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- W2248134037 abstract "The Indiana Department of Highways (IDOH) has been undersealing concrete pavements with bituminous materials since the late 1940s. Most early rigid pavements were constructed directly on soil subgrades and were subject to severe pumping. Thus early undersealing operations involved treating entire sections of roadway. As pavement designs improved, severe pumping became less prevalent and a method of identifying only those areas that required undersealing became necessary. The approach taken by IDOH personnel was global in nature. Because it was impractical to locate and treat specific voids, a method was developed to identify and treat the most severely distressed areas. The method of void detection presented herein uses Dynaflect deflections measured at regular (100-ft) intervals within each contract section. Decision criteria based on midslab deflections are established for each contract; Sensor 5 is the primary indicator variable. Because decision criteria are obtained independently for each contract section, the method is applicable to both jointed and continuously reinforced concrete sections and to previously overlaid sections. When the areas that require undersealing have been identified, all cracks and joints within each area are treated. The procedure involves carefully monitoring slab motion during material injection with a sensitive deflection gauge developed specifically for that purpose. Furthermore, injection time limits are observed to minimize material losses due to blowouts. Data are presented that demonstrate both the validity of the void detection method and the joint deflection improvements that can be expected from the undersealing procedure. The economic feasibility of the method is discussed in terms of the savings that have been realized since the implementation of the method." @default.
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- W2248134037 date "1987-01-01" @default.
- W2248134037 modified "2023-09-26" @default.
- W2248134037 title "VOID DETECTION AND RIGID PAVEMENT UNDERSEALING IN INDIANA: A COMPREHENSIVE APPROACH" @default.
- W2248134037 hasPublicationYear "1987" @default.
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