Study on the method of alkali aggregate reaction test and its application
YAO Lijun
Abstract：Concrete expansion,cracking and even damage caused by alkali aggregate reaction has aroused widespread attention in the world,the current alkali activity test methods of most countries are three kinds which are petrographic method,sol-gel expansion method and length measurement. These methods played a positive role in ensuring the durability of concrete,but has shortcomings. In this paper,the reliability of two kinds of alkali aggregate test methods are studied. The results showed that ASTM C1260(accelerated mortar bar method)in the determination of alkali aggregate is too strict,ASTM C586 test method for potential alkali reactivity of carbonate aggregate(rock column method),the reliability and maneuverability of the test cylinder is not as good as the prismatic specimen. The research results are applied to the evaluation of alkali activity of aggregate in Shanghai constructions,high speed railway and nuclear power project,which is beneficial to take positive preventive measures and avoid loss of alkali aggregate damage.
Keywords：alkali activitytest methodlength measuring methodreliability
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 60-63 )