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- Täljsten, Björn, 1961-, et al.
(författare)
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Assessment of prestressed concrete bridges - challenges
- 2020
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Ingår i: IABSE Symposium, Wroclaw 2020. - Zürich : International Association For Bridge And Structural Engineering (IABSE). ; , s. 487-494
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Konferensbidrag (refereegranskat)abstract
- Prestressed concrete bridges are important parts of our infrastructure. They are susceptible to different kinds of deterioration processes. Examples of damages and deficiencies are cracking, corrosion, voids, bond loss, reduction of cover layer, delamination, fatigue and loss of stiffness and strength. This necessitates methods to continuously assess their condition in order to avoid problems that might lead to shorter service life or reduction of structural integrity. Many of the existing prestressed bridges in Europe are now approaching their design life length. However, with proper and continuous inspection, monitoring and assessment, we may plan proactive maintenance and the structural safety can be assured or – if necessary - increased. This will save both money and decrease the environmental impact of the structure.
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- Emborg, Mats, et al.
(författare)
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Produktmodeller för platsgjuten betong
- 2004
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Applikation av IT-baserade produktmodeller på byggande med platsgjuten betong för att medge optimerad och industrialiserad byggprocess. Två delområden har studerats: a) utvecklande av ett erfarenhetsbibliotek och b) konstruktions- och planeringsstöd för entreprenör och materialleverantör. Rapporten är en sammanfattning av utförlig rapport av Jongeling R: Product Models för Cast in Place Concrete, Avdelningen för Konstruktionsteknik, Teknisk Rapport 2003:01, 104 sid
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- Ghasemi, Yahya, 1982-, et al.
(författare)
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A method for obtaining optimum packing of aggregates for concrete at the onset of flow
- 2017
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Ingår i: Proceedings of the 23rd Nordic Concrete Research Symposium. - Oslo, Norway : Nordic Concrete Federation. - 9788282080569 ; , s. 361-365
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Konferensbidrag (refereegranskat)abstract
- Particle packing models have been studied extensively during past decades and led to development of some complex and relatively accurate predictions of packing of granular materials. While the models are capable of calculating the packing density for different volumetric share of constitutes, the concept of optimum packing remains unclear. The study aims to define optimum packing based on particle packing theory and excess water layer theory .The approach makes it also possible to calculate amount of paste that is required to put a concrete mixture at the onset of flow. Some pilot tests conducted in the laboratory showed good agreement with calculated data.
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