Quicklime specification and test methods

Details

• Creators:
  Price, Robert K. ; Dumas, Charles A.
• Corporate Creators:
  Texas. State Dept. of Highways and Public Transportation
• Subject/TRT Terms:
  Aggregates Calcium Oxide Quicklime
• 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
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:3bed77dd529a9b19f6ce99fd1519fafb2edef9c7ed1323db1fa1bf58b26558c0
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31547/dot_31547_DS1.pdf
• File Type:
  [PDF - 2.06 MB ]