In-Place Density of Asphalt Pavements: Case Study during Cold Weather Paving

Late-season paving is common and often performed in colder temperatures, which is the most challenging environment for attaining optimal in-place density and compaction. The in-place density of asphalt pavement greatly affects the life span of the pavement. This case study aims to evaluate and compare the effectiveness of different compaction, delivery, and mix design characteristics to ensure the optimization of in-place asphalt pavement density. To this end, four test sections were constructed over four separate days of paving during cold weather conditions. The in-place density was measured using four methods: (1) conventional or traditional cut roadway cores, (2) combination of infrared continuous thermal scanning (ICTS) with conventional or traditional cut roadway cores, (3) nonnuclear density gauge (NNDG), and (4) rolling density meter (RDM) utilizing ground-penetrating radar (GPR). The results revealed that during cold weather paving, the material transfer vehicles (MTVs) provide an effective method to minimize thermal segregation and therefore provide improved temperature and density consistency. In addition, the combination roller provided a consistent improvement compared to the standard three double-drum steel roller compaction method. It was shown that ICTS is an effective measuring technique, especially for paving in cold weather conditions, since it provides real-time information to the producer for improving temperature consistency that will result in more uniform densities. The use of nondestructive testing equipment can also strengthen the acceptance procedure in a more rigorous way by increasing the testing frequency.

Language

  • English

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Filing Info

  • Accession Number: 01723135
  • Record Type: Publication
  • Files: TRIS, ASCE
  • Created Date: Nov 20 2019 9:48AM