Browsing SINTEF Open by Author "Justnes, Harald"

Acid Activation of Natural Rocks - A Case Study with Norwegian Anorthosite and Phosphoric Acid

Danner, Tobias; Justnes, Harald (SINTEF; 2021:00335, Research report, 2021)

Norway is rich in natural resources, especially different types of rocks that could potentially serve as raw material for alternative binder concepts like alkali activated binders or magnesium phosphate and magnesium hydroxy ...

Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests

Hemstad, Petter; Zuschlag, Pamela; Kjellemyr, Petter; Lindgård, Jan; Kjellsen, Knut O.; Rønning, Terje; Justnes, Harald; Maciej, Zajac; Haha, Mohsen Ben; Weerdt, Klaartje de (Peer reviewed; Journal article, 2023)

Accelerated testing of alkali silica reaction (ASR) in concrete at elevated temperatures of 38 and 60 °C has an unknown impact on the alkali metal distribution in the cement paste. This paper investigates how the alkali ...

Alkali-reduced Bauxite Residue as Novel SCM

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

Bauxite residue is a major waste stream available in large volumes globally that can cause risks to the surrounding environment (e.g. ecotoxicity) when disposed and stored by conventional methods. There is yet no large-scale ...

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 ...

Alternative binders based on lime and calcined clay

Østnor, Tone Anita; Justnes, Harald (COIN Project report;68, Research report, 2015)

Alternative binders are in this report defined as binders without Portland cement. In this particular project it will be based on calcined clay or fly ash as a source of reactive silica and alumina in combination with lime ...

Aske fra energigjenvinning kan erstatte sement

Engelsen, Christian John; Døssland, Line Teigen; Danner, Tobias; Justnes, Harald; Heyn, Richard H. (Journal article, 2022)

t forskningsprosjekt fra SINTEF viser at aske fra forbrenningsanlegget på Haraldrud har gode egenskaper som sementerstatter. Resultatene åpner for økt sirkulær økonomi i byggenæringen.

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 ...

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)