Abstract：In order to effectively prevent the Alkali-aggregate reaction of a concrete structure, the sand and stone used in concrete from different regions were collected by a river system or a mountain system in Henan province, and a rapid mortar bar method or a mortar length method was used to test their Alkali-Silicate reactions according to code JGJ52—2006 of China. The test showed that the Alkaline activity of stone are up to a standard level, and the Alkaline activity of sand in most regions are up to a standard level, but some regions are opposite. Moreover, a suppression method on sand ASR by mixing fly ash was studied, and it was pointed out that the best effect optimal dosage of fly ash is 30%. These results may provide a reference for the selection of the mixture ratio of concrete in this region.

Keyword：Henan province;concrete aggregate;Alkali-Silicate reaction;