strong> <strong>Modified</strong> test sections would need to have three times the service life to accountfor the difference in cost. That was certainly not the case with the Ultra-ThinWhitetopping as it was removed and replaced in 2007 due to excessive failures.The <strong>Resin</strong> <strong>Modified</strong> pavement sections held up throughout the study, however thecomplexity and attention to detail in construction needed for this pavement to performsuccessfully makes it a less appealing option. This was evident because even in thecontrolled environment provided by this study, construction problems occurred with thecapping of grout before it fully penetrated the mat.36