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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: Experiences on the Use of Expansive Component Type G in Mexico
Author(s): Alma Reyes
Publication: Special Publication
Appears on pages(s): 1-10
Keywords: Component Type G, control joint spacing, cracking reduction, drying shrinkage, durability, expansion, shrinkage control applications.
Abstract:Expansive component systems provide the possibility to control the effects of concrete drying shrinkage in civil
engineering applications, promoting durability for new construction and repair alternatives. Drying shrinkage is a
natural consequence of concrete upon water loss after hardening. When there are restrictions such as internal
reinforcement, adjacent structural elements and subgrade friction, concrete drying shrinkage can lead to cracking if no
provisions are considered on the mix design or on the construction procedure.
Expansive component Type G reacts chemically with Portland cement and water in the concrete mix to produce calcium hydroxide platelet crystals, which after setting, produce a volume increase. Providing internal or external restrictions, a concrete, that contains an expansive component system, can induce compression stress in the concrete mass and tension stress in the reinforcement. Concrete cracking can be reduced because such induced compression stress counteracts the tensile stress in the concrete mass caused by drying shrinkage.
This article comprises a variety of applications of concrete, including the expansive component Type G, in Mexico as
a solution means of improved functionality and durability of modern construction.
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