Slitbanebetong för broar: Inventering och inverkan av krympning
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The use of direct mould concrete as material for the surfacing on bridges is an increasingly used coating option. But in order to implement this option at a larger scale, a change in the formula according to “bridge code 2004 part 62.323” for direct mould concrete has to be made. This is because the present formula gives too high volumes of steel fiber. Thus this report will be a part of improving the said formula.In this report the author makes an inventory in which, among others things, the amount of bridges that have been directly molded with concrete as surfacing. The inventory shows in what intervals in both runway length and the area of the surface that is direct moulded as well as where and when these bridges were built. There is also an inventory made of what kind of damage these bridges have been suffering. This is then presented in graphical format in order to get a grip on its scope.Another part of the research made in this report is to study the temperature and relative humidity’s effects on concrete shrinkage. This is done to simulate the concrete moulding in different seasons and locations in the country.The goal is to acquire an understanding on the extent of direct mould concrete usage in Sweden, as well as to find a favorable moulding-environment. If the shrinkage process is slow the grip between the main concrete construction and the surface coating is better, which in turn results into a smaller amount of required steel fibers in the concrete. It also leads to easier processing when moulding, and minimizes the surface roughness of the bridge way.
Place, publisher, year, edition, pages
2012. , 129 p.
Teknik, Direktgjuten slitbetong, inventering, krympning
IdentifiersURN: urn:nbn:se:ltu:diva-52597Local ID: 9b79ddce-a319-42c4-9f31-1c38f2ee30aaOAI: oai:DiVA.org:ltu-52597DiVA: diva2:1025967
Subject / course
Student thesis, at least 30 credits
Civil Engineering, master's level
Validerat; 20120311 (anonymous)2016-10-042016-10-04Bibliographically approved