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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: Determination of Chemical Composition and Electrical Resistivity of Expressed Cementitious Pore Solutions Using X-Ray Fluorescence
Author(s): Marisol Tsui-Chang, Prannoy Suraneni, Luca Montanari, Jose F. Muñoz, and W. Jason Weiss
Publication: Materials Journal
Appears on pages(s): 155-164
Keywords: electrical resistivity; formation factor; pore solution; X-ray fluorescence
Abstract:Ionic transport in concrete can be described using the formation factor. The formation factor is computed as the ratio of the resistivity of the bulk concrete to the resistivity of the pore solution. As such, calculation of the formation factor requires knowledge of pore solution resistivity. The objective of this study is to use X-ray fluorescence (XRF) to determine the pore solution composition and to calculate the pore solution resistivity from the pore solution composition. The calculated pore solution resistivity is compared to experimentally measured results obtained using a resistivity meter. The results indicate that XRF can be used to accurately determine the composition of the pore solution and this can be used to compute its resistivity. A comparative study on simulated pore solutions was also performed using inductively coupled plasma atomic emission spectroscopy (ICP-AES) to further validate the use of the XRF method to obtain the pore solution composition.
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