alkali-aggregate reaction


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alkali-aggregate reaction

[′al·kə‚lī ′ag·rə·gət rē′ak·shən]
(chemistry)
The chemical reaction of an aggregate with the alkali in a cement, resulting in a weakening of the concrete.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

alkali-aggregate reaction

A chemical reaction in mortar or concrete between alkalies from portland cement or other sources and certain constituents of some aggregates; under certain conditions, deleterious expansion of the concrete or mortar may result.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Godart, "Eliminating alkali-aggregate reaction from long service structures," in Proceedings of the 14th International Conference on alkali-aggregate Reactivity in Concrete, T.
[8] RILEM Technical Committee 219-ACS, "RILEM recommendations for the prevention of damage by alkali-aggregate reactions in new concrete structures," in RILEM State-of-the-Art Report, P.
Residual Capability of Alkali Binding by Hydrated Pozzolanic Cements in Long-Service Concrete Structures
For the evaluation tests of the alkali-aggregate reaction, prismatic samples of 25 x 25 x 250 cm were produced for each type of compound.
Tests of the Alkali-Aggregate Reaction. The average results of the three measurements and the respective standard deviations of the corresponding measurements obtained from the alkali-silica reaction test are shown in Figure 4.
Durability of Mortar Made with Fine Glass Powdered Particles
Advanced Seminar on Alkali-Aggregate Reaction. Queen Mary and Westfield College, University of London, 1990, p.
Testing alkali-reactivity of selected concrete aggregates
Alkali-Aggregate Reaction. As well known, the coexistence of reactive aggregates, alkali, and water is prerequisite to the initiation of alkali-aggregate reaction (AAR) [14].
Alkali-Aggregate Reaction. Table 2 shows chemical composition of cement used for the structure.
Research on deterioration mechanism of concrete materials in an actual structure
Recent developments in the instrumentation make it possible to use Raman spectroscopy as a tool for identification of cement phases including different polymorphic and crystalline forms, investigation of cement hydration, admixtures, concrete-polymer and alkali-aggregate reactions, and concrete carbonation.
Microstructure of interfacial transition zone between PET fibres and cement paste
On the aar susceptibility of granitic and quartzitic aggregates in view of petrographic characteristics and accelerated testing, in 14th International Conference on Alkali-Aggregate Reactions in Concrete, 20- 25 May 2012, Austin, Texas, USA.
Reclassification of alkali aggregate reaction, in 14th International Conference on Alkali-Aggregate Reactions in Concrete, 20-25 May 2012, Austin, Texas, USA.
Lithuanian quarry aggregates concrete effects of alkaline corrosion tests/ Lietuvos karjeru uzpildu poveikio betono sarminei korozijai tyrimai

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