Application of imaging technology to improve the laboratory and field compaction of HMA.
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates

to

Document Data
Library
People
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page

ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
i

Application of imaging technology to improve the laboratory and field compaction of HMA.

Filetype[PDF-3.66 MB]


English
Details You May Also Like

Details:

  • Alternative Title:
    Project title: Using imaging analysis technology to improve the laboratory and field compaction of HMA
  • Creators:
  • Corporate Creators:
    Texas Transportation Institute
  • Corporate Contributors:
    Texas. Dept. of Transportation. Research and Technology Implementation Office
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA/TX-09/0-5261-1
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Texas
  • Edition:
    Technical report; Sept. 2005-May 2008.
  • Corporate Publisher:
    Texas Transportation Institute
  • Abstract:
    Field compaction of asphalt mixtures is an important process that influences performance of asphalt

    pavements. This study evaluates the relationship between different field compaction patterns and the

    uniformity of air void distribution in asphalt pavements. A number of projects with different hot mix asphalt

    (HMA) types were compacted, and cores were taken at different locations from these projects. The X-ray

    Computed Tomography (X-ray CT) system was used to capture the air void distributions in these cores. The

    analysis results have revealed that the uniformity of air void distribution is highly related to the compaction

    pattern and the sequence of using different compaction equipment. More importantly, the efficiency of

    compaction (reducing air voids) at a point was found to be a function of the location of this point with

    respect to the roller compactor width.

    The results in this paper have supported the development of the “Compaction Index (CI),” which

    quantifies the degree of field compaction. The CI is a function of the number of passes at a point and the

    position of the point with respect to the compaction roller width. This index was found to correlate

    reasonably well with percent air voids in the pavement. The CI calculated from field compaction had a good

    relationship with the slope of the compaction curve obtained from the Superpave gyratory compactor. This

    relationship offers the opportunity to predict field compactability based on laboratory measurements. The

    compaction of longitudinal joints was investigated, and recommendations were put forward to improve joint

    compaction. The air void distributions in gyratory specimens were related to the mixture mechanical

    properties measured using the Overlay and Hamburg tests.

  • Format:
    PDF
  • Funding:
    0-5261
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

You May Also Like

Checkout today's featured content at rosap.ntl.bts.gov