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Uttorkning av komplexa betongkonstruktioner: Uttorkningstider för foggjutning och pågjutning på HD/F
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2014 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Dehydration of complex concrete structures : Dehydration time for joint grouting and grouting on HD/F (English)
Abstract [sv]

Byggandet av dagens sjukhus har blivit allt mer komplext. När det kommer till uppbyggnaden av stomkonstruktionen har kraven för vibrationer ökat. För att säkerställa kraven för stomvibrationer måste pågjutningens tjocklek öka med ca 90 mm från standarden som är ca 40 mm. Att utföra denna extra pågjutning är inte ett problem i sig, utan den extra torktiden som tillkommer. Den extra torktiden är inte det enda problemet. De beräkningsprogram som finns ute på marknaden idag kan inte behandla alla typer av konstruktioner och simuleringar, dock skulle det kunna gå att dela upp simuleringsprocessen för uttorkningen emellan beräkningsprogrammen.

I denna studie så kommer två olika simulering/beräknings program att tillämpas. Beräkningsprogrammen som kommer att användas är TORKA S och WUFI. Torktiderna kommer att räknas fram genom att kombinera dessa program samt titta på tidigare studier gällande detta projekt.

I denna studie har vi valt att ta en närmare titt på hur foggjutningen mellan håldäcken påverkar torktiden för hela delområdet, dvs. foggjutningen och pågjutningen.

Resultaten visar att vct för foggjutningen måste vara betydligt lägre än vct för pågjutningen och att torktiderna varierar beroende på vct. Torktiderna för pågjutningen varierar om mätningar görs över fog eller mitt på håldäcken.

Abstract [en]

Constructions of hospitals today have become more complex than before. As for the construction of the frame structure, the requirements for vibration in the body have increased. To fulfill the requirements for frame vibrations the top coating thickness must be increased with 90 mm ​​from the standard thickness, which is around 40 mm. To perform this extra topping is not the biggest issue. The major problem is the extra drying time that is added in the process. Another large problem is the calculation programs that are available on the market today cannot deal with all types of designs and simulations; however it would be possible to divide the simulation process for the dehydration between different calculation programs.

In this study, two different simulation/calculation programs will be used. The programs that will be applied are TorkaS 3.2 and WUFI Pro. Drying times will be generated by combining these programs and look at previous studies similar to this project.

In this study we have chosen to take a closer look at how joint cast between the slabs affects the drying time for the entire sub-area, which is the joint cast and topping cast.

The results of the w/c-ratio for joint cast must be significantly lower than w/c-ratio for topping and that drying times will vary depending on the w/c-ratio. Drying times for topping will also vary if measurements are made over the joint or middle of the slab.

Place, publisher, year, edition, pages
2014. , 36 p.
Keyword [en]
Wufi, hollow core slabs, joint cast, dehydration, casting, drying times
Keyword [sv]
Wufi, håldäcksbjälklag, foggjutning, uttorkning, pågjutning, torktider
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-149307OAI: oai:DiVA.org:kth-149307DiVA: diva2:738923
External cooperation
Ramböll
Educational program
Bachelor of Science in Engineering - Constructional Engineering and Design
Supervisors
Examiners
Available from: 2014-08-19 Created: 2014-08-19 Last updated: 2014-08-19Bibliographically approved

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