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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: Mechanism of Secondary Ettringite Formation in Mortars and Concretes Subjected to Heat Treatment
Author(s): D. Heinz and U. Ludwig
Publication: Special Publication
Appears on pages(s): 2059-2072
Keywords: concrete durability; deterioration; ettringite; expansion; heating; humidity; portland cements; precast concrete; SO3 content; temperature; water-cement ratio; General
Abstract:In recent years, precast units made of high-strength concrete that have been heat treated during production have shown partly damaged structure related to loss of strength. This damage always occurred in those building components that, for several years, had been subjected to open-air weathering, e.g., front panels and sleepers. The damage has often been characterized by crack formation emerging from the edges of the building components, as well as by a loss of bond between the cement paste and the coarse aggregate. To explain this damage, a series of parameters have been examined as to their influence on the durability of heat-treated concretes. Besides others, the investigation concentrated on the threshold temperature of damage, the SO3 content of the cement, the humidity of storage, and the water-cement ratio.
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