Best Practices for Crack Treatments for Asphalt Pavements (2014) / Chapter Skim
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Pages 14-21
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14 C H A P T E R 3 Summary of the Survey Results Scope of Work A survey of crack sealing and crack filling procedures was developed, distributed, and analyzed. The survey was sent to state department of transportation (DOT)
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15 The details of the specifications will be discussed in a later section. Almost 90% of the respondents indicated there are some conditions for which crack sealing or crack filling is not appropriate.
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16 It is noteworthy that the first three issues in both lists in Table 3-2 are the same and in the same order. Sixty-seven percent of the respondents listed the first three as the primary problem, and 58% of the respondents listed the first three as the most common problem.
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17 presents the percentage of responses for each issue. From this information, it is apparent that respondents pay more attention to climatic conditions for crack sealing than for crack filling.
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18 filling, 64% of the respondents indicated that their organization had an approved list of materials. As is often the case, most local agencies reference the state DOT specifications.
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19 Forty-three percent of respondents always use an overband crack seal configuration (with an additional 8% using it most of the time) , while 28% never use this configuration.
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20 For sealant placed prior to an asphalt overlay, 54% of the participants indicated that no changes were made to crack sealing/filling operations. The time to complete crack treatments prior to overlay varied from one to three years, with a one-year wait being a common response.
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From page 21... ...
21 Eighty-one percent of the participants indicated that deicer applications do not affect sealant performance. The only situation in which deicer was noted to have an impact on sealant performance is if the sealant is applied shortly after a deicer application.
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