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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: Temperature-Related Mechanical Effects in Concrete Elements and Optimization of the Manufacturing Process
Author(s): E Acker; C. Foucrier; and Y. Malier
Publication: Special Publication
Appears on pages(s): 33-48
Keywords: computer programs; concretes; heat of hydration; optimization; precast concrete; prestressed concrete; reinforced concrete; setting (hardening); temperature; tests; thermal stresses.
Abstract:The DITEX computer program was developed to predict the temperature distribution in a concrete structural element during manufacture and to evaluate the resulting stresses. This program takes account of several types of boundary conditions : variable ambient temperatures, and various kinds of formwork and heat treatment. A simple and inexpensive specific test has been developed to determine the heat of hydration of the cement, the kinetics of which are a function of position. The test consists of recording the temperature during setting of a concrete sample subjected to adiabatic conditions. These tools have recently been applied to actual cases (bridges, tunnels, pressure vessels, etc.) and have demonstrated the variety of their applications: - optimization of the temperature cycle, making possible a significant reduction in fuel consumption; - better distribution of heating resistors to avoid cracks completely; - selection of the type of cement based on quantitative analysis - a judicious staging of the casting of large structures.
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