Beton- und Stahlbetonbau最新文献_第5页

Prüfverfahren zur Messung des elektrischen Widerstands an carbonfaserhaltigem Mörtel 测量碳纤维砂浆电阻的试验方法

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-27 DOI: 10.1002/best.202500021

Annika Kunz M.Sc., Prof. Dr.-Ing. habil. Jeanette Orlowsky

{"title":"Prüfverfahren zur Messung des elektrischen Widerstands an carbonfaserhaltigem Mörtel","authors":"Annika Kunz M.Sc., Prof. Dr.-Ing. habil. Jeanette Orlowsky","doi":"10.1002/best.202500021","DOIUrl":"https://doi.org/10.1002/best.202500021","url":null,"abstract":"Test methods for measuring the electrical resistivity of mortar containing carbon fibersIn the construction industry, billions in damages occur annually due to chloride-induced corrosion. Therefore, developing new concepts to extend the lifespan of endangered structures substantially is a significant future task. Developing conductive fiber mortars as a chloride barrier aims to present a new alternative. To achieve a comprehensive barrier function, determining the electrical conductivity of the carbon fiber-containing mortar is crucial. Various measurement methods for assessing electrical resistance are examined and compared in this context. Common methods include two-point and four-point electrode techniques. Each method has its specific advantages and disadvantages regarding accuracy and applicability. Determining key parameters is essential for implementing innovative protective measures such as electrically conductive carbon fiber mortar as a chloride barrier. The comparison of these methods is intended to provide valuable insights into the optimal selection of measurement techniques, thereby contributing to the improvement of maintenance strategies.","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 8","pages":"596-605"},"PeriodicalIF":0.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automatisierte, qualitätsgesicherte Prozesse zur Schnellfertigung adaptiver, bewehrter Betonmodule – Umsetzung in eine Forschungsanlage 自动化、质量保证的过程，用于快速生产自适应钢筋混凝土模块-实施到研究设施

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-27 DOI: 10.1002/best.202500016

Jannik Hoppe M.Sc., Dr.-Ing. Patrick Forman, Dr.-Ing. Mario Wolf, Prof. Dr.-Ing. habil. Peter Mark, Prof. Dr.-Ing. Detlef Gerhard

{"title":"Automatisierte, qualitätsgesicherte Prozesse zur Schnellfertigung adaptiver, bewehrter Betonmodule – Umsetzung in eine Forschungsanlage","authors":"Jannik Hoppe M.Sc., Dr.-Ing. Patrick Forman, Dr.-Ing. Mario Wolf, Prof. Dr.-Ing. habil. Peter Mark, Prof. Dr.-Ing. Detlef Gerhard","doi":"10.1002/best.202500016","DOIUrl":"https://doi.org/10.1002/best.202500016","url":null,"abstract":"Automated, quality-assured processes for the rapid production of adaptive, reinforced concrete modules - implementation in a research facilityModular construction methods based on building blocks principle enable cost-effective and fast construction. This requires geometrically and materially precisely manufactured modules, which can be implemented and largely automated in industrial prefabrication. However, such prefabrication is not yet common and is limited to similar serial components such as railroad sleepers. In the paper, a full-scale research facility is developed that keeps the individual steps of automated production in high-precision variable and opens them up to modules of any shape. The system can be used to develop the individual process steps of shuttering, reinforcing, concreting, hardening or qualifying, and to develop the overall process in a quality-assured rapid circular manner or to test meaningful alteration (adaptivity), such as in cross-sectional dimensions or shapes. Three robots are integrated for automation. They place free-form molds and built-in parts, weld reinforcements or qualify geometrically with lasers and stereo cameras or mechanically with rebound hammers. A special curing chamber with circulating air and heating plates with direct contact to the steel formwork enables controlled heat and moisture treatments for curing times of less than an hour. A simulation model is being developed as part of the plant's digital twin, which will help to improve the robot movements.","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 7","pages":"504-516"},"PeriodicalIF":1.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultraschlanke vorgespannte Carbonbetonbinder – Pilotanwendung in einer Schulsporthalle Teil 1 超薄预应力碳混凝土粘合剂-试点应用于学校体育馆第1部分

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-27 DOI: 10.1002/best.202500035

Prof. Dr.-Ing. Alexander Schumann, Dr.-Ing. Juliane Wagner, Dr.-Ing. Melchior Deutscher

