Title:
The Influence of Internal Curing on Basic Creep and Autogenous Shrinkage
Author(s):
M. Lopez, L.F. Kahn, and K.E. Kurtis
Publication:
Symposium Paper
Volume:
256
Issue:
Appears on pages(s):
57-70
Keywords:
creep; internal curing; lightweight concrete; shrinkage
DOI:
10.14359/20231
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.