01519083

Component

https://doi.org/10.3141/2441-14

https://scholar.google.co...eiss&publication_year=2014

Internal curing is effective at reducing shrinkage and early-age cracking in cementitious systems with low water-to-cementitious materials ratios. In the United States, internal curing is typically accomplished using prewetted lightweight aggregate made by expanding slate, clay, or shale. This research focused on the use of porous slag aggregate, a byproduct of the iron and steel industry, for the internal curing of concrete. Five aggregates were evaluated for use in internal curing. The aggregates were produced from different manufacturing processes. Expanded, pelletized, and air-cooled slag aggregates were chosen for advanced testing. The research began by measuring the absorption and desorption properties of the aggregates. Laboratory testing of concrete mixtures containing select aggregates was performed to evaluate mechanical and durability properties. Full-scale testing was carried out with concrete produced at a ready-mix plant. A conventional department of transportation bridge deck mixture was compared with a similar concrete that was internally cured with prewetted expanded slag aggregate. Internally cured concrete made with expanded slag aggregate was shown to reduce shrinkage cracking with similar or improved overall mechanical and durability properties when compared with the conventional mixture.

01547891

14-3304

English

pp 105–111

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295307

Print

Figures (5) ; Photos; References (18) ; Tables (3)

Absorption; Admixtures; Concrete curing; Desorption; Durability; Laboratory tests; Shrinkage; Slag coarse aggregates

United States

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

TRIS, TRB, ATRI

Jan 27 2014 3:08PM

• Acoustic Emission and Low-Temperature Calorimetry Study of Freeze and Thaw Behavior in Cementitious Materials Exposed to Sodium Chloride Salt
• Capillary Pressure Monitoring in Plastic Concrete for Controlling Early-Age Shrinkage Cracking
• Determination of Required Insulation for Preventing Early-Age Cracking in Mass Concrete Footings
• Development of Aggregate Avoidance Index for Evaluating Recycled Aggregate Concrete
• Development, Field Testing, and Implementation of Improved Bridge Parapet Designs
• Effect of Fiber-Reinforced Polymer Wrapping on Concrete Chloride Penetration and Concrete Cover
• Fracture Properties of Roller-Compacted Concrete with Virgin and Recycled Aggregates
• Kinetic Study of Photocatalytic Degradation of Nitrogen Monoxide with Titanium Dioxide Nanoparticles in Concrete Pavements
• Laboratory and Field Investigations on High-Volume Fly Ash Concrete for Rigid Pavement
• Methodology for Identifying Zero-Stress Time for Jointed Plain Concrete Pavements
• Mixture Design for Minimizing Cement Content in Pavement Concrete
• Nanoconcrete for Rigid Pavements: Abrasion Response and Impact on Friction
• Observed Variability in Cylinder and Core Strength from FHWA Highway Materials Engineering Course
• Performance of Portland Limestone Cements
• Surface Texture Measurements of Crack Surface to Establish Joint Shear Stiffness
• Volume Stability and Cracking Potential of Prebagged, Cement-Based Nonshrink Grouts for Field-Cast Connections