• Behaviour and Capacity of Lightweight Aggregate Concrete Beams with and without Shear Reinforcement 

      Zivkovic, Jelena; Øverli, Jan Arve (Journal article; Peer reviewed, 2017)
      The main disadvantages of lightweight aggregate compared with normal weight concrete are its brittleness at the material level in compression and uncontrolled crack propagation. This experimental investigation consists of ...
    • Clays as SCM – Reactivity of Uncalcined Kaolinite and Bentonite, and Impact on Phase Assemblage and Strength Development of PC Mortars 

      Geiker, Mette Rica; Gallucci, Emmanuel (Journal article; Peer reviewed, 2019)
      The impact of substitution of cement paste with uncalcined clay (bentonite and kaolinite) in the range of 5% by volume of paste on the development of hydration and properties of mortar was investigated. Two issues were ...
    • Concrete-Ice Abrasion: Laboratory Studies using a Sawn Concrete Surface 

      Shamsutdinova, Guzel; Hendriks, Max; Jacobsen, Stefan (Conference object; Journal article; Peer reviewed, 2017)
      Concrete-ice abrasion is a surface degradation mechanism due to ice-structure interaction especially relevant for concrete gravity-based structures in the Arctic offshore. Experiment is the main evaluation method for ...
    • Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater 

      Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander (Chapter; Conference object; Peer reviewed, 2017)
      Resistance to chloride ingress of ten different binders was investigated. Most of the binders were prepared with 35% substitution of a new clinker by limestone filler, calcined clay, burnt shale and/or siliceous fly ash. ...
    • Effect of AEA-SP Dosage Sequence on Air Entrainment in FA Concrete 

      Shpak, Andrei; Jacobsen, Stefan (Journal article; Peer reviewed, 2019)
      Laboratory measurements show that varying the dosage sequence of air-entraining agent and co-polymer in the mix (SP added before, after or together with AEA) greatly affects air entrainment in fresh and hardened fly ash ...
    • Excavated rock materials from tunnels for sprayed concrete 

      Luong, Judy Yuen Wah; Aarstad, Kari; De Weerdt, Klaartje; Bjøntegaard, Øyvind (Chapter; Conference object; Peer reviewed, 2017)
      Sand extracted from natural resources is widely used in concrete production nowadays. The increase in demand for concrete production has resulted in shortage of natural sand resources, especially in terms of suitable ...
    • Failure of Lightweight Aggregate Concrete in Compression under Stress Gradients 

      Zivkovic, Jelena; Øverli, Jan Arve (Journal article; Peer reviewed, 2019)
      The objective of this experiment is to investigate the behaviour of lightweight aggregate concrete (LWAC) under compression and with stress gradients. Experimental program contained three sets of LWAC which were used for ...
    • Filler and Water Reducer Effects on Sedimentation, Bleeding and Zeta-Potential of Cement Paste 

      Peng, Ya; Pedersen, Bård; Ng, Serina; De Weerdt, Klaartje; Jacobsen, Stefan (Journal article; Peer reviewed, 2018)
      Bleeding and sedimentation quantify the stability of fresh cement paste, whereas the addition of fillers and water reducers affect the stability. The effect of various types of fillers and water reducers was investigated ...
    • Frost Salt Scaling of Concrete 

      Wahlbom, David; Fridh, Katja; Feng-Chong, Teddy; Dangla, Patrick; Geiker, Mette Rica; Jacobsen, Stefan; Skocek, Jan; Huy Vu, Quoc (Conference object; Journal article; Peer reviewed, 2017)
      The project will address the mechanism(s) of deterioration in frost salt scaling (FSS) including the potentially protective effect of entrained air voids and the performance of low-clinker blends. Frost deterioration of ...
    • Impact of Accelerated Carbonation on Microstructure and Phase Assemblage 

      Belda Revert, Andres; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)
      The paper summarizes preliminary results on characterization of the microstructure and phase assemblage of mortar and concrete samples containing Portland and Portland -fly ash cement carbonated at ...
    • Investigation of the products of the dolomite reaction in Portland cement pastes 

      Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje (Chapter; Conference object; Peer reviewed, 2017)
      The formation of potentially deleterious reaction products from the reaction of dolomite fines in Portland cement pastes was investigated. It was shown that the reaction of dolomite fines did not follow the commonly accepted ...
    • Long-term Influence of Concrete Surface and Crack Orientation on Self-healing and Ingress in Cracks – Field Observations 

      Danner, Tobias; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)
      This paper presents results from investigations on the long-term influence of concrete surface and crack orientation on ingress in cracks. Five reinforced concrete structures from Norway exposed to either de-icing salts ...
    • Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures 

      Hornbostel, Karla; Danner, Tobias; Geiker, Mette Rica (Peer reviewed; Journal article, 2020)
      Several inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as ...
    • Review of Sprayability of Wet Sprayed Concrete 

      Trussell, Nicholas Henry; Jacobsen, Stefan (Peer reviewed; Journal article, 2020)
      Wet sprayed concrete quality is affected by more production factors than cast concrete, particularly due to the propulsion through the nozzle and the flash set caused by the set accelerator. Practitioners often use the ...
    • Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress 

      Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander (Journal article; Peer reviewed, 2017)
      This paper reports an initial screening of potential new binders for concrete with reduced CO2- emission. Mortars cured saturated for 90 days are compared with regard to a) compressive strength of mortars with similar ...
    • SEM-EDS analysis of products formed under natural and accelerated carbonation of concrete with CEM I, CEM II/B-M and CEM II/B-V 

      Revert, Andres Belda; De Weerdt, Klaartje; Geiker, Mette Rica; Hjorth Jakobsen, Ulla (Chapter; Conference object; Peer reviewed, 2017)
      Carbonation resistance of concrete is usually tested under accelerated conditions, i.e. by elevating the CO2 concentration compared to natural conditions and keeping the RH close to 60%. However, it is not clear if these ...
    • The Particle-Matrix model: limitations and further improvements needed 

      Cepuritis, Rolands; Jacobsen, Stefan; Spangenberg, Jon (Conference object; Journal article; Peer reviewed, 2017)
      According to the Particle-Matrix Model (PMM) philosophy, the workability of concrete depends on the properties of two phases and the volumetric ratio between them: the fluid matrix phase (≤ 0.125 mm) and the solid particle ...
    • Towards the Understanding of the pH Dependency of the Chloride Binding of Portland Cement Pastes 

      Machner, Alisa; Hemstad, Petter; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)
      Hydrated Portland cement paste exposed to a NaCl solution was acidified by adding HCl in small steps, gradually lowering the pH. The chloride binding of the cement paste changed as a function of the pH. For the range of ...