Preview

Author(s):	Zdanowicz, Katarzyna; Schmidt, Boso; Hansen, Michael; Marx, Steffen
Title:	Biege- und Verbundverhalten von chemisch vorgespannten textilbewehrten Betonelementen
Abstract:	Die chemische Vorspannung ist ein alternatives Verfahren zur Spannungseinleitung in Beton, das ohne mechanische Spannvorrichtungen auskommt. In diesem Beitrag werden die Ergebnisse von experimentellen Untersuchungen zum Trag- und Verformungsverhalten von dünnen textilbewehrten Quellbetonelementen vorgestellt. Hierzu wurden Verformungsmessungen zum freien und behinderten Quellen an Probekörpern unterschiedlicher Quellbetonmischungen sowie experimentelle Untersuchungen zum Biege- und Verbundverhalten von dünnen, mit Carbontextilgittern bewehrten Probekörpern durchgeführt. Die Versuchsergebnisse bestätigen, dass die Verwendung von Quellzusatzmitteln das Verhalten des Textilbetons beeinflusst. Die Beanspruchung bei Erstrissbildung sowie die Durchbiegung bei Erstrissbildung können mit zunehmendem Anteil von Quellzusatzmitteln erhöht werden. Zudem erreichen die Probekörper aus Quellbeton höhere maximale Verbundspannungen als entsprechende Probekörper ohne Quellzusatzmittel. Flexural and bond behaviour of chemically prestressed concrete elements with textile reinforcement Chemical prestressing is a method of introducing stresses into concrete with the use of expansive admixtures instead of mechanical devices. The paper presents an approach to chemical prestressing of thin textile reinforced concrete elements. Measurements of free and restraint expansion are described, as well as experimental investigations regarding flexural and bond behaviour of thin specimens with carbon textile grids. Results of four-point bending tests on slab members and of bond tests are presented. It was confirmed that the use of expansive concrete influences the behaviour of textile reinforced concrete specimens. The cracking load can be increased with increasing amount of expansive admixture, as well as the deflection at first cracking. Similarly, higher maximal bond stresses are achieved for specimens made of expansive concrete that of control mixture. The results are evaluated and an overview is provided.
Source:	Beton- und Stahlbetonbau 115 (2020), No. 12
Page/s:	972-979
Language of Publication:	German

I would like to buy the article

You can download this article for 25 € as a PDF file (1.6 MB).
The PDF file can be read, printed and saved.
Duplication and forwarding to third parties is not allowed.

Please enter your email address now to start the order process.
The link for the download will be sent to the email address stated after the
order process has been completed.

Your email address

I am an online subscriber

As an online subscriber of the journal "Beton- und Stahlbetonbau" you can access this article via Wiley Online Library.

I would like to order "Beton- und Stahlbetonbau"

This article has been published in the journal "Beton- und Stahlbetonbau". If you would like to learn more about the journal, you can order a free sample copy or find out more information on our website.

Prices include VAT and postage. Prices for 2017/2018.
€ Prices apply to Germany only. Subject to alterations, errors excepted.