alkali-silica reaction


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alkali-silica reaction

In portland cement, the reaction between the alkalies and particular siliceous rocks and/or minerals which are present in some aggregates; may result in abnormal expansion and cracking of concrete under service conditions.
References in periodicals archive ?
Alkali-silica reaction in concrete-Background to the guidance notes.
Multi-laboratory study of the accelerated mortar bar test (ASTM C 1260) for alkali-silica reaction.
Report on the diagnosis, prognosis, and mitigation of Alkali-Silica Reaction (ASR) in transportation structures.
BACKGROUND OF ALKALI-SILICA REACTION There has been enormous volume of reported literature about the background theory and cases of Alkali-Silica Reaction in concrete structures after its discovery by Stanton in California, USA in 1940.
2000, The effect of metakaolin on alkali-silica reaction in concrete, Cement and Concrete Research.
ABSTRACT: Concrete aggregates derived from river bed materials of many of the streams originating from the NW-Himalayan region and draining into Pakistan are found reactive in terms of Alkali-Silica Reaction (ASR).
Chemistry of alkali-silica reaction and testing of aggregates, Cement and Concrete Composites 27(7-8): 788-795.
Using methods from ASTM C 1260 Multi-Laboratory Study of the Accelerated Mortar Bar Test for Alkali-Silica Reaction, staff at the Mannvit Engineering-housed facility prepared specimens from control (100% portland cement) and ash (5% portland cement substitution) mixes.
Limited research has been carried out to investigate the effect of POFA on concrete's resistance to alkali-silica reaction.
Delayed ettringite formation (DEF) and alkali-silica reaction (ASR) represent two areas of study.
Keywords: alkali-silica reaction, test methods, SEM.
The gel created during the alkali-silica reaction swells and exerts expansive stresses that can crack concrete in highways, pavements, bridges, and dam walls.