CONCRETE AGGREGATES --CHEMICAL REACTIONS

THE PAPER REVIEWS METHODS OF TESTS FOR AGGREGATES TO DETERMINE THEIR POTENTIALITIES OF PRODUCING DELETERIOUS CHEMICAL REACTIONS IN CONCRETE. THESE INCLUDE: THE MORTAR BAR (ASTM C 227), PETROGRAPHIC EXAMINATION ASTM C 295), CHEMICAL TESTS (ASTM C 289), POTENTIAL VOLUME CHANGE METHOD OF CONROW AND THAT OF ASTM C 342, WETTING AND DRYING TESTS, AND THE MASON JAR TEST. SOME OF THESE TESTS CAN BE USED ALSO FOR THE STUDY OF REACTIVE SILICEOUS ADMIXTURES OR OTHER INHIBITORS WHICH MAY REDUCE OR INHIBIT EXPANSION. SOME OF THE MOST RELIABLE METHODS ARE TOO TIME-CONSUMING, WHILE THE MORE RAPID METHODS SERVE ONLY TO REVEAL THE PRESENCE OF REACTIVE CONSTITUENTS IN THE AGGREGATE. FURTHER DEVELOPMENT IS NEEDED. /PCA/

• Authors:
  • Lerch, W
• Publication Date: 0

Media Info

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

Subject/Index Terms

• TRT Terms: Aggregates; Chemical reactions; Chemical tests; Concrete; Concrete aggregates; Geological surveying; Materials tests; Petrography; Test procedures; Volume changes; Wetting and drying tests
• Uncontrolled Terms: Aggregate testing
• Old TRIS Terms: Petrographic investigations
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00213523
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 74
• Files: TRIS
• Created Date: May 25 1970 12:00AM