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C3 – Carbon Concrete Composite – From the largest construction research project to the most important association for carbon reinforced concrete construction. Carbon reinforced concrete is becoming increasingly used in practice: in new construction and in the field of retrofitting. Numerous companies, associations and institutions are working under the brand of C3 – Carbon Concrete Composite to make the use of carbon reinforced concrete technology easier, to exploit the numerous advantages of carbon reinforced concrete and thus to make a significant contribution to climate neutrality. This article describes the beginnings of the idea, which sounded absurd in the 1990s, and outlines the development phases from a construction research project to the most important association in the field of building with carbon reinforced concrete. [ABSTRACT FROM AUTHOR]

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Examination of concrete samples with CFRP and GFRP reinforcement by X‐ray computed tomography and laminography – concrete samples with CFRP and GFRP reinforcement Non‐metallic reinforcements are already widely used in concrete construction today. Up to now, material testing has mainly been carried out under destructive conditions. As a consequence, the position of the reinforcement within the concrete matrix is determined by inspection and measurement of saw cut interfaces. Imaging procedures as X‐ray computed tomography (XCT) and laminography (XCL) enable the nondestructive evaluation and location of carbon and glass fiber reinforcements within the volume of a concrete structure platform. The concrete cover as well as the yarn cross‐section, spacing and the position of the reinforcement can be determined in the concrete matrix by XCT, the latter with a deviation of < 0.2 mm in comparison with the destructive control measurements of the previous method by means of a measuring microscope. A special combination of limited‐angle X‐ray computed tomography (LAT) followed by XCL has been shown to increase the detailed recognition of the reconstructed sectional images compared to the individual procedures. [ABSTRACT FROM AUTHOR]

Copyright of Beton- Und Stahlbetonbau is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Beton- Und Stahlbetonbau is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Beton- Und Stahlbetonbau is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Zur effizienten und seriellen Herstellung von Textilbetonplatten im Gießverfahren fehlten bis zum jetzigen Zeitpunkt geeignete Abstandhalter, mit denen eine sichere Fixierung der textilen Bewehrung in einer Schalung möglich ist. Das Abstandhaltersystem DistTEX eröffnet jedoch diese Möglichkeiten. Die Lage der textilen Bewehrung bleibt während des Gießprozesses erhalten. Die Handhabung und die Einflüsse auf die Eigenschaften von Textilbetonbauteilen mit diesem neuen Abstandhaltersystem wurden an der TU Dresden untersucht und ausgewertet. Die Abstandhalter überzeugten in ihrer Anwendung und ihren Eigenschaften. Es konnte keine Minderung der Tragfähigkeit festgestellt werden. Die visuellen Untersuchungen der Betonoberflächen ergaben, dass die verwendeten Abstandhalter weder unter Normbedingungen noch unter Temperaturschwankungen von bis zu 60 K negativen Einfluss haben. Bei der Überprüfung der Lage der textilen Bewehrung konnten nur leichte Abweichungen von der Solllage festgestellt werden. Textile Reinforced Concrete produced in casting process with Spacer Up to now, an efficient or serial fabrication of textile reinforced concrete slabs through casting was impossible due to the lack of spacers for fixing the textile reinforcement in a formwork. However, the spacer-system DistTEX makes this possible now. The position of the textile reinforcement remains the same during the casting process. The handling of textile reinforced parts with this new spacer-system and its influence on the properties were researched and analysed at TU Dresden. The spacer-system was convincing with regard to its application and properties. Apparently, the load-bearing capacity was not reduced. A visual analysis of the concrete surface did not reveal any negative influences of the applied spacer-system either under normal conditions or under temperature variation of up to 60 K. The position of the textile reinforcement proved to have drifted only slightly from the reference position. [ABSTRACT FROM AUTHOR]

Copyright of Beton- Und Stahlbetonbau is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)