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Pages 22-32

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From page 22...
... 22 To supplement the literature review, a survey was developed and distributed online to 28 SHAs identified as having constructed at least one BCOA project. The survey objectives included determining the level of BCOA implementation and obtaining relevant information regarding the design, materials, construction, maintenance and rehabilitation, and performance of BCOAs.
From page 23...
... State of the Practice 23   WA OR CA MT ID NV AZ UT WY CO NM TX OK KS NE SD ND MN IA MO AR LA MS AL GA FL SC TN NC IL WI MI OH IN KY WV VA PA NY ME VT NH NJ DE MD MA CT RI State Respondents Figure 8. SHAs responding to survey on BCOA project construction.
From page 24...
... 24 Evaluation of Bonded Concrete Overlays on Asphalt Pavements WA OR CA MT ID NV AZ UT WY CO NM TX OK KS NE SD ND MN IA MO AR LA MS AL GA FL SC TN NC IL WI MI OH IN KY WV VA PA NY ME VT NH NJ DE MD MA CT RI State Respondents Figure 9. SHAs considering construction of BCOA projects during 2018–2020.
From page 25...
... State of the Practice 25   Design Figure 11 illustrates that the AASHTO Design Guide (1993) and BCOA-ME are the most commonly used structural design methods.
From page 26...
... 26 Evaluation of Bonded Concrete Overlays on Asphalt Pavements Materials Table 12 provides insight into the materials used in BCOA construction. As can be seen, almost half the respondents reported having a specialized paving mixture.
From page 27...
... State of the Practice 27   Maintenance and Repair Techniques Table 13 summarizes the maintenance and repair techniques used to address BCOA distress. Corner breaks and slab cracking are frequently mitigated through slab replacements and crack sealing, joint spalling is often addressed through spall repairs, and joint and crack faulting is often treated through diamond grinding.
From page 28...
... 28 Evaluation of Bonded Concrete Overlays on Asphalt Pavements smoothness, joint and crack faulting, and transverse and longitudinal cracking. Eight agencies reported having an overall condition indicator, and eight conducted FWD testing for each BCOA project.
From page 29...
... State of the Practice 29   In total, the research team received information on 52 BCOA projects from 14 SHAs (Arkansas, Colorado, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Minnesota, Missouri, Montana, Ohio, and Pennsylvania)
From page 30...
... 30 Evaluation of Bonded Concrete Overlays on Asphalt Pavements detailed site evaluations; however, because of traffic control restrictions, one project was removed from the site evaluations. • Region: – North Atlantic: one project (Pennsylvania)
From page 31...
... State of the Practice 31   • The number of BCOA projects constructed over the last six decades has steadily increased, and even more so over the last 30 years. Over the last two decades, 14 of the responding agencies have constructed one to five BCOA projects, five agencies have constructed five to 15 BCOA projects, and one agency has constructed more than 15 BCOA projects.
From page 32...
... NOTE: Four project sites were clustered very closely in Denver, Colorado. Figure 15.

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