Abstract
It was found that there was a difference of reactivity between the surface portion and inside portion of super lightweight aggregates (SLA) made of the Yellow River sedimentary soil in the alkali-silica reaction (ASR) test. Moreover, neither harmful expansion was observed as a result of ASR test by Danish method with the concrete specimen using available lightweight aggregates (LA) and SLA. However, the formation of the ASR gel was not observed in SLA while the formation of the ASR gel was observed in the interface of mortar and the aggregate in LA. It was concluded that the alkali silica reactivity of SLA was very low. Therefore, SLA is available enough to actual concrete structures.
