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Vurdering av retningslinjer. SINTEF har i denne rapporten vurdert to forslag til retningslinjer for legging av kabler og rør langs riksveg fra hhv. Statens vegvesen og ledningsbransjen. De to forslagene har begge sine styrker og svakheter, og de ulike punktene er detaljert kommentert. Det er også...

Basert på beregningsmetodikken etablert i NS3031:2007 [1] er det laget en detaljert beregningsmodell av Urban Energy i ESP-r [2]. Modellen er benyttet til å vurdere termisk komfort i bygget med de foreslåtte løsninger, samt beregne netto spesifikt energibehov for bygget. Resultatene viser at det vil...

I prosjektet BEST VENT er det sett nærmere på dagens formulering i Klimaveiledning 444 om full døgnkontinuerlig ventilasjon i ett år for nybygg og rehabiliterte bygg. Det har skjedd to viktig endringer siden anbefalingen kom for rundt 30 år siden: i) strengere krav til bruk av lavemitterende...

Avinor har gitt SINTEF i oppdrag å foreta en støykartlegging av Namsos lufthavn etter Miljøverndepartementets retningslinje T-1442/2016. Beregning av støy er utført med NORTIM 4.5 som tar hensyn til topografien ved beregning av lydutbredelse. Det er gjort beregninger for gjennomført trafikk i...

Wood stoves constitute an important component of residential space-heating in cold-climate countries, particularly in Norway, where a substantial proportion of households are equipped with a wood stove.These stoves are used as a primary or supplementary heating source. In Norway, wood stoves often...

Background: Prehospital rewarming is crucial to reduce mortality and improve outcomes in patients with accidental hypothermia. Although international guidelines recommend combining active external rewarming with passive rewarming, the effect of active external rewarming remains unclear. We evaluated...

The primary objective of this report was to find out why calcined marl replacing cement in mortars leads to such a high strength and how it possibly can lead to longer term strength increase after the calcium hydroxide generally thought to be required for pozzolanic reactions has been depleted. The...

Reducing the risk of through-cracking in mass concrete during the hardening phase is mainly a question of reducing the hydration heat and, thus, reducing the temperature-increase in a hardening concrete member restrained against movement. The report deals with on-site curing box tests and gives some...

One of COIN’s overall targets is to increase the residual bending strength towards 15MPa. A working hypothesis has been that the ductility of fibrous concrete increases with decreasing concrete compressive strength due to lower crack load and also lower maximum loads. The objective of the following...

Calcined marl – ordinary "blue" clay containing calcium carbonate – has been shown earlier to be an effective pozzolan in cementitious materials in terms of strength if calcined at the correct temperature. Marl is unsuitable for the clay product industry, and might thus be the high-volume available...

Background A round robin test program to evaluate whether the ASTM-procedure are able to produce consistent results for nominally identical panels tested at different laboratories with different measuring systems has been carried out. The tests are performed at four different laboratories. The four...

Kloriddiffusjonskoeffisienten for betong som er eksponert i marint miljø reduseres over tid på grunn av modning og aldring (tetting av overflatesjiktet) av betongen. Aldringsutviklingen beskrives av α, β og γ β: beskriver reduksjon av potensiell diffusjonskoeffisient (D_p) på grunn av økt modenhet...

The case analysed represents a standard size landscape office room in Oslo climate. The office envelope and system properties are in compliance with the TEK (2007). The study concentrates on the thermal comfort conditions in summer and two cooling systems are considered, one representing an...

This report summarizes the results from a series of experiments carried out in 7 new dilations rigs measuring autogenous deformation in concrete. The intention was to find a relation between autogenous deformation and relative humidity in three different mixes with three different binders. Another...

With the drive towards a greener construction industry, focus has been placed on minimizing the emission of CO₂ from cement clinker production. This led to an increase in the utilization of blended cements in the construction industry. Currently, it is common practice to replace up to ~20 % of the...

The first objective was to find out why a white clinker from previous studies has a higher strength potential than the other 3 clinkers tested in the same study, as well as finding out whether or not it contains other aluminate compounds than C3A. Clinker δ gives higher early strength than the...

SINTEF and NTNU organized a WORKSHOP on moisture in concrete, 6th-7th February 2012 in Trondheim. The workshop was related to and supported by the COIN Focus Areas 3.1 “Crack free concrete structures” and 3.2 “Service life”. The purpose of the workshop was to share information on • available methods...