POTENTIAL REACTIVITY OF AGGREGATE IN CONCRETE AND MORTAR

DESCRIPTIONS ARE GIVEN OF THE ALKALI-AGGREGATE AND CEMENT- AGGREGATE REACTIONS, THE ASTM METHOD C289-52T (CHEMICAL METHOD), C295-52T (PETROGRAPHIC), C227-52T (MORTAR BAR TEST) AND THE SCHOLER AND THE CONROW TESTS. CONTROL OF CHEMICAL REACTIVITY IS BY REDUCTION OF REACTANTS IN THE AGGREGATE, BY USING LOW ALKALI CEMENTS (0.6 PERCENT OR LESS SODIUM OXIDE), BY REMOVAL OF ALKALIES FROM ADMIXTURES AND AGGREGATES, BY WATERPROOFING THE STRUCTURE, BY USING CERTAIN POZZOLANIC ADMIXTURES, AND BY INCORPORATING AIR VOIDS INTO THE MIXTURE (HIGHLY POROUS AGGREGATE).

• Supplemental Notes:
  • Bulletin No 193, PP 41-45, 12 REF
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Mielenz, R C
• Publication Date: 1953-10

Subject/Index Terms

• TRT Terms: Admixtures; Aggregates; Air voids; Alkali; Alkali aggregate reactions; Alkalinity; Cement; Chemical reactivity; Mortar; Porous materials; Pozzolan; Reactive aggregates; Waterproofing materials
• Uncontrolled Terms: Low alkali cement
• Old TRIS Terms: Air voids content; Alkalies
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217615
• Record Type: Publication
• Source Agency: Highway Research Board Bibliography
• Files: TRIS
• Created Date: Jul 15 1994 12:00AM