Nichtrostende Bewehrungsstähle zur Verlängerung der korrosionsfreien Lebensdauer von Stahlbetonbauwerken

Greve‐Dierfeld, Stefanie von; Bisschop, Jan; Schiegg, Yves

doi:10.1002/best.201700038

Cited by 7 publications

(10 citation statements)

References 18 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Folgende Betonstahlsorten werden im Rahmen der Lebenszykluskostenberechnung eingesetzt: unlegierter Bewehrungsstahl, ferritischer nichtrostender Stahl mit einem Chromgehalt > 12 % und gebeizt, Werkstoffnummer 1.4003 (Top12‐Stahl), vgl. auch , austenitischer bzw. ferritisch‐austenitischer nichtrostender Stahl, z.…”

Section: Lebenszykluskostenbetrachtung Für Verschiedene Bauteileunclassified

“…Zur Berücksichtigung des höheren korrosionsauslösenden Chloridgehalts von Top12‐Stahl wurde im Modell der Parameter „kritischer Chloridgehalt“ im Vergleich zu unlegiertem Stahl verdreifacht . Für Edelstahl mit KWK ≥III wurden keine Lebensdauerberechnungen durchgeführt, da hier definitionsgemäß keine chloridinduzierte Bewehrungskorrosion auftritt.…”

Section: Lebenszykluskostenbetrachtung Für Verschiedene Bauteileunclassified

See 1 more Smart Citation

Lebenszykluskostenbetrachtungen für chloridexponierte Bauteile von Brücken‐ und Tunnelbauwerken

Rausch¹,

Zintel

Linden

2019

Beton und Stahlbetonbau

View full text Add to dashboard Cite

An Verkehrsbauwerken mit nur sehr geringem Alter sind in der Vergangenheit vermehrt Schäden aufgetreten. Ursache ist die hohe Chloridbelastung durch Streusalz/Sole aus dem Winterdienst, welche chloridinduzierte Bewehrungskorrosion hervorruft. Die Instandsetzung resultierender Schäden ist nicht zuletzt aufgrund in der Regel erforderlicher Verkehrssicherungsmaßnahmen sehr kostenintensiv. Immer öfter stellt sich die Frage, welche Maßnahmen zu ergreifen sind, um zum einen Kosten zu reduzieren und zum anderen aber eine hohe Dauerhaftigkeit bei gleichzeitiger Robustheit der Maßnahme sicherzustellen. In diesem Zusammenhang wurden Lebenszykluskostenbetrachtungen für stark chloridbeaufschlagte Bauteile, wie Brückenkappen, Brückenmittelpfeiler, Tunnelnotgehwege, Tunnelinnenwände durchgeführt. Es wurden verschiedene Stahlgüten (konventionelle vs. nichtrostende Bewehrung) und Oberflächenschutzsysteme (OS‐System vs. Tiefenhydrophobierung) sowie verschiedene Instandsetzungsvarianten (Erneuerung OS‐System vs. Instandsetzung) verglichen. Für eine abschließende Bewertung relevanter Varianten wurden neben den Lebenszykluskosten zusätzlich auch die Themen „Dauerhaftigkeit“ sowie „Baupraktische Gesichtspunkte“ berücksichtigt.

show abstract

Section: Lebenszykluskostenbetrachtung Für Verschiedene Bauteileunclassified

Lebenszykluskostenbetrachtungen für chloridexponierte Bauteile von Brücken‐ und Tunnelbauwerken

Rausch¹,

Zintel

Linden

2019

Beton und Stahlbetonbau

View full text Add to dashboard Cite

show abstract

“…Consumers nowadays mostly prefer certain pieces of meat (fillet pieces), while many of the remaining parts (e.g., offal) are rejected or regarded as waste [3,4]. Recently, however, there has been a trend back to the holistic utilization of slaughtered animals, especially in gastronomy, and also in private households [46]. In a consumer study, "nose-to-tail" was evaluated positively by 75.4% of the respondents.…”

Section: Options For the Efficient Utilization Of Plant-based Foodsmentioning

confidence: 99%

“…Reconstituted meat is used, inter alia, for the production of ham, schnitzel, or chicken nuggets. Reconstituted meat must be labelled in the EU [46]. A consumer-related study has shown that consumers perceive reconstituted meat as a modification of the product identity and are skeptical [56].…”

Section: Options For the Efficient Utilization Of Plant-based Foodsmentioning

confidence: 99%

Comparing “Leaf-to-Root”, “Nose-to-Tail” and Other Efficient Food Utilization Options from a Consumer Perspective

