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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.
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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: Revisiting Effects of Cylinder Cap Type and Eccentricity— Part II: Failure Mode and End Conditions
Author(s): Michael J. Bolduc, Dan Mullins, and Ken Hover
Publication: Materials Journal
Appears on pages(s): 13-20
Keywords: acceptance criteria; bonded caps; compression strength; cylinder testing; neoprene caps; quality control; sulfur caps; test methods; unbonded caps; variability
Abstract:Part I of this paper analyzed compressive strength results from one hundred 6 x 12 in. (152 x 304 mm) cylinders cast from a single batch of ready mixed concrete, tested with both bonded and unbonded cylinder caps, concluding that while either cap type produced approximately equivalent strength, there was a significant difference in the standard deviations of the two populations. Further, strength obtained with unbonded caps was less sensitive to variations in cylinder eccentricity during testing. Part II continues with the observations that predominant failure modes differed with cap type and eccentricity. There is some evidence of connection between the end condition or flatness of the cylinders and failure mode.
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