EFFECT OF SULFUR TRIOXIDE CONTENT ON CONCRETE STRUCTURES USING FLORIDA MATERIALS

In this study, several ASTM portland cements were used to address effects of increasing sulfur trioxide (SO3) content of cement on the performance and durability of concrete. The cements were analyzed for their mineralogical content using x-ray diffraction. Several other characterization techniques were used including: calorimetric studies, fineness, quantitative x-ray analysis and oxide chemical composition. The findings indicate that increasing SO3 content increases expansion in lime and sulfate. The amount of expansion experienced by mortar appears to be dependent on the mineralogical composition of cements. Additionally, increasing SO3 content increases strength loss for mortar exposed to sodium sulfate solution. Drying shrinkage measurements indicate that increasing SO3 beyond 3% increases the drying shrinkage for all cements. Concrete strength data indicate that for cements low in alkali and aluminate content, increasing the SO3 to 3.6% increases the strength loss at 180 days. Additionally, deterioration appears to be dependent on tricalcium silicate content of the cement. For cements moderate in tricalcium aluminate and alkalis, increasing tricalcium silicate content rendered cements less tolerant to higher SO3 content. It is recommended that SO3 content should not be allowed to increase above the current specified limits.

• Record URL:
  https://fdotwww.blob.core.windows.net/sitefinity/docs/default-source/research/reports/fdot-bc353-31-rpta.pdf
• 
• Corporate Authors:

  University of South Florida, Tampa

  Department of Civil and Environmental Engineering, 4202 East Fowler Avenue
  Tampa, FL  United States  33620

  Florida Department of Transportation

  605 Suwannee Street
  Tallahassee, FL  United States  32399-0450

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Zayed, A M
  • Brown, K
  • Hanhan, A
• Publication Date: 2004-10

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 93 p.

Subject/Index Terms

• TRT Terms: Alkali; Aluminates; Concrete; Deterioration; Durability; Expansion; Mineralogy; Performance; Portland cement; Shrinkage; Strength of materials; Tricalcium aluminate; Tricalcium silicate; X ray analysis
• Uncontrolled Terms: Sulfur trioxide content
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00989311
• Record Type: Publication
• Report/Paper Numbers: Report No. 0510754,, Final Report
• Contract Numbers: BC-353 RPWO #31
• Files: TRIS, USDOT, STATEDOT
• Created Date: Apr 27 2005 12:00AM