Author : Patrick Fleetwood Berry
Release : 1970
Genre : Concrete
Kind :
Book Rating : /5 ( reviews)

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Radioisotope X- and Gamma-ray Methods for Field Analysis of Wet Concrete Quality - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Radioisotope X- and Gamma-ray Methods for Field Analysis of Wet Concrete Quality write by Patrick Fleetwood Berry. This book was released on 1970. Radioisotope X- and Gamma-ray Methods for Field Analysis of Wet Concrete Quality available in PDF, EPUB and Kindle. The results of an initial feasibility study, (covered in detail by an earlier report are reviewed, and the design and operation of a prototype instrument for the field determination of cement in wet (plastic) Portland cement concrete are described. Gamma-ray scattering techniques are used in a probe of submersible design. Two radioisotope sources are employed with a single scintillation counter detector. The electronic unit simultaneously registers the two intensities and the cement content is interpreted from a calibration curve. The measurement is compensated for bulk density and water content variation and is insensitive to aggregate particle size. Compensation for aggregate type is discussed. The instrument is portable, rugged and simple to operate. The method appears sound for concrete mixes containing aggregates which are predominantly siliceous in nature. Although applicable to aggregate mixes which contain some limestone, accuracy declines rapidly with increasing limestone content as a result of the reduction in the intrinsic, sensitivity to cement factor and the increase in the bulk density influence.