CHEMICAL CHARACTERISTICS OF SOME CARBONATE AGGREGATE AS RELATED TO DURABILITY OF CONCRETE

A SUMMARY OF THE RESULTS OF THE CHEMICAL STUDY OF CARBONATE ROCKS FROM SEVERAL QUARRIES IN NORTHEAST IOWA WHICH PRODUCED CARBONATE AGGREGATE FOR HIGHWAY PAVEMENT CONCRETE IS PRESENTED. ROCK FROM ONE THE QUARRIES HAS PROVEN TO BE DEFINITELY UNSATISFACTORY FOR USE AS AGGREGATE AND IS BEING USED AS A COMPARATIVE STANDARD. COMPARISON IS BASED ON THE THREE FOLLOWING PHASES OF INVESTIGATION: (1) ANALYSIS FOR MAJOR CONSTITUENTS (CHEMICAL DESCRIPTION OF ROCK TYPES), (2) DETERMINATION OF THE TYPE AND QUANTITY OF POTENTIALLY REACTIVE DELETERIOUS CONSTITUENTS CONTAINED IN THE AGGREGATES, AND (3) CHEMICAL ANALYSIS AND STUDY OF AGGREGATE TAKEN FROM SAMPLES OF AFFECTED CONCRETE. AN INVESTIGATION OF THE EQUILIBRIA ESTABLISHED BETWEEN CERTAIN CARBONATE ROCKS AND SILICA SOLUTIONS AT PH 12 IS BEING CARRIED OUT TO DETERMINE WHAT REACTIONS TAKE PLACE. /AUTHOR/

Media Info

  • Monograph Title: Air voids in concrete and characteristics of aggregates
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00217761
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 19 1994 12:00AM