Nitzko

Spiller

2019

Sustainability

View full text Add to dashboard Cite

The efficient use of natural raw materials is a key element of sustainable development and is also gaining importance in the food sector. Consumers are increasingly realizing that food is too valuable to be used only partially. However, consumer acceptance is an important precondition for establishing efficient food utilization options. A total of 470 German consumers were surveyed through an online-questionnaire where they had to evaluate three options each for the efficient use of plant-based foods as well as animal-based foods with respect to eight different criteria. The results show that the six options differed significantly regarding consumer acceptance. The efficient use of plant-based foods (especially non-standard fruits/vegetables and the "leaf-to-root" principle) was more accepted than the efficient utilization of animal-based foods. Furthermore, it can be seen that options using the by-products in a natural form were considered more acceptable than those which subject the by-products to some form of processing. These results provide an insight into the views of consumers on food waste reduction strategies, which are frequently debated in the sustainability discussion.The acceptance of consumers is an essential precondition not only for being able to utilize the various methods of efficiently using either plant-or animal-based foods but also for successfully establishing new products based on food by-products [6][7][8]. Some studies show that sustainability-related [9] and ethical aspects [10] have gained in importance in food consumption on the side of the consumer. In addition, there is also an increasing general awareness of the subject of food waste and a growing appreciation of food [11,12]. Nevertheless, based on people´s culinary habits, the by-products of foods are still often regarded as waste [13] and are negatively associated by consumers (e.g., contamination) [14,15].It is known that deficits of trust in the food industry on the side of the consumer [16] can have adverse effects on the acceptance of the various methods of efficiently using foodstuffs or even the development of new products using by-products from the value chain stage of the food processing industry. The use of by-products for food production can be associated with consumer concerns regarding the use of raw materials of lower quality for cost-saving or the production of products of reduced quality [8]. In addition, consumers can have reservations towards certain innovative technologies [17], which are sometimes used for the efficient utilization of by-products.Against this background, six options of efficiently utilizing food, located at different stages of the value chain, will be presented and discussed in the following. Three methods for the efficient utilization of plant-based by-products will be considered: the "leaf-to-root" principle, non-standard fruits/vegetables, and the innovative production of valuable substances (by means of food and biotechnological processing techniques). The three methods for the efficient u...

show abstract

“…Such high chromium steels form a protective passive layer of chromium oxides on the steel surface. Depending on the type and content of alloying elements, as well as the production, stainless steels in various types of microstructures (ferrite, austenite, martensite, a mixture of austenite and ferrite (duplex steel) or a mixture of ferrite and martensite (dual-phase steel)) may be present in regards to the steric configuration of atoms [5]. This will also influence the tendency to corrosion, hardness and firmness among others.…”

Section: Unalloyed and Alloyed Reinforcing Barsmentioning

confidence: 99%

Corrosion behaviour of rebars 1.4003 in cracks of RC structures containing chlorides

Dauberschmidt

Fraundorfer

2018

MATEC Web Conf.

View full text Add to dashboard Cite

The durability of chloride exposed reinforced concrete components is decisively determined by the corrosion behaviour of the reinforcement in the crack containing chlorides. In this case, high corrosion rates may occur using conventional rebar steel, which can lead to a significant cross-sectional loss of the rebar in a short period of time. One possible way to minimise the risk of corrosion in cracks containing chlorides is to use stainless rebars. Here, mostly expensive stainless steels of the material numbers 1.4571, 1.4401 etc. are used. An efficient alternative is the use of Chromium reinforcing steels (e.g. X2CrNi12) 1.4003. Corrosion tests on cracked reinforced concrete beams with chloride exposure and different chloride concentrations have been carried out in the laboratory of the University of Applied Sciences in Munich. The results of these investigations show a significant increase of the critical corrosion inducing chloride content of the rebars within the cracks. These results will be discussed in regard of the durability of reinforced concrete structures with Chromium reinforcing steels and cracked RC-structures in parking decks and floor slabs.

show abstract

Nichtrostende Bewehrungsstähle zur Verlängerung der korrosionsfreien Lebensdauer von Stahlbetonbauwerken

Cited by 7 publications

References 18 publications

Lebenszykluskostenbetrachtungen für chloridexponierte Bauteile von Brücken‐ und Tunnelbauwerken

Lebenszykluskostenbetrachtungen für chloridexponierte Bauteile von Brücken‐ und Tunnelbauwerken

Comparing “Leaf-to-Root”, “Nose-to-Tail” and Other Efficient Food Utilization Options from a Consumer Perspective

Corrosion behaviour of rebars 1.4003 in cracks of RC structures containing chlorides

Contact Info

Product

Resources

About