00217428

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http://onlinepubs.trb.org...ubs/hrr/1964/45/45-005.pdf

TWO INVESTIGATIONS CONCERNING ALKALI-CARBONATE REACTIVITY COMPLETED AT THE WATERWAYS EXPERIMENT STATION ARE SUMMARIZED . THE INVESTIGATIONS WERE CONCERNED WITH AGGREGATES FROM SOUTH DAKOTA, KANSAS, AND MISSOURI. THE STRUCTURES FROM WHICH THE CONCRETE CORES WERE TAKEN ARE ALL LOCATED IN THE NORTHEASTERN QUADRANT OF KANSAS AND THE SOUTHEASTERN QUADRANT OF NEBRASKA. AN INSTANCE IS DESCRIBED IN WHICH ALKALI-SILICIA REACTION AND THE ALKALI-CARBONATE REACTION, DEDOLOMITIZATION, WERE FOUND TO HAVE OCCURRED IN THE SAME LABORATORY SPECIMENS, BUT THE ALKALI-SILICA REACTION WAS APPARENTLY CONFINED TO DOLOMITIC LIMESTONES AND WAS MANIFESTED IN THE DEVELOPMENT OF BRUCITE IN THE MORTAR SURROUNDING THE DOLOMITIC LIMESTONE PARTICLES. THE SECOND PART OF THE STUDY DESCRIBES SEVEN MORE COMPLICATED SITUATIONS INVOLVING FIELD CONCRETES THAT ALL CONTAINED FINE AGGREGATES CAPABLE OF SOME ALKALI-SILICA REACTION, AND CARBONATE COARSE AGGREGATES WITH AND WITHOUT DOLOMITE, AND WITH AND WITHOUT CHALCEDONIC CHERT. THE SECOND PART DEMONSTRATES THAT THE QUESTION OF BENEFICIAL EFFECTS OF THE ADDITION OF CARBONATE COARSE AGGREGATES TO THE SANDS AND SAND-GRAVELS OF THE KANSAS-NEBRASKA AREA IS A VERY COMPLEX ONE IN WHICH THE CHEMICAL REACTIVITY OF THE CARBONATE COARSE AGGREGATES MAY BE OF THE GREATEST SIGNIFICANCE.

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01410012

pp 72-109

1964

Highway Research Record

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Figures (22) ; References (18) ; Tables (17)

Aggregates; Alkali aggregate reactions; Carbonate rocks; Chemical reactivity; Cherts; Coarse aggregates; Dolomite; Fine aggregates; Limestone; Sand

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Jan 25 1994 12:00AM

• A SURVEY FOR REACTIVE CARBONATE AGGREGATES IN VIRGINIA
• ALKALI REACTIVITY OF DOLOMITIC CARBONATE ROCKS
• ALKALI-CARBONATE REACTIVITY-AN ACADEMIC OR A PRACTICAL PROBLEM
• ALKALI-CARBONATE ROCK REACTION
• ALKALI-CARBONATE ROCK REACTIONS IN MICHIGAN
• ALKALI-REACTIVE CARBONATE ROCKS IN INDIANA - A PILOT REGIONAL INVESTIGATION
• ANNOTATED BIBLIOGRAPHY-ALKALI REACTIVITY OF CARBONATE ROCKS PART IV
• CARBONATE AGGREGATE REACTIONS: RECENT STUDIES AND AN APPROACH TO THE PROBLEM
• EXPANSION OF GULL RIVER CARBONATE ROCKS IN SODIUM HYDROXIDE
• LEARNING TO LIVE WITH A REACTIVE CARBONATE ROCK
• METHODS FOR REDUCING EXPANSION OF CONCRETE CAUSED BY ALKALI- CARBONATE ROCK REACTIONS
• STUDIES ON THE MECHANISMS OF ALKALI-CARBONATE REACTION PART I. CHEMICAL REACTIONS
• VARIATIONS IN PERFORMANCE OF CONCRETE WITH CARBONATE AGGREGATES IN IOWA