{"title":"Ultraschlanke vorgespannte Carbonbetonbinder – Pilotanwendung in einer Schulsporthalle Teil 1","authors":"Prof. Dr.-Ing. Alexander Schumann, Dr.-Ing. Juliane Wagner, Dr.-Ing. Melchior Deutscher","doi":"10.1002/best.202500035","DOIUrl":"https://doi.org/10.1002/best.202500035","url":null,"abstract":"Ultra-slim prestressed carbon concrete girders – Pilot application in a school sports hall Part 1: Design and production of the componentsAs part of a pilot project, a roof structure made of prestressed carbon concrete was realized for the first time under real construction and usage conditions in Dresden. The new single-court sports hall at the 49th Primary School features a fully modular roof system consisting of prestressed carbon concrete girders and thin prestressed carbon concrete slabs. The aim was to create resource-efficient, durable, and slender structures outside of a classical research framework. Despite the absence of official standards for prestressing with carbon reinforcement, the project achieved project-specific approval (ZiE) through extensive preliminary investigations, conservative design approaches, and targeted experimental testing. The project impressively demonstrates that carbon concrete combined with prestressing offers significant advantages in terms of material savings, durability, and resource efficiency. At the same time, key challenges were identified, such as manufacturing tolerances for extremely slender cross-sections, stability verification during transport and assembly, and the development of suitable connection details for thin slabs. Special attention was given to controlling deformations and ensuring sufficient failure warning under extremely slender construction conditions. The project forms an essential basis for further transferring research results into practice and shows ways in which carbon concrete can be used more economically and efficiently in future construction projects.","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 9","pages":"727-734"},"PeriodicalIF":0.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Einblicke zum Rapid Chloride Migration Test – Präzision, Chloridverlauf und Chloridbinden 快速氯化物迁移试验：精度、过程和氯化物结合。

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-27 DOI: 10.1002/best.202500022

Hannah Drenkard M.Sc., Prof. Dr.-Ing. Christian Fischer

引用次数: 0

Inhalt: Beton- und Stahlbetonbau 5/2025 内容：混凝土和钢筋混凝土结构5/2025

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-21 DOI: 10.1002/best.202580530

引用次数: 0

Vorschau: Beton- und Stahlbetonbau 5/2025 混凝土和钢筋混凝土工程5/2025

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-21 DOI: 10.1002/best.202580542

引用次数: 0

Veranstaltungen: Beton- und Stahlbetonbau 5/2025 混凝土和钢筋混凝土建筑5/2025

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-21 DOI: 10.1002/best.202580589

引用次数: 0

Verantwortung bauen – Nachhaltigkeit gestalten 建立可持续性

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-21 DOI: 10.1002/best.202580531

Dr.-Ing. Viviane Adam Viviane Adam

引用次数: 0

Titelbild: Beton- und Stahlbetonbau 5/2025 混凝土和钢筋混凝土建筑5/2025

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-21 DOI: 10.1002/best.202580511

{"title":"Titelbild: Beton- und Stahlbetonbau 5/2025","authors":"","doi":"10.1002/best.202580511","DOIUrl":"https://doi.org/10.1002/best.202580511","url":null,"abstract":"Röntgen – seit über einhundert Jahren in der Medizin etabliert, hält die Methode in der Bauwerksdiagnostik erst heute Einzug in Form digitaler Radiographie. Sie bietet einmalige Vorteile gegenüber allen anderen zerstörungsfreien Methoden. Die direkte Bildgebung als Schwarz-Weiß-Foto aus dem Bauteilinnern ermöglicht die Identifikation von Einbauteilen, Bewehrung sowie Mängeln und Schäden mit sonst unerreichbarer Aussagesicherheit. Alles, was auf einem Röntgenbild identifiziert werden kann, kann außerdem millimetergenau vermessen werden. Somit können korrosionsbedingte Querschnittverluste an Bewehrung, Verpresszustände von Hüllrohren und ganze Bauteilquerschnitte sichtbar gemacht und für Qualitätssicherung, statische Nachrechnung oder eine zielführende Instandsetzungsplanung rekonstruiert werden. Der Beitrag auf Seite 378-387 erläutert anhand verschiedener Beispiele aus der Praxis, welche Möglichkeiten die Radiographie im Bauwesen bietet und wo die Anwendungsgrenzen liegen. Das Titelbild zeigt den Einsatz an einer Spannbetonbrücke mit dünnwandigen Fertigteilträgern und ein Röntgenbild mit drei Spanngliedern. (Bild: Bauray GmbH)","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 5","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/best.202580511","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Beton- und Stahlbetonbau aktuell Beton- und Stahlbetonbau 5/2025 混凝土和钢结构混凝土和钢结构

IF 1 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-05-21 DOI: 10.1002/best.202580581

引用次数: 0