01476682

Component

https://doi.org/10.3141/2342-15

http://scholar.google.com...aede&publication_year=2013

The objectives of this research were (a) to monitor in situ bridge deck properties such as moisture and diffusivity for both conventional concrete and concrete containing prewetted lightweight fine aggregate, which is intended to provide internal curing; (b) to compare deck performance in terms of early-age cracking; and (c) to evaluate the compressive strength and chloride permeability of concrete mixtures in the laboratory using cylinders cast in the field at the time of deck construction. The research scope included four bridges—two constructed with conventional concrete and two containing prewetted lightweight fine aggregate—in northern Utah. Data from sensors embedded in the concrete decks indicated that the moisture content of the internally cured concrete was 2% to 3% higher at 28 days than the moisture content of the conventional concrete. Although the internally cured concrete had a higher moisture content, the electrical conductivity values were approximately the same for all decks after a few months; these values suggested that the two types of concrete had similar diffusivity. At 28 days, the average strength of the internally cured concrete was 1% higher than that of the conventional concrete, and the internally cured concrete passed between 2% and 30% less current during the rapid chloride permeability test than the conventional concrete. After 2 months, three to five cracks about 0.2 to 0.3 mm in width were found on each of the conventional concrete bridge decks, but no visible signs of cracking were found in the bridge decks with internal curing.

01494308

13-5374

English

p 121–128

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309263399

Print

Figures (5) ; Photos; References (19) ; Tables (6)

Bridge decks; Cast in place structures; Chloride content; Compressive strength; Concrete bridges; Concrete curing; Cracking; Diffusivity; Fine aggregates; Moisture content; Permeability coefficient

Utah

Bridges and other structures; Highways; Materials; Pavements; I32: Concrete

TRIS, TRB, ATRI

Feb 5 2013 1:01PM

• Comparison of the Superpave Gyratory and Proctor Compaction Methods for the Design of Roller-Compacted Concrete Pavements
• Effect of High-Volume Fly Ash on Shear Strength of Concrete Beams
• Evaluation of Drilled Shafts with Self-Consolidating Concrete
• Factors That Influence Electrical Resistivity Measurements in Cementitious Systems
• Identifying Improved Standardized Tests for Measuring Cement Particle Size and Surface Area
• Importance of Insulation at the Bottom of Mass Concrete Placed on Soil with High Groundwater
• Improving Concrete Sustainability and Performance with Use of Portland–Limestone Cement Synergies
• Influential Depth by Water Absorption and Surface Drying in Concrete Slabs
• Isothermal Calorimetry as a Tool to Evaluate Early-Age Performance of Fly Ash Mixtures
• Low-Cost Techniques for Improving the Surface Durability of Pervious Concrete
• Observed Variability in Tests of Fresh Concrete Properties from the FHWA Highway Materials Engineering Course
• Performance of Pore-Lining Impregnants in Concrete Protection by Unidirectional Salt-Ponding Test
• Reducing the Specimen Size of the AASHTO T 97 Concrete Flexural Strength Test for Safety and Ease of Handling
• Ruggedness Study on the AASHTO T 336 Coefficient of Thermal Expansion of Concrete Test Method