Internal Curing of High Performance Concrete Using Light Weight Aggregates and other Techniques

Project Details
STATE

CO

SOURCE

Colorado DOT

END DATE

02/01/14

RESEARCHERS

Wesley A. Jones, Mitch W. House, W. Jason Weiss

SPONSORS

Colorado DOT

KEYWORDS

absorption, autogenous shrinkage, chemical shrinkage, Coarse aggregates, desorption, drying shrinkage, fine aggregates, HPC, IC, LWAs, porous inclusions, spatial distribution, transport properties

LINKS

Products

Project description

Internally cured concrete has been rapidly emerging over the last decade as an effective way to improve the performance of concrete. Internal curing (IC) holds promise for producing concrete with an increased resistance to early-age cracking and enhanced durability (Bentz and Weiss, 2011). IC is a simple and effective way to cure concrete. Proper internal curing supplies water that is necessary to relieve stress buildup due to self-desiccation. Typically this is done using pre-wetted lightweight aggregates (LWAs), as this is the most commercially available application at the present time. IC has shown reduced autogenous and drying shrinkage cracking, improved fluid absorption resistance, improved compressive strength, and reduced ion diffusion. It is becoming increasingly clear that internal curing has great potential for the concrete industry to create a longer lasting, more sustainable product.
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