Blar i NTNU Open på forfatter "Bjøntegaard, Øyvind"
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Calibration of material models against TSTM test for crack risk assessment of early-age concrete containing fly ash
Ji, Guomin; Kanstad, Terje; Bjøntegaard, Øyvind (Journal article; Peer reviewed, 2018)Making reliable cracking risk assessment involves experimental testing and advanced modeling of the time- and temperature-dependent behavior of the properties, the restraint conditions of the structure, and the external ... -
Crack risk evaluation of submerged concrete tunnel during hardening phase
Ji, Guomin; Kanstad, Terje; Bjøntegaard, Øyvind (Journal article; Peer reviewed, 2018)Cracking of concrete structures during the hardening phase often seriously compromises not only structure integrity but also durability and long-term service life. Especially for large massive structures, for example, ... -
The cracking risk of hardening concrete exposed to realistic curing temperature regimes and restraint conditions – Experimental investigations of important parameters
Klausen, Anja Birgitta Estensen; Kanstad, Terje; Bjøntegaard, Øyvind (Peer reviewed; Journal article, 2022)Early age cracking in hardening concrete can be evaluated using dedicated calculation methods. Such calculations require a wide selection of input parameters, e.g. autogenous- and thermal deformation, hydration heat ... -
Early age crack assessment of concrete structures Experimental investigation of decisive parameters
Klausen, Anja B. Estensen (Doctoral theses at NTNU;NTNU, 2016:256, Doctoral thesis, 2016)Concrete in the hardening phase is subjected to volume changes caused by thermal dilation and autogenous deformation. If these volume changes are restrained they may lead to cracking and further to functionality-, durability, ... -
Early age crack assessment of concrete structures: Experimental and theoretical approaches
Klausen, Anja Birgitta Estensen; Kanstad, Terje; Bjøntegaard, Øyvind (Chapter, 2017)The present paper contains a brief overview of work performed within the Ph.D. thesis "Crack assessment of concrete structures: experimental investigation of decisive parameters" (2010 – 2016). The main objective of the ... -
The effect of curing temperature on autogenous deformation of fly ash concretes
Klausen, Anja Birgitta Estensen; Kanstad, Terje; Bjøntegaard, Øyvind; Sellevold, Erik Johan (Peer reviewed; Journal article, 2020)For concrete subjected to restrained conditions, autogenous deformation (AD) and thermal dilation (TD) are the main driving forces behind stress development in the hardening phase. Generally, AD in concrete is modelled by ... -
Excavated rock materials from tunnels for sprayed concrete
Luong, Judy Yuen Wah; Aarstad, Kari; De Weerdt, Klaartje; Bjøntegaard, Øyvind (Chapter; 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 ... -
Hardening Concrete Exposed to Realistic Curing Temperature Regimes and Restraint Conditions: Advanced Testing and Design Methodology
Klausen, Anja Birgitta Estensen; Kanstad, Terje; Bjøntegaard, Øyvind (Journal article; Peer reviewed, 2019)Early age cracking (EAC) is a well-known problem area when it comes to concrete structures. The driving forces behind EAC are thermal dilation and autogenous deformation, but EAC is also strongly dependent on material and ... -
International round robin testing of circular FRC slabs
Sandbakk, Sindre; Kanstad, Terje; Bjøntegaard, Øyvind; Vandewalle, Lucie; Parmentier, Benoit (COIN Project report;23, Research report, 2010) -
Numerical modelling of field test for crack risk assessment of early age concrete containing fly ash
Ji, Guomin; Kanstad, Terje; Bjøntegaard, Øyvind (Journal article; Peer reviewed, 2018)The high-strength/high-performance concretes are prone to cracking at early age due to low water/binder ratio. The replacement of cement with mineral additives such as fly ash and blast-furnace slag reduces the hydration ... -
The effect of realistic curing temperature on the strength and E-modulus of concrete
Klausen, Anja Birgitta Estensen; Kanstad, Terje; Bjøntegaard, Øyvind; Sellevold, Erik Johan (Journal article; Peer reviewed, 2018)The strength and E-modulus of concrete are decisive parameters when it comes to ultimate limit state design, serviceability limit state design, and early age crack assessment. The properties of concrete are generally ... -
Utilization of Rock Materials from Tunnelling as Aggregates for Sprayed Concrete
Luong, Judy Yuen Wah (Master thesis, 2017)The concrete industry in Norway, as well as other countries, is facing a great challenge nowadays. The enormous increase in demand for concrete production and the consequential increase in aggregate consumption have resulted ...