FURTHER EVIDENCE RELATING TO THE NEW HYPOTHESIS OF SULPHATE EXPANSION

A RECENTLY PROPOSED MECHANISM OF SULPHATE EXPANSION OF CEMENTS HAS BEEN SUBJECTED TO FURTHER TESTS. ACCORDING TO THE PROPOSED MECHANISM, AN ADDITION OF CALCIUM CARBONATE TO PORTLAND CEMENT SHOULD RESULT IN A BETTER PERFORMANCE IN SULPHATE SOLUTION. TO TEST THIS, A SINGLE BATCH OF PORTLAND CEMENT WAS USED NEAT AND IN TWO 9:1 'CEMENT' MIXTURES MADE FROM CEMENT AND CALCIUM CARBONATE CEMENT AND QUARTZ RESPECTIVELY. A SERIES OF 1:4 'CEMENT': SAND MORTAR PRISMS WAS MADE WITH THE NEAT CEMENT AND WITH EACH OF THE TWO 'CEMENT' MIXTURES. AFTER WATER CURING, THESE PRISMS WERE EXPOSED TO SULPHATE SOLUTIONS, AND THEIR EXPANSION WAS MEASURED. THE RESULTS SHOWED THAT THE MIXTURE OF CALCIUM CARBONATE AND PORTLAND CEMENT PERFORMED BETTER THAN BOTH THE NEAT PORTLAND CEMENT AND THE MIXTURE OF QUARTZ AND PORTLAND CEMENT, THEREBY CORROBORATING THE PROPOSED MECHANISM OF SULPHATE EXPANSION. THE SIGNIFICANCE OF THESE RESULTS FOR OTHER PROPERTIES OF PORTLAND CEMENT IS ALSO DISCUSSED. /AUTHOR/

• Supplemental Notes:
  • Vol 19, No 60, PP 185-189
• Authors:
  • Chatterji, S
  • Jeffery, J W
• Publication Date: 1967-9

Media Info

• Serial:
  • Magazine Concrete Research /UK/

Subject/Index Terms

• TRT Terms: Calcium carbonate; Cement; Expansion; Hypothesis testing; Mixtures; Performance; Portland cement; Quartz; Sulfates
• Uncontrolled Terms: Hypothesis
• Subject Areas: Data and Information Technology; Highways; Materials;

Filing Info

• Accession Number: 00212540
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 24 1994 12:00AM