Title:
Fracture Toughness of Concrete at Early Ages
Author(s):
Tianxi Tang, Dan G. Zollinger, and Rae H. Yoo
Publication:
Materials Journal
Volume:
90
Issue:
5
Appears on pages(s):
463-471
Keywords:
aggregates; cracking (fracturing); crack width and spacing; compressive strength; concretes; Materials Research
DOI:
10.14359/3877
Date:
9/1/1993
Abstract:
This paper reports the experimental results involving the application of the size effect law to early-age concrete for determining the material fracture parameters K lf and c f. These parameters were determined for concrete with several different coarse aggregates at 1-day age, showing that this test method is applicable both in the laboratory and at the construction work site. Tests for concrete at different ages, from half a day to 28 days, showed that early-age concrete is more brittle than mature concrete. Increases in K lf and c f with concrete age are observed. The K lf and c f values at early ages may be used as a criterion to evaluate concrete quality.