Sand Neudefinition des Schluffgehalts für die Betonherstellung

Name: Sand Neudefinition des Schluffgehalts für die Betonherstellung
Brand: Verlag Unser Wissen
SKU: 9786209713101
Price: 5119.0 INR
Availability: InStock

by Zenagebriel Gebremedhn

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ISBN13: 9786209713101
Binding: Paperback
Subject: N/A
Publisher: Verlag Unser Wissen
Publisher Imprint: Verlag Unser Wissen
Publication Date: March 21, 2026
Pages: 68
Original Price: USD 57.0
Language: German
Edition: N/A
Item Weight: 105 grams
BISAC Subject(s): General

About The Book

Die Betonproduktion verlagert sich aufgrund der schwindenden nat�rlichen Sandressourcen und der Umweltbeschr�nkungen f�r den Abbau von Flusssand immer mehr auf Fertigsand. Fertigsand unterscheidet sich von Natursand in Form, Textur, K�rnung und Feingehalt, insbesondere bei Material, das das Sieb Nr. 200 passiert. Die derzeitigen Normen begrenzen den Schluffgehalt auf der Grundlage des nat�rlichen Sandes, was die Hersteller zwingt, die Zuschlagstoffe zu stark zu waschen, was die Kosten und die Umweltbelastung erh�ht. In dieser Studie wird die Auswirkung eines h�heren Schluffgehalts (0-15 %) in Fertigsand auf Frisch- und Festbeton mit Wasserzementwerten von 0,58, 0,54 und 0,45 untersucht, die f�r normal-, mittel- und hochfesten Beton stehen. Bewertet wurden Verarbeitbarkeit, Oberfl�cheng�te und Druckfestigkeit. Probleme bei der Verarbeitbarkeit wurden eher durch die Anpassung des Wasser-Zement-Verh�ltnisses als durch chemische Zusatzmittel gemildert. Die Ergebnisse zeigen, dass Beton mit einem Schluffgehalt von bis zu 15 % die Verarbeitbarkeit und Festigkeit beibehalten oder verbessern kann, was die Notwendigkeit unterstreicht, die derzeitigen Grenzwerte f�r den Schluffgehalt in den Normen f�r Fertigsand zu �berdenken.

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