Radioisotope X-ray Methods for Field Analysis of Wet Concrete Quality PDF Download
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Author: P. F. Berry
Publisher:
ISBN:
Category : Methodology
Languages : en
Pages : 76
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Book Description
Author: P. F. Berry
Publisher:
ISBN:
Category : Methodology
Languages : en
Pages : 76
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Book Description
Author: Patrick Fleetwood Berry
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 98
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Book Description
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.
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1290
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Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 24
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Author: Highway Innovative Technology Evaluation Center (U.S.)
Publisher: ASCE Publications
ISBN: 9780784474044
Category : Technology & Engineering
Languages : en
Pages : 60
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Book Description
Prepared by the Highway Innovative Technology Evaluation Center, a CERF Service Center. This report describes a HITEC evaluation designed to determine the basic capabilities and limitations of the Model 4430 gauge, manufactured by the Troxler Electronic Laboratories,Øfor use in quality control and quality assurance procedures for concrete construction. The ratio of water to cementitious materials in a concrete mix is recognized as a prime determinant of the strength and ultimate durability of the concrete. The Model 4430 Nuclear Water/Cement Ratio Gauge is designed to measure the water-to-cement ratio in fresh concrete sequentially. The evaluation was carried out in four phases: computer simulations, laboratory testing,precision and bias evaluation, and field demonstrations.
Author: United States. Federal Highway Administration. Offices of Research and Development
Publisher:
ISBN:
Category :
Languages : en
Pages : 704
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Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1372
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Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 198
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Book Description
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1388
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Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1348
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