2012, `Modeling of alkali- silica reaction in concrete: A review', Frontiers of Structural and Civil Engineering, vol. 6, no. 1, pp. 1-18.Pan J W, Feng Y T, Wang J T, et al. Modeling of alkali-silica reaction in concrete: A review. Front Struct Civil Eng, 2012, 6: 1–18...
ASR is caused by a reaction between the hydroxyl ions in the alkaline cement pore solution in the concrete and reactive forms of silica in the aggregate (eg: chert, quartzite, opal, strained quartz crystals). A gel is produced, which increases in volume by taking up water and so exerts an...
Alkali-silica reaction of concrete containing glass - Interaction with reactive aggregates. In: 2005 international congress - global construction: ultimate concrete opportunities, July 5, 2005-July 7, 2005, Dundee, Scotland, United Kingdom: Thomas Telford Services Ltd; 2005....
Glass aggregateIn this study, the strength and alkali-silica reaction (ASR) of concrete by incorporating pretreated soda-lime glass particles as fine aggregates were investigated. The glass aggregates were pretreated with three different solutions: Ca(OH)2, NaOH, and a mixture of Ca(OH)2 and ...
This work involves research on the use of fly ash to mitigate alkali-silica reaction (ASR) in concrete made with recycled concrete aggregate (RCA) that comes from concrete with a known ASR history. Modified ASTM C 1260 and C 1567 with different aggregate grading showed that a 25% cement sub...
alkali-silica reactionconcreteThe partial replacement of Portland cement 〈 pc 〉 by pulverized fuel ash 〈 pfa 〉 in a series of potentially reactive concretes significantly reduced expansion due to alkali-silica reaction 〈 asr 〉 in high alkali mixes, whereas, in marginally reactive concretes ...
silicate or sodium carbonate ABFSC binder incorporating either an innocuous control aggregate, an aggregate that is known to be reactive by way of ASR or ACR in ordinary Portland cement (OPC) concrete or an aggregate that contains reactive silica although a good service record has been exhibited....
Structures affected by Alkali-Silica Reaction (ASR) include large massive concrete dams and bridges, which are considered essential for the infrastructure system, and not easily replaceable. The main feature of this reaction is the creation of a hydrophobic expansive gel which causes internal damage ...
Expansion measurements were carried out on 4 cm x 4 cm x 16 cm concrete prisms made with precambrian greywacke, quartz-porphyry, opaline sandstone, Rhine gravel and Duran glass as aggregates, and the microstructures were examined, in order to assess the alkali/silica reaction. As expected, the...
The assessment of concrete structures affected by alkali-silica reaction (ASR) is a complex problem due to the multiscale nature of this long-term phenomenon. The reaction starts within the concrete constituents with the formation of an ... R Esposito 被引量: 10发表: 2016年 Development of Al...