Browsing NTNU Open by Author "Plusquellec, Gilles"
Now showing items 1-6 of 6
-
Alkali - Silica Reactions in Concrete Dams - Alkali Leaching in the Votna Dam
Vurucu, Havvagul (Master thesis, 2016)Alkali - silica reaction (ASR) is a common durability problem for concrete. There are three conditions that need to be fulfilled for the reaction to occur: sufficient moisture, alkali reactive aggregates and high alkali ... -
Cold water extraction (CWE). Procedure for the determination of the alkali content and pore solution composition
Plusquellec, Gilles; De Weerdt, Klaartje (Research report, 2017)This document describes the cold water extraction (CWE) procedure which allows to determine the free alkali content of hydrated cement paste, mortar or concrete. The calculation of the pH using the thermodynamic modelling ... -
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 content in ASR performance-tested concrete
Kermit, Peter Holiman (Master thesis, 2017)Alkali silica reation (ASR) is a common deterioration mechanism of concrete. During ASR, reactive aggregate containing silicon oxide (SiO2) can react with the alkaline fluid in the concrete pores. To test whether a concrete ... -
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 ... -
Determining the free alkali metal content in concrete – Case study of an ASR-affected dam
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)In concrete affected by alkali–silica reaction (ASR), aggregates react in the high pH environment and cause deleterious expansion and cracking of the concrete. Leaching of alkali metals from the concrete might therefore ...