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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: Effect of Curing Method and Final Moisture Condition on
Compressive Strength of Concrete
Author(s): Sandor Popovics
Publication: Journal Proceedings
Appears on pages(s): 650-657
Keywords: air; compressive strength; concretes; curing; drying; epoxy resins;moist curing: moisture; moisture content; wetting.
Abstract:Specimens were prepared from a concrete batch and kept in molds for the first 24 hours, then divided into groups. Each group was cured at standard 73 F (23 C) temperatures but under different wetness conditions before compressive strength was tested. The procedure was repeated with two more batches of different compositions. Curing methods differed with varying combinations of fog room and air curing. Results show not so much that a concrete is stronger in an air-dry state than in a wet state, as has been previously recognized, but rather that a concrete specimen provides higher compressive strength in a drying state than in a rewetting state. A drying state is when the surface of the concrete is dryer than the inside. A possible mechanism is offered for these strength differences. Practical significance of the experiment includes a contribution to a better interpretation of the results of compressive strength tests and an indication that fluctuations in strength results can be reduced by tightening curing specifications. The results may also lead to a better understanding of the source of strength in a hardened cement paste.
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