00217443

Component

http://onlinepubs.trb.org...s/hrr/1966/120/120-002.pdf

METHODS USED IN THE PETROGRAPHIC EXAMINATION OF COARSE AND FINE NATURAL CONCRETE AGGREGATE ARE DESCRIBED. FEATURES OF AGGREGATES, BASED ON THEIR COMPOSITION, STRUCTURE, AND TEXTURE, INFLUENCING THE QUALITY OF A CONCRETE ARE DISCUSSED. IN ADDITION TO STANDARD PETROGRAPHIC METHODS THE COPPER NITRATE STAINING TEST HAS BEEN FOUND USEFUL FOR BOTH IDENTIFICATION AND APPRAISAL OF CARBONATE MATERIALS. ATTENTION IS ALSO DRAWN TO THE NEED FOR FURTHER TESTING OF SPECIAL AGGREGATES, SUCH AS THE ALKALI-SILICA-REACTIVE OR THE ALKALI-CARBONATE ROCK-REACTIVE AGGREGATES AND THOSE CONTAINING CLAY MINERALS. THE ROLE OF THE PETROGRAPHER IS STRESSED IN COMPLEMENTING AND INTERPRETING STANDARD ACCEPTANCE TESTS DESIGNED TO DETERMINE THE SUITABILITY OF A GIVEN MATERIAL AS CONCRETE AGGREGATE. /AUTHOR/

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01410075

pp 7-17

1966

Highway Research Record

Digital/other

Figures (2) ; References (25)

Aggregates; Alkali aggregate reactions; Carbonates; Clay minerals; Coarse aggregates; Concrete aggregates; Fine aggregates; Geological surveying; Identification systems; Materials selection; Natural aggregates; Petrography; Quality control; Structures; Test procedures; Texture

Identification; Quality

Bridges and other structures; Geotechnology; Highways

TRIS, TRB

Nov 18 1994 12:00AM

• IDENTIFICATION OF COARSE AGGREGATES THAT UNDERGO DESTRUCTIVE VOLUME CHANGES WHEN FROZEN IN CONCRETE
• The Skid-Resistant Properties of Carbonate Aggregates