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: Bond of Reinforcement to Revibrated Concrete
Author(s): Wilsam A. K. Altowaiji, David Darwin, and Rex C. Donahey
Publication: Journal Proceedings
Appears on pages(s): 1035-1042
Keywords: bond (concrete to reinforcement); concrete construction; consolidation; cover; reinforced concrete; reinforcing steels; revibration; vibration; workability.
Abstract:The effects of revibration on concrete-steel bond strength are studied. Key variables are concrete slump, bar position, and the time interval between initial vibration and revibration. No. 8 (25 mm) deformed reinforcing bars were used with a 2 in. (51 mm) cover and a 10 in. (254 mm) bonded length. Concrete slumps ranged from 2 3/4 in. to 7 « in. (70 to 190 mm). Two specimen depths were used. All specimens were modified cantilever beam specimens. The experimental results show that revibration is not universally beneficial to concrete-steel bond. Revibration appears to improve bond strength for top-cast bars placed in high-slump concrete. Revibration may, however, severely damage bond strength for bars cast in well-consolidated, low-slump concrete. Revibration is almost universally detrimental to the bond strength of bottom-cast bars. Overall, revibration tends to reduce the differences in bond strength caused by differences in slump and bar position.
Click here to become an online Journal subscriber