00771118

Component

https://doi.org/10.3141/1668-14

http://scholar.google.com...ting&publication_year=1999

Several concrete pavements have been constructed in southwestern Minnesota using aggregates that recently have tested as being potentially deleteriously alkali-silica reactive. Standard ASTM test procedures were used. Most of these pavements have failed to meet their design life. However, the rate of deterioration varies. Six pavement sites varying in age and performance were selected for comparison. Alkali-silica gel is present in all six pavements, even in the 36-year-old pavement still in good condition. Similar aggregate types were used for all six pavements. The coarse aggregate was a low-grade metamorphic quartzite, and the fine aggregate was a glacial sand obtained from various local sources. The relative capillary porosity of the concrete paste was examined using fluorescent dye epoxy impregnated thin-section samples from each pavement site. Preliminary results suggest that the capillary porosity is linked to the durability of the concrete pavement. The best-performing concretes had a homogeneous capillary porosity that was moderate to low, and the poorer-performing concretes had paste with a capillary porosity that varied from high to low.

This paper appears in Transportation Research Record No. 1668, Concrete in Pavements and Structures.

English

p. 91-96

1999

Transportation Research Record

0309070635

Figures (10) ; References (9) ; Tables (1)

Alkali silica reactions; Capillarity; Concrete pavements; Deterioration; Durability; Porosity; Quartzite; Sand

Minnesota

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I32: Concrete

TRIS, TRB, ATRI

Oct 8 1999 12:00AM

• BOND INTERACTION BETWEEN CONCRETE PAVEMENT AND LEAN CONCRETE BASE
• CRACKING DAMAGE/DETERIORATION AND REHABILITATION CONSIDERATIONS OF SOME BIRMINGHAM, ALABAMA, INTERSTATE BRIDGE DECKS
• EFFECT OF MICROCRACKING ON DURABILITY OF HIGH-STRENGTH CONCRETE
• GEOCHEMICAL METHOD FOR IDENTIFYING ALKALI-SILICA-REACTION GEL
• IMPACT OF PROCESSED CELLULOSE FIBERS ON PORTLAND CEMENT CONCRETE PROPERTIES
• INFLUENCE OF ALKALINE EARTH SILICATE ADMIXTURE ON DURABILITY OF PENNSYLVANIA TURNPIKE BRIDGES
• INFLUENCE OF TOTAL AGGREGATE GRADATION ON FREEZE-THAW DURABILITY AND OTHER PERFORMANCE MEASURES OF PAVING CONCRETE
• INVESTIGATION OF DESIGN PARAMETERS AFFECTING TRANSVERSE CRACKING IN JOINTED CONCRETE PAVEMENTS
• MITIGATION OF ALKALI-SILICA REACTION IN PAVEMENT PATCH CONCRETE THAT INCORPORATES HIGHLY REACTIVE FINE AGGREGATE
• PROPOSED GUIDELINES FOR THE PREVENTION OF ALKALI-SILICA REACTION IN NEW CONCRETE STRUCTURES
• USE OF A LITHIUM-BEARING ADMIXTURE TO SUPPRESS EXPANSION IN CONCRETE DUE TO ALKALI-SILICA REACTION
• VERY-EARLY-STRENGTH LATEX-MODIFIED CONCRETE OVERLAY
• VIRGINIA'S APPROACH TO EVALUATION OF CONCRETE RESISTANT TO ALKALI-SILICA REACTIONS