POTENTIALLY REACTIVE CARBONATE ROCKS PROGRESS REPORT NO. 8-A STRATEGY FOR USE AND CONTROL OF POTENTIALLY REACTIVE CARBONATE ROCKS INCLUDING AN ANNOTATED BIBLIOGRAPHY OF VIRGINIA RESEARCH

THE REPORT OUTLINED A STRATEGY FOR THE USE AND CONTROL OF CONCRETE AGGREGATES FROM SOURCES THAT MAY CONTAIN DOLOMITE LIMESTONES DELETERIOUSLY REACTIVE WITH CEMENT ALKALIES. THE RECOMMENDATIONS ARE BASED UPON THE RESULTS FROM A COMPREHENSIVE RESEARCH PROJECT WHICH HAS INCLUDED STUDIES OF MATERIALS CHARACTERISTICS, THE MECHANISMS OF REACTION, TESTING METHODS, AND FIELD PERFORMANCE. THE ANNONATED BIBLIOGRAPHY CONTAINED IN THE REPORT INCLUDED 34 REPORTS, PAPERS, AND PRESENTATIONS FROM THE COUNCIL'S RESEARCH THAT FORM THE BASES FOR THE RECOMMENDATIONS. THE GOAL OF THE CONTROL PROGRAM IS TO AVOID THE INCLUSION OF REACTIVE AGGREGATES IN CONCRETE OR IF THIS IS IMPOSSIBLE TO REDUCE THEIR AMOUNT TO LESS THAN 20 PERCENT OF THE AGGREGATE CONTENT. THE STRATEGY IS BASED UPON TWO STAGES OF SAMPLING. IN STAGE I, COMPARATIVELY FEW SAMPLES WOULD BE TESTED FROM EACH PRODUCING SOURCE. SOURCES IN WHICH DETRIMENTALLY REACTIVE ROCK IS ABSENT WOULD BE APPROVED FOR USE. FOR SOURCES CONTAINING MATERIAL CLASSIFIED AS REACTIVE BASED UPON THE STAGE I SAMPLING, MORE EXTENSIVE STAGE II SAMPLING WOULD BE REQUIRED. AGGREGATES WOULD BE CLASSIFIED AS REACTIVE BASED UPON THE RESULTS OF TESTING: (1) BY MEANS OF LENGTH CHANGE MEASUREMENTS OF ROCK MADE IN ACCORDANCE WITH ASTM C586, (2) FROM PETROGRAPHIC EXAMINATION OF ROCK AS DESCRIBED IN ASTM C295, AND (3) IN UNUSUAL CASES USING THE PROCEDURES OF ASTM C157 TO MEASURE LENGTH CHANGES OF CONCRETE CONTAINING THE ROCK AS AGGREGATES. BASED UPON THE RESULTS FROM THE RESEARCH PROJECT, VALUES FOR CLASSIFYING AGGREGATES AS REACTIVE OR NONREACTIVE HAVE BEEN ESTABLISHED. /FHWA/

• Supplemental Notes:
  • REP NO VHRC 71-R41
• Corporate Authors:

  Virginia Highway Research Council

  Charlottesville, VA  United States 

  University of Virginia, Charlottesville

  Center for Transportation Studies, P.O. Box 400742
  Charlottesville, VA  United States  22904-4742

  Virginia Department of Highways

  Richmond, VA  United States  23219
• Authors:
  • Newlon, H H
  • Sherwood, W C
  • Ozol, M A
• Publication Date: 1972-6

Media Info

• Pagination: 24 p.

Subject/Index Terms

• TRT Terms: Alkali aggregate reactions; Calcium oxide; Concrete aggregates; Dolomite; Quality control; Reactive aggregates; Sampling; Specifications
• Old TRIS Terms: Dolomitic quicklime; Quality control testing
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00217506
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 7 1973 12:00AM