Welcome to ROSA P | Evaluation of cement and fly ash treated recycled asphalt pavement and aggregates for base construction. - 23569 | US Transportation Collection
Stacks Logo
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.
 
 
Help
Clear All Simple Search
Advanced Search
Evaluation of cement and fly ash treated recycled asphalt pavement and aggregates for base construction.
  • Published Date:
    2011-12-01
  • Language:
    English
Filetype[PDF-2.62 MB]


Details:
  • Publication/ Report Number:
    FHWA/LA.11/481
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    794457821
  • Edition:
    Final report; Mar. 2009-Mar. 2011.
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Soils and Geology ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance ;
  • Format:
  • Abstract:
    Many entities currently use recycled asphalt pavement (RAP) and other aggregates as base material, temporary haul roads,

    and, in the case of RAP, hot mix asphalt construction. Several states currently allow the use of RAP combined with cement

    for a stabilized base course under both asphalt and concrete pavements. Currently, there is disagreement on what properties

    are required, and how to test the cement and fly ash treated RAP for both asphalt and concrete pavement structures.

    The objective of this study was to determine feasibility of cement and fly ash treated RAP and other aggregates as a

    structural layer for both portland cement concrete and hot mix asphalt pavement systems. A 610 limestone from Kentucky

    was used as the reference material. Other materials used in the study include: Mexican 610 limestone, gravel and limestone

    based RAP, and blended calcium sulfate (BCS). Samples were prepared with three cement and fly ash contents and tested

    for compression and flexural strength. Length changes specimens were also produced and the resilient modulus was

    measured.

    Mixtures achieving 150 and 300 psi are capable of being produced with 4 to 8 percent portland cement and 10 to 20 percent

    class C fly ash. The compacted specimens achieved equal to or up to two and a half times greater compressive strength than

    those samples that were uncompacted. The reference and Mexican 610 limestone’s produced much higher strengths

    compared to the RAP BCS mixtures. The BCS mixtures proved adequate in terms of shrinkage, strength, and did not fall

    apart when stored in the 100 percent humidity room or underwater for the requisite 14-day cure period for the length change

    test.

    The resilient modulus results were similar across all samples, but no discernible trend could be determined, most likely due

    to the test containing only one sample for analysis. The results show that cement and fly ash treated RAP and other

    materials can be used in base course construction.

  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like:
Submit Feedback >