In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Validation of Modified B3 Model to Predict Early-Age Stress Development of Concrete
Author(s): Benjamin E. Byard, Anton K. Schindler, Kyle A. Riding, and Kevin J. Folliard
Publication: Materials Journal
Appears on pages(s): 691-700
Keywords: creep; elastic moduli; physical properties; strain effects
Abstract:The B3 Model is a compliance model that was designed and calibrated to estimate instantaneous and time-dependent strain behavior of concrete with a loading age of 1 day or more. Modifications were developed to correct the B3 model for rapidly changing viscoelastic and elastic properties of early-age concrete between setting and 1 day. Early-age stress and mechanical property development of 72 concrete mixtures with different materials, mixture proportions, and temperature histories were measured and compared to early-age stresses calculated using the Modified B3 Model. The unbiased estimate of standard deviation decreased from 0.78 to 0.42 MPa (113 to
60 psi), and the coefficient of determination increased from 0.59 to 0.80 when predictions with the Modified B3 Model are compared to the unmodified B3 Model. This magnitude of improvement is similar to that obtained when the Modified B3 Model was originally developed, which thus validates the Modified B3 Model.
Click here to become an online Journal subscriber