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
Chat with Us Online Now
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: Bond Properties of 1/2 in. Diameter Strand
Author(s): A. D. Edwards and A. Picard
Publication: Journal Proceedings
Appears on pages(s): 684-689
Keywords: beams (supports);bond (concrete to reinforcement);bonding;concretes; cracking (fracturing);crack width and spacing;prestressed concrete; prestressing steels;pull-out tests;stresses;tensile strength;tests.
Abstract:The bond-slip relations obtained from six pull-out specimens and six tensile bond specimens are reported. Three covers 0.5, 1.0, and 1.5 in. (1.27, 2.54, and 3.81 cm) were used, the strand being held horizontally during casting. In all cases the bond-slip curve could be identified as elastic-plastic , there being no deterioration in the maximum bond stress with increasing slip unless a longitudinal crack occurred. For the small number of specimens tested, the shape of the curve was found to be independent of the method of testing but the maximum bond stress increased as the cover decreased. The average data obtained was used to predict the average crack width at various stresses in the tensile member, these results are compared with the average crack width obtained during eight tensile member tests. The actual scatter and the predicted scatter of results are also compared. The predictions using the most accurate formula are good, the predictions lose accuracy with the use of simplified formulas but the errors are on the conservative side.
Click here to become an online Journal subscriber