Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Radiographic control of mineral fibre-reinforced cement plates
Paper accepted for presentation to the Third International Conference on Composite Materials in Paris, France, 26 - 29 August, 1980. The usefulnes of the radiographic technique in the examination of Spinrock fibres reinforced cement plates was investigated with soft X-rays. A preliminary investigation has shown that soft X-rays are most suitable for radiography of cement plates, and therefore a 50 kV X-ray machine with a 0.5 mm focus and beryllium window X-ray tube was used throughout the investigation. X-ray films of different speed and graininess were used, and it was proved that a relatively fast Kodak Industrex D film can produce radiographs of adequate quality. An Agfa-Gevaert Structurix IC paper can also be used. Radiographs of cement plates, taken both on X-ray film and paper were scanned using a transmission or reflection densitometer. Optical density readings from the densitometer were fed into a paper chart recorder. The results of the radiographic test were transferred to a quantitative measure by densitometer scanning from which the relative standard deviations in the optical densities were used. These measures show a significant correlation with the flexural strengths, measured on the same specimens. We therefore conclude that the material distribution can be measured oy X-ray radiography, and that this distribution is a very important parameter for the evaluation of the quality of cement plates reinforced with discontinuous mineral fibres.
Radiographic control of mineral fibre-reinforced cement plates
Paper accepted for presentation to the Third International Conference on Composite Materials in Paris, France, 26 - 29 August, 1980. The usefulnes of the radiographic technique in the examination of Spinrock fibres reinforced cement plates was investigated with soft X-rays. A preliminary investigation has shown that soft X-rays are most suitable for radiography of cement plates, and therefore a 50 kV X-ray machine with a 0.5 mm focus and beryllium window X-ray tube was used throughout the investigation. X-ray films of different speed and graininess were used, and it was proved that a relatively fast Kodak Industrex D film can produce radiographs of adequate quality. An Agfa-Gevaert Structurix IC paper can also be used. Radiographs of cement plates, taken both on X-ray film and paper were scanned using a transmission or reflection densitometer. Optical density readings from the densitometer were fed into a paper chart recorder. The results of the radiographic test were transferred to a quantitative measure by densitometer scanning from which the relative standard deviations in the optical densities were used. These measures show a significant correlation with the flexural strengths, measured on the same specimens. We therefore conclude that the material distribution can be measured oy X-ray radiography, and that this distribution is a very important parameter for the evaluation of the quality of cement plates reinforced with discontinuous mineral fibres.
Radiographic control of mineral fibre-reinforced cement plates
Domanus, J.C. (Autor:in) / Møller-Jensen, L. (Autor:in)
01.01.1980
Domanus , J C & Møller-Jensen , L 1980 , Radiographic control of mineral fibre-reinforced cement plates . Risø-M , no. 2222 , Risø National Laboratory , Roskilde, Denmark .
Buch
Elektronische Ressource
Englisch
DDC:
690
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