Pavement Patching Practices (2014) / Chapter Skim
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Pages 12-23
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12 This chapter summarizes the findings of the literature review regarding pavement patching practices for asphalt and concrete pavement surfaces. The literature review is presented in three parts: (1)
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13 be justified. When performed properly and at the appropriate time, patching need not be a temporary fix, but can be an important component of a pavement management system, provided good quality materials and installation techniques are used.
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14 PATCHING ASPHALT PAVEMENT SURFACES This section summarizes the findings of the literature review related to patching pavements surfaced with asphalt mixtures. The results are presented in the categories of Materials and Testing, Techniques and Equipment, and Performance, which includes some discussion of cost-effectiveness.
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15 blade resistance test did not provide any meaningful results and the rolling sieve test did not correlate with field performance (32)
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16 Although FHWA considers spray patches temporary (10) , some states consider the patches almost as good as semipermanent patches (see the survey results in chapter three)
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17 common terms used in this table were defined by Prowell and Franklin (50) as follows: • Bleeding or flushing -- excess asphalt at the surface of the patch.
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18 Under the conditions in this study, spray injection was not found to be cost-effective (51)
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19 new guidelines for laboratory testing and material placement techniques to enable appropriate material use and field construction practices (59)
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20 was that while many ready-mix producers exclusively made use of blended cements in construction, Iowa DOT specifications did not permit its use in patching operations because of their assumed slow strength gain. (Iowa DOT patching specifications required opening at 5 hours on 2-lane or 10 hours on 4-lane pavements.)
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21 in Table 7. However, the selection of an appropriate material for a particular repair job is challenging as these materials possess a range of physical and mechanical properties and definitive criteria for establishing the compatibility between repair materials and substrate concrete are not adequately defined.
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22 By using milling equipment and durable concrete mixtures, these states have successfully demonstrated the use of PDRs in pavements where deteriorated areas extend from one-third to one-half the slab depth. As a result, today partial-depth repairs are used for more joint repairs and at less cost than traditional full-depth repairs (67)
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23 asphalt concrete. As long as safety and ride quality are not compromised; asphalt concrete patching was proposed by the authors as an appropriate temporary measure to prevent further moisture penetration and performance defects (69)
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