Blar i Publikasjoner fra CRIStin på tidsskrift "Cement and Concrete Research"
Viser treff 1-12 av 12
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Alkali-silica reaction (ASR)-performance testing: Influence of specimen pre-treatment, exposure conditions and prism size on alkali leaching and prism expansion
(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
(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 ... -
Alkali–silica reactions (ASR): Literature review on parameters influencing laboratory performance testing
(Journal article; Peer reviewed, 2012)Utilisation of potentially alkali–silica reactive aggregates requires reliable performance tests to evaluate the alkali–silica reactivity of various aggregate combinations, including their alkali threshold dependence on ... -
Characterization of amorphous and crystalline ASR products formed in concrete aggregates
(Peer reviewed; Journal article, 2020)Amorphous and crystalline alkali silica reaction (ASR) products formed in aggregates of two different concrete mixtures exposed to the concrete prim test both at 38 °C and 60 °C have been analysed by scanning electron ... -
Determining the free alkali metal content in concrete – Case study of an ASR-affected dam
(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 ... -
Effect of leaching on the composition of hydration phases during chloride exposure of mortar
(Peer reviewed; Journal article, 2022)Mortar specimens were exposed to either a 3% NaCl solution or a 3% NaCl+KOH solution for up to 180 days. Exposure to the NaCl solution provoked much more leaching than the NaCl+KOH exposure. Leaching strongly impacted the ... -
On the effect of calcium lignosulfonate on the rheology and setting time of cement paste
(Journal article; Peer reviewed, 2017)The effect of softwood calcium lignosulfonate, LSs, on the rheology and setting time of cement paste has been investigated. Two Portland cements with different surface area and C3A content were used. The lignosulfonate was ... -
On the mechanisms of consumption of calcium lignosulfonate by cement paste
(Journal article; Peer reviewed, 2017)The aim of this paper is to assess the mechanisms of consumption of softwood calcium lignosulfonate (LSs) by cement paste. The LSs consumption by two different cements (CX and ANL) and two reference materials (CaCO3 and ... -
Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends
(Journal article; Peer reviewed, 2017)Chloride binding is investigated for Portland cement–metakaolin–limestone pastes exposed to CaCl2 and NaCl solutions. The phase assemblages and the amount of Friedel's salt are evaluated using TGA, XRD and thermodynamic ... -
Structure, hydration, and chloride ingress in C-S-H: Insight from DFT calculations
(Peer reviewed; Journal article, 2020)The structure of Calcium-Silicate-Hydrate (C-S-H) and the effect of variations in its water content have been investigated using density functional theory (DFT) calculations. Trends for calculated densities as a function ... -
The effect of calcium lignosulfonate on ettringite formation in cement paste
(Journal article; Peer reviewed, 2018)The effect of a softwood calcium lignosulfonate, LSs, on the ettringite formed in cement paste was investigated. Two Portland cements, mainly differing in surface area and C3A content, were used. The effect of LSs addition ... -
The EU "PARTNER" Project - European standard tests to prevent alkali reactions in aggregates: Final results and recommendations
(Journal article; Peer reviewed, 2010)This paper presents the main findings in the EU PARTNER Project (2002–2006) providing the basis for a unified European test approach for evaluating the potential alkali-reactivity of aggregates. The project evaluated the ...