A SIMPLE CHEMICAL TEST METHOD FOR THE DETECTION OF ALKALI-SILICA REACTIVITY OF AGGREGATES

The proposed method consists of suspending a mixture of cao and the aggregate to be tested in a saturated solution of an alkali chloride, preferably kcl, maintained at 70 deg C. After 24 hours the suspension is cooled, filtered and the oh-ion concentration of the filtrate measured. The oh-ion concentration is then compared to that of a control suspension of a mixture of a quartz sand and cao treated in the same way. Any lowering of oh-ion concentration in the test solution, compared to the control, indicates a potential alkali-silica reactivity of the aggregate. The difference in the oh-ion concentrations between the test and the control is a measure of the alkali-silica reactivity of the aggregate under test. It is of interest to note that in this test oh-ion concentration never exceeds that of a cement paste. The testing could be carried out in the field and could be used for the quality control of the aggregate.(a)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Chatterji, S
  • Jensen, A D
• Publication Date: 1988-7

Language

• English

Media Info

• Pagination: p. 654-6
• Serial:
  • Cement and Concrete Research
  • Volume: 18
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Aggregates; Alkali; Chemical analysis; Chemical reactions; Oxides; Silicon; Tests
• ITRD Terms: 4577: Aggregate; 7353: Alkali; 7163: Chemical analysis; 8525: Conference; 7372: Oxide; 9064: Quick; 7156: Reaction (chem); 7148: Silicon; 6255: Test; 6288: Test method
• Subject Areas: Geotechnology;

Filing Info

• Accession Number: 00481741
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 30 1989 12:00AM