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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: Early Age Cracking: A Case Study in How Materials Modeling Can Improve Concrete Quality
Author(s): J.L. Poole and K.A. Riding
Publication: Special Publication
Appears on pages(s): 57-72
Keywords: calorimetry; hydration; modeling; temperature prediction.
Abstract:Early-age cracking can reduce the service life of reinforced concrete structures by providing a path for the ingress of moisture. This cracking is caused by a complex interaction among concrete material properties, construction methods, and the environment, especially during the early age curing period. In order to prevent early age cracking, the concrete mixture and construction methods must be complementary and chosen with care.
Early age concrete simulations can be used to minimize the risk of cracking by optimizing the materials and construction techniques for the local environmental conditions. These simulations are rarely performed however, because of the great expense and time needed to quantify the early age concrete mechanical properties (modulus, tensile strength, creep, coefficient of thermal expansion, etc.). Recent breakthroughs in material science and concrete technology have enabled the development of needed early-age concrete material property models. An early age temperature development and thermal stress simulation tool named ConcreteWorks was recently completed that allows engineers and contractors to quickly optimize concrete construction with reduced laboratory testing. ConcreteWorks includes several material behavior models that were developed to eliminate the need for expensive, specialized testing. This paper presents the development of ConcreteWorks, along with examples of its application on recently completed construction projects. These case studies illustrate how materials science modeling techniques can be simplified for the end user needs.
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