Support for the Implementation of a Longitudinal Joint Density Specification for Hot-Mix Asphalt Concrete

摘要

Research project 0-1757 assessed the density of the longitudinal construction joint of many pavements in Texas and identified that a significant joint density problem existed, which justified the implementation of a joint density specification. This specification is now included as part of the Standard Specifications for Item 341 (Dense-Graded Hot-Mix Asphalt). To facilitate the implementation of the research and specification, the following objectives were included in this implementation project: (1) identify the most promising construction techniques aimed at achieving longitudinal joint density; (2) develop and conduct training seminars for the districts on construction of longitudinal joints and on the new TxDOT testing and specification requirements; (3) acquire non-nuclear density gauges; and (4) evaluate current longitudinal joint density criteria and the ability of contractors to meet the criteria.