Untersuchungen Über Die Verdichtungswirkung Von Tauchrüttlern
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Mein hochverehrter Chef, Herr Professor Dr. G. GARBOTZ, ubertrug mir die Durchfuhrung eines Forschungsauftrages des Kultusministeriums Nordrhein- Westfalen, dessen Ergebnisse ich zu dieser Arbeit verwenden durfte. Es sollte die Verdichtungswirkung von Tauchruttlern untersucht und die Einflusse der dabei eine wichtige Rolle spielenden Faktoren festgestellt werden. Fur das mir damit erwiesene Vertrauen, fur seinen Rat und seine stetige Unt- stutzung, auch noch nach seiner Emeritierung im September 1959, mochte ich Herrn Prof. Dr. G. GARBOTZ aufrichtig danken. Fur die Bereitstellung der Einrichtungen sei an dieser Stelle den Firmen Gebr. Wacker KG - Maschinenfabrik - Munchen Netter - Vibrationstechnik - Wiesbaden Robert Bosch GmbH - Elektrowerkzeugbau - Stuttgart Maschinenfabrik G. Eirich - Nordheim (Baden) gedankt. 5 Inhalt 1. Einfiihrung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. 1 Allgemeines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. 2 Geschichtliches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. 3 Die Vorteile der Riittelverdichtung . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1. 4 Der Verlauf des Riittelvorganges . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. 41 Der Zustand des Frischbetons vor der Riittlung . . . . . . . . . . . . . . . 13 1. 42 Die Verdichtungswirkung in unmittelbarer Nahe der Flasche . . . 13 1. 43 Die Verbreiterung der Verdichtungswirkung . . . . . . . . . . . . . . . . . 14 1. 5 Der gegenwartige Stand der Erkenntnisse iiber die Riittelverdi- tung. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1. 6 Versuchsprogramm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2. Verwendete Materialien und Einrichtungen . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. 1 Beton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. 2 Tauchriittler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2. 3 MeBeinrichtungen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2. 31 MeBeinrichtung zur Messung des Raumgewichtes . . . . . . . . . . . . . 22 2. 32 MeBeinrichtung zur Messung der Wegamplitude . . . . . . . . . . . . . . 26 2. 33 MeBeinrichtung zur Messung der Beschleunigungsamplitude . . . . 28 2. 34 MeBeinrichtung zur Messung der Druckamplitude . . . . . . . . . . . . . 29 2. 4 Kasten. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2. 5 Filmkameras . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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