CONTROL OF REACTIVE CARBONATE ROCKS IN CONCRETE
The effects of using reactive carbonate rocks as concrete aggregates were evaluated in a laboratory investigation. Three reactive carbonate rocks, each producing a different manifestation of the alkali-carbonate rock reaction in concrete, were each used at three dilution levels, one with low-alkali and two with high-alkali portland cements, to make concrete specimens that were tested for length changes for 3 yr in a moist environment, and for compressive and tensile strengths to 1 yr. Limited testing for compressive strength was extended to 3 yr. A carbonate rock and a granite gneiss were also used as coarse aggregates in other concrete mixtures to serve as controls. The detection procedure and control criteria of Appendix C of the Standard Practice for Concrete for potentially reactive carbonate rocks intended for use as concrete aggregates were considered for validity in view of the laboratory results. The test data indicate that the numerical values used in Appendix C are satisfactory without change. It is recommended that Appendix C be modified to permit optional testing of potentially reactive rocks in concrete when this seems desirable.
U.S. Army Waterways Experiment Station3909 Halls Ferry Road
Vicksburg, MS USA 39180-6199
- Buck, A D
- Publication Date: 1975-9
- Features: Figures; References; Tables;
- Pagination: 80 p.
- TRT Terms: Alkali; Carbonate rocks; Chemical reactions; Coarse aggregates; Compression tests; Compressive strength; Concrete; Concrete aggregates; Gneiss; Laboratory tests; Reactive aggregates; Rocks; Strength of materials; Tensile properties; Tensile strength; Test procedures
- Uncontrolled Terms: Compressive properties
- Old TRIS Terms: Alkalies; Compressive strength tests; Gneisses
- Subject Areas: Construction; Geotechnology; Highways; Materials;
- Accession Number: 00093804
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: AEWES-TR-C-75-3 Final Rpt.
- Files: TRIS
- Created Date: Feb 4 1976 12:00AM