00771107

Component

https://doi.org/10.3141/1668-03

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

The installation and condition of the first two very-early-strength latex-modified concrete (LMC-VE) overlays constructed for the Virginia Department of Transportation are described. The overlays were prepared with a special blended cement rather than with the Type I/II cement used in the conventional latex-modified concrete (LMC) overlay. LMC-VE mixture proportions, installation equipment, and procedures are similar to those used for conventional LMC overlays. However, when working with LMC-VE, the contractor must work faster because the concrete loses slump rapidly and the curing period is approximately 3 rather than 72 hours. Tests of the compressive strength of the LMC-VE overlay performed during the early hours after installation indicated that traffic could be placed on the overlay within 3 hours rather than within the 4 to 7 days required for the conventional LMC overlay. Tests of bond strength and permeability to chloride ion indicated that the overlays are performing satisfactorily and can be used as an alternative to LMC to extend the life of bridge decks. Pending continuing favorable test results, it is anticipated that LMC-VE overlays can be used when construction during short lane-closure periods is highly desirable. The use of LMC-VE may reduce inconvenience to motorists, allow for installation at night, provide negligible to very-low permeability, and provide high strength, particularly high early strength.

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

English

p. 18-23

1999

Transportation Research Record

0309070635

Figures (2) ; Photos (2) ; References (6) ; Tables (7)

Bond strength (Materials); Bridge decks; Chlorides; Compressive strength; Concrete curing; Concrete overlays; High early strength cement; Latex modified concrete; Permeability; Slump test

Construction; Highways; Materials; I32: Concrete; I52: Construction of Pavements and Surfacings

TRIS, TRB, ATRI

Oct 6 1999 12:00AM

• BOND INTERACTION BETWEEN CONCRETE PAVEMENT AND LEAN CONCRETE BASE
• CONCRETE CAPILLARY POROSITY AS IT RELATES TO DURABILITY OF PAVEMENTS BUILT WITH ALKALI-SILICA-REACTIVE AGGREGATES
• 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
• VIRGINIA'S APPROACH TO EVALUATION OF CONCRETE RESISTANT TO ALKALI-SILICA REACTIONS