Development of a Type I (PM) Cement – Supplementary Report 1 — Investigation of Locally Available Natural Pozzolans

Details

• Creators:
  Rahn, Perry H ; Holm, Ronald A
• Corporate Creators:
  South Dakota School of Mines and Technology
• Corporate Contributors:
  South Dakota. Department of Transportation. Office of Research
• Subject/TRT Terms:
  • Accelerated tests
  • Alkali silica reactions
  • Control
  • Economic factors
  • Economic impacts
  • Fly ash
  • Measures of effectiveness
  • Pozzolan
• Publication/ Report Number:
  SD91-l l -F
• Resource Type:
  Tech Report
• Geographical Coverage:
  South Dakota ; United States
• Edition:
  Supplementary Report 1
• Contracting Officer:
  Johnston, Dan
• Corporate Publisher:
  South Dakota. Department of Transportation
• Abstract:
  A reconnaissance survey of potential sources of pozzolans within 100 miles of Rapid City resulted in the selection of 26 sites. Most of these sites are volcanic tuffs of shales. Pozzolanic activity index data show that the Pierre Shale, "fire clay" from the Lakota Formation and the Rockyford Ash are the most suitable. A detailed geologic description indicates that the most favorable units are volcanic ash beds typically mixed with fine-grained terrestrial sediments. Chemical analyses on 9 samples by ICP spectroscopy and the scanning electron microscope indicate that silica is high, ranging from :6 to 80%, and sodium and potassium are low. A mineralogical study by x-ray diffraction show that the predominant minerals are quartz and clay. The Rockyford Ash surprisingly showed 50% of the zeolite mineral clinoptilolite. Expansion tests show that the Rockyford Ash, Lakota fire clay, and Pierre Shale have the most promising pozzolanic qualities.
• Format:
  PDF
• Funding:
  310066
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/80080/dot_80080_DS1.pdf
• File Type:
  [PDF - 5.05 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:830a3de9916461582cd5bfed80ee6f81bd4ecfc94f75a20b80d6c10364e4ed9f4ba67ff360d590468382ad941d5e7c7246f0368e3165d16a1c54f72539cdc8a1