Title:
Early Age Concrete Strength Determination
by Maturity
Author(s):
Thomas J. Parsons and Tarun R. Naik
Publication:
Concrete International
Volume:
7
Issue:
2
Appears on pages(s):
37-43
Keywords:
age-strength relation; compressive strength;
concretes; cylinders; regression analysis; temperature;
water-cement ratio.
DOI:
Date:
2/1/1985
Abstract:
Reports the results of an investigation into the use of the maturity method for predicting the early age strength of concrete. Concrete specimens, composed of 12 variations of 2 cement types, 2 aggregate types, and 3 water-cement ratios, were subjected to different curing temperatures: 37 F (2.8 C), 55 F (12.8 C), 73 F (22.8 C), and the outdoor environment. Evaluation of the results of tests conducted at ages between 12 and 168 hr (7 days) are presented for these specimens. A linear regression model is developed for the prediction of the minimum compressive strength of concrete. The model is based on a modified maturity function where 0 C (32 F) was assumed for the datum temperature. This results in a method for predicting minimum con-crete strength for normal temperature fluctuations.