DISTRESS OF AGGREGATE BY ADSORBED WATER

RESEARCH CONDUCTED TO STUDY DETERIORATION OF AGGREGATE BY WATER IS REPORTED. HYPOTHESIS EXPLAINING WET-DRY DETERIORATION IS DISCUSSED. THE WET-DRY SENSITIVITY OF CERTAIN ARGILLACEOUS DOLOMITIC ROCKS MAY BE CAUSED BY THE PETROLOGY AND PETROGRAPHY OF THESE ROCKS. WATER ADSORPTION CHARACTERISTICS OF VARIOUS ARGILLACEOUS ROCKS ARE EXAMINED. SINCE ICE DOES NOT APPEAR A REQUISITE FOR DETERIORATION OF SHALY ROCKS OR CERTAIN ARGILLACEOUS, DOLOMITE CARBONATE ROCKS, PERHAPS IT IS NOT NECESSARY FOR DESTRUCTIVE FORCES. TO TEST THIS EFFECT COLD QUANTITIATIVE DIFFERENTIAL THERMAL ANALYSIS EQUIPMENT WAS CONSTRUCTED. RESULTS SHOW THAT ADSORBED WATER DID NOT FREEZE. SORPTION EVALUATION PROCEDURES ARE DISCUSSED. IT SEEMS LIKELY THAT BOTH FROST SENSITIVITY AND ALKALI REACTIVITY ARE FUNCTIONS OF CLAY-DOLOMITE CONTENT.

• Supplemental Notes:
  • pp 171-183, 6 FIG, 18 REF
• Authors:
  • Dunn, J R
• Conference:
  • Highway Geology Symposium, Iowa State U
• Publication Date: 1968-7

Subject/Index Terms

• TRT Terms: Adsorption; Aggregates; Alkali aggregate reactions; Carbonate rocks; Clay; Deterioration; Differential thermal analysis; Dolomite; Frost susceptibility; Petrography; Sorption; Water; Wetting and drying tests
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00213350
• Record Type: Publication
• Report/Paper Numbers: pp 128-129
• Files: TRIS
• Created Date: Jul 7 1994 12:00AM