Quicklime specification and test methods
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Quicklime specification and test methods

Filetype[PDF-2.06 MB]


  • English
    • Details You May Also Like

    Details:

    • Creators:
    • Corporate Creators:
      Texas. State Dept. of Highways and Public Transportation
    • Subject/TRT Terms:
    • Publication/ Report Number:
      3-J-5-128
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      Texas
    • Corporate Publisher:
      Texas. State Dept. of Highways and Public Transportation
    • Abstract:
      Samples of pebble quicklime were obtained from each of the six major

      lime producers' plants in Texas. These samples were used for laboratory

      testing which determined chemical composition of the dry lime, physical

      properties of slurries prepared from the quicklime, and reaction properties

      of the lime with soil.

      Preparation of slurries with the six materials using the same methods

      and material quantities yielded viscosities ranging from 13 to 165 poises

      at 77 F with solids contents between 28.5 and 32.4 percent solids.

      Adjustment of the high viscosity slurries to the range of 25-30 poises

      resulted in solids contents between 18.5 and 26.0 percent.

      Wet sieve analyses of slurries prepared using two methods were performed.

      Residues retained on the No. 6 and No. 30 screens were weighed. Residues

      on the No. 30 ranged from 5.5 to 32.8 percent using the standard test

      method and 1.2 to 10 percent using a different slurrying method.

      Quicklime/soil mixes were prepared and subsequently compacted into 4 x 6

      cylinders and cured under moist conditions. These cylinders were tested

      at intervals for compressive strength and unreacted lime content. These

      tests showed no consistent difference in the stabilizing performance of

      the different producers' materials. Samples prepared using quicklime

      passing the 1/4-inch sieve and hydrated lime showed more stabilizing

      effect than the coarsely graded quicklime.

      Recommendations for changes to the existing lime specification and test

      procedures are made within this report. It is recommended that the residue

      requirement for the No. 30 sieve be removed and the limit for the No. 6

      sieve be lowered. It is also recommended that a separate grade of quicklime

      be established solely for slurrying purposes which has no limit on

      fines content.

    • Format:
      PDF
    • Funding:
      Project 3J5128
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