Development of a Type I (PM) Cement

Details

• Creators:
  Ramakrishnan, V.
• 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:
  SD91-11-F
• Resource Type:
  Tech Report
• Geographical Coverage:
  South Dakota ; United States
• Edition:
  Final Report
• Corporate Publisher:
  South Dakota. Department of Transportation
• Abstract:
  Alkali-silica reactivity (ASR) produces a major problem in concrete structures. This report presents an experimental investigation to identify a natural pozzolan and to determine the optimum quantity that can be blended with cement to produce a Type I (PM) cement for inhibiting the ASR. For comparative evaluation a Class F fly ash has also been investigated along with the pozzolans. Two methods, ASTM P214 and C227 were adopted for assessing the effectiveness of the pozzolans in controlling the ASR. Three percentages of 10%, 20% and 30% replacements of cement with fly ash were investigated. A total of 30 natural pozzolans were collected from the selected sites. Their chemical and mineralogical compositions and some physical properties, such as fineness and density, were determined. The strength activity test (ASTM C311) was used in eliminating the pozzolans that would adversely affect the strength of concrete. Based on this test, ten pozzolans were selected for detailed study. The ASR expansions measured using the ASTM P214 test method had shown that two pozzolans were more effective than the Class F fly ash in inhibiting the ASR expansion. This report also presents an extensive experimental investigation to evaluate the performance characteristics and physical properties of the selected natural pozzolan blended cements, cement mortars and cement concretes. There was no significant difference in the physical properties of pozzolan blended cements, cement mortars and cement concretes when compared with those of corresponding unblended cements, mortars and concretes. It is economically feasible to mine the selected pozzolans from the volcanic ash beds within the Lakota Formation. The most favorable deposit is located about 10 miles (16 km) from the cement plant at Rapid City.
• Format:
  PDF
• Funding:
  310066
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:cb51b52fc38a8558506e5bc2648a0e1102a538288884337da78c644e71c171adb015e6f0ed21dab2cf9f0a2c6670e796ca14429ea115542eb83ecfbf5e76e268
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/80079/dot_80079_DS1.pdf
• File Type:
  [PDF - 4.96 MB ]