Title:
Influence of Drying on Strength
of Concrete Specimens
Author(s):
C. D. Johnston and E. H. Sidwell
Publication:
Journal Proceedings
Volume:
66
Issue:
9
Appears on pages(s):
748-755
Keywords:
cracking (fracturing) ; drying; moisture content;plain concrete; shrinkage; specimens;tensile strength.
DOI:
10.14359/7399
Date:
9/1/1969
Abstract:
Observed reductions in the 28 day strength of plain concrete specimens, dried in air before testing, are shown to agree with theoretical values calculated using a reduced effective cross-sectional area, which results when moisture diffusion from a specimen causes varying degrees of shrinkage across its cross section, to such an extent that cracking penetrates from the surface inwards. The results show that this reduction in tensile strength cannot exceed one third of the strength of the saturated concrete, and that it is independent of specimen size.