Browsing SINTEF Open by Author "Justnes, Harald"

Alkali-silica reaction (ASR)-performance testing: Influence of specimen pre-treatment, exposure conditions and prism size on alkali leaching and prism expansion

Lindgård, Jan; Thomas, Michael D.A.; Sellevold, Erik Johan; Pedersen, Bård; Andiç-Çakır, Özge; Justnes, Harald; Rønning, Terje F. (Journal article; Peer reviewed, 2013)

Whether or not concrete prism tests developed for assessment of alkali-silica reactivity of aggregates might be suitable for general ASR performance testing of concrete has been evaluated. This paper discusses how variations ...

Alkali–silica reaction (ASR)—performance testing: Influence of specimen pre-treatment, exposure conditions and prism size on concrete porosity, moisture state and transport properties

Lindgård, Jan; Sellevold, Erik Johan; Thomas, Michael D.A.; Pedersen, Bård; Justnes, Harald; Rønning, Terje F. (Journal article; Peer reviewed, 2013)

Abstract Whether or not concrete prism tests (CPTs) developed for assessment of alkali-silica reactivity of aggregates might be suitable for general ASR performance testing of concrete has been evaluated. This paper ...

Bauxite Residue as Supplementary Cementitious Material – Efforts to Reduce the Amount of Soluble Sodium

Danner, Tobias; Justnes, Harald (Peer reviewed; Journal article, 2020)

This study investigates the feasibility of using bauxite residue (BR) as supplementary cementitious material (SCM) for the cement and concrete industry. It is shown from pastes of BR and calcium hydroxide, that BR is highly ...

Betong i bygninger - konsekvenser for inneklima. Forprosjekt

Blom, Peter; Justnes, Harald; Levy, Finn (Prosjektrapport (Norges Byggforskningsinstitutt);193, Research report, 1996)

Calcareous smectite clay as a pozzolanic alternative to kaolin

Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2019)

The hydration of cement pastes with addition of a kaolinite rich clay (Clay A) and a calcareous smectite rich clay (Clay B) was investigated with isothermal calorimetry, in-situ XRD, PXRD, TGA and EPMA. Portland cement was ...

Changes in the phase assemblage of concrete exposed to sea water

De Weerdt, Klaartje; Justnes, Harald; Geiker, Mette Rica (Journal article; Peer reviewed, 2014)

In the present study the phase changes in an ordinary concrete standing for 10 years in a tidal zone were investigated with a range of techniques. From the exposed surface and inwards different zones had formed. SEM–EDS ...

Characterisation of calcined raw clays suitable as supplementary cementitious materials

Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2018)

The potential use of two raw clays (Clay A: kaolin; Clay B: calcareous montmorillonite) as supplementary cementitious material (SCM) in blended cements was investigated. Cement replacement in mortars by 20% calcined Clay ...

Characterisation of calcined raw clays suitable as supplementary cementitious materials

Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2018)

The potential use of two raw clays (Clay A: kaolin; Clay B: calcareous montmorillonite) as supplementary cementitious material (SCM) in blended cements was investigated. Cement replacement in mortars by 20% calcined Clay ...

Characterization of cement types used for rock injection

Skjølsvold, Ola; Justnes, Harald (Conference object; Peer reviewed, 2016)

This paper is a part of the research project “True Improvement in Grouting High pressure Technology for tunneling (TIGHT)" financed by the Research Council of Norway (project no. 236676/O30), in cooperation with Statens ...

Characterization of cements for injection

Justnes, Harald; Skjølsvold, Ola (Chapter, 2017)

The three most common cement s for rock injection in Norway were characterized in terms of grout flow properties, stability and initial set for w/c = 1.2, 1.0, 0.8 and 0.6 at 8 and 20°C. The fineness was characterized by ...

Durability of mortar with calcined marl as pozzolan 2 year results : FA 1 Environmentally friendly concrete structures : SP 1.1 Binders with low emission and reduced consumption

Østnor, Tone Anita; Justnes, Harald (COIN Project report;50, Research report, 2014)

Durability of mortar with calcined marl as pozzolan : FA 1 Environmentally friendly concrete : SP 1.1 Low carbon-footprint binder systems

Østnor, Tone Anita; Justnes, Harald (COIN Project report;49, Research report, 2013)

Durable Aluminium Reinforced Environmentally-friendly Concrete Construction – DARE2C

Justnes, Harald (Journal article; Peer reviewed, 2017)

A new concept is described for low pH concrete that can allow reinforcement with aluminium metal rods or fibres. In regular concrete the high pH will after short while lead to substantial amounts of hydrogen gas evolution. ...

Environmentally Sound Management of Hazardous and Industrial Wastes in Cement Kilns - Waste as Alternative Raw Materials

Justnes, Harald; Engelsen, Christian John (SINTEF report;SBF IN A07322, Research report, 2007)

Fibre reinforced lightweight aggregates

Bernhardt, Markus; Tellesbø, Hilde; Justnes, Harald; Wiik, Kjell (Journal article; Peer reviewed, 2014)

Carbon steel fibre reinforced lightweight aggregates (LWA) were produced in a pilot scale rotary kiln. Narrow size fractions as well as not-sieved (asreceived) material were investigated according to European standards ...

Low porosity through optimized particle packing of concrete matrix. COIN P1 Advanced cementing materials and admixtures : SP 1.5 Low porosity/ permeability

Justnes, Harald (COIN Project report;13, Research report, 2009)

Low water permeability through hydrophobicity : COIN Project P1 advanced cementing materials : SP 1.5 F Low porosity / permeability

Justnes, Harald (COIN Project report;1, Research report, 2009)

The durability and aesthetic appearance of concrete may be improved by the addition of hydrophobizing agents as a consequence of reduced water permeability. Hydrophobizing agents lead to less water absorption at the same ...