Browsing NTNU Open by Author "Fournier, Benoit"
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Determination of the pH and the free alkali metal content in the pore solution of concrete: Review and experimental comparison
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; Duchesne, Josée; Fournier, Benoit; De Weerdt, Klaartje (Journal article; Peer reviewed, 2017)The durability of concrete is affected by the pH of its pore solution, which is linked to the free alkali metal content. This paper starts with a literature review of methods for determining the pH and/or the free alkali ... -
Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and μXRF
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)Considerable leaching of alkali metals was documented, both in concrete samples exposed to accelerated laboratory testing and field samples. CWE allowed to quantitatively determine the free alkali metal profiles as a ... -
Outdoor exposure site testing for preventing Alkali-Aggregate Reactivity in concrete – a review
Fournier, Benoit; Lindgård, Jan; Wigum, Børge Johannes; Borchers, Ingmar (Journal article; Peer reviewed, 2018)Alkali-silica reaction (ASR) is a deleterious chemical reaction affecting the durability and service life of concrete structures worldwide. Specifications and recommendations were produced in many countries to ensure that ...