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Title: Review of measurement techniques and principles with potential application for development of device to indicate adequacy of fresh concrete consolidation
Authors: Alexander, A. Michel.
Keywords: Air content
Consolidation meter
Fresh concrete
Nondestructive testing
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; SL-92-3.
Description: Miscellaneous Paper
Abstract: A literature review and evaluation was performed to determine the potential of developing a device to measure degree of consolidation of freshly placed concrete in situ for improving quality control. Standard techniques exist to determine the air content of concrete as it comes from the mixer but not in situ. The features of an ideal device are discussed as a goal in the development of an optimum device. Measurement fundamentals such as resolution, accuracy, data storage, display, cost, ease of operation, etc. are discussed that relate to the development of such a device. The advantages and disadvantages of basing a device on the measurement of various phenomena such as electrical, optical, ultrasonic, nuclear, and other properties are discussed. Devices based on electrical resistivity, ultrasonics, and fiber optics show considerable promise, but more research is needed by independent organizations. It is believed that the technology exists to improve quality control and quality assurance measurements for in-place concrete. It should be possible to detect in situ whether the concrete needs revibration prior to hardening.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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