Title: An Investigation of Standard Concrete Cylinders
Author(s): Gilbert R. Williamson
Publication: Journal Proceedings
Appears on pages(s): 151-154
The standard procedure for making concrete test cylinders tends to bring water to the top of the cylinder. Presents experimental results to show that standard 6 x 12 in. concrete cylinders are not of uniform strength and that the top one-third is the weakest part.