The Influence of Internal Curing on Basic Creep and Autogenous Shrinkage

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: The Influence of Internal Curing on Basic Creep and Autogenous Shrinkage

Author(s): M. Lopez, L.F. Kahn, and K.E. Kurtis

Publication: Special Publication

Volume: 256

Issue:

Appears on pages(s): 57-70

Keywords: creep; internal curing; lightweight concrete; shrinkage

Date: 10/1/2008

Abstract:
This research explores the influence of internal curing on time dependent strains under no water exchange with the environment, i.e., basic creep and autogenous shrinkage. The behavior of high-performance concrete mixtures (HPC) containing pre-wetted lightweight aggregate (HPLC-1) for internal curing was compared to companion mixtures containing air-dried lightweight aggregate (HPLC-2). It was found that internally stored water reduced basic creep in direct relation to the amount of water held in the aggregate. Reductions in basic creep, up to 49%, were found between dry and prewetted lightweight aggregate mixtures. Further, internally stored water reduced autogenous shrinkage to the extent that actual expansion occurred proportional to the amount of internal water.