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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: Effects of Drying and Form and Shore Removal on Flexural Cracking in Beams and Slabs
Author(s): K. C. Hover
Publication: Special Publication
Appears on pages(s): 169-184
Keywords: beams (supports); concrete construction; concrete slabs; cracking (fracturing); drying; flexural strength; form removal; shoring; formwork (construction); Structural Research
Abstract:The development of flexural cracking in beams and slabs is discussed with particular reference to the incidence of cracking caused by the removal of formwork and shoring. Flexural cracking is shown to be distinct from, and only indirectly related to, structural capacity. The resistance to cracking is directly related to the modulus of rupture of the concrete, which is likewise indirectly related to the more commonly known compressive or "cylinder" strength of the concrete. Resistance to cracking is shown to decrease sharply during periods in which the surface of the concrete is drying, such as the period of time immediately following the removal of forms.
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