THE GRAVIMETRIC DETERMINATION OF STRONTIUM OXIDE IN PORTLAND CEMENT

METHODS WERE STUDIED FOR THE GRAVIMETRIC DETERMINATION OF THE STRONTIUM CONTENT OF PORTLAND CEMENT. THE ONE SELECTED WAS DEVELOPED BY MODIFYING AN EXISTING METHOD SO AS TO PERMIT THE DETERMINATION OF THE SMALL AMOUNTS OF STRONTIUM PRESENT IN CEMENT. THE METHOD IS BASED ON THE SOLUBILITY OF CALCIUM NITRATE AND THE INSOLUBILITY OF STRONTIUM NITRATE IN 80 PERCENT NITRIC ACID. THE ACCURACY OF THE PROCEDURE WAS DEMONSTRATED BY ANALYZING SAMPLES OF KNOWN LOW STRONTIUM CONTENT. CALCIUM DID NOT APPEAR TO INTERFERE WITH THE ANALYSES. ANALYSES OF 30 CEMENTS GRAVIMETRICALLY AND FLAME PHOTOMETRICALLY SHOWED RESULTS AVERAGING 0.02 PERCENTAGE POINTS HIGHER BY THE LATTER METHOD. ALTHOUGH THE GRAVIMETRIC METHOD IS THE SLOWER OF THE TWO, IT GIVES GOOD ACCURACY AND DOES NOT REQUIRE COSTLY APPARATUS. /PCA/

• Authors:
  • Ford, C L
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Calcium compounds; Flame photometry; Gravimetric analysis; Nitrates; Nitric acid; Oxides; Portland cement; Solubility
• Old TRIS Terms: Gravimetric analyses; Strontium compounds
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213554
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 112
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM