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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: Embedded Sensors for Measuring Environmental Parameters in Concrete
Author(s): D.A. Lange, Z.C. Grasley, and R. Rodden
Publication: Special Publication
Appears on pages(s): 41-52
Keywords: cracking; creep; embedded sensors; environment; instrumentation; relative humidity; shrinkage; slab curling; temperature
Abstract:Environmental factors are major considerations of health monitoring of structures. A new system has been developed for measuring the internal relative humidity and temperature in concrete laboratory specimens and field structures. Internal relative humidity measurements in concrete are useful for evaluating shrinkage stress development and assessing structural susceptibility to durability problems. This paper describes the system, presents the essential elements of analysis that relates RH to internal stress in porous materials, and presents field applications that shows how environment data can facilitate analysis of stress and deformation of pavement. The new system has been used in laboratory and field experiments. Advantages of the new system are summarized. Some problems encountered in measuring relative humidity, especially in the field, are discussed.
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