%0 Journal Article
%A SHAO Xiao-mei
%A LI Zhen
%A HAN Wei
%T Application of SEM to the Test on Aggregate Alkali Activity of Fully-graded Long-age Concrete
%D 2015
%R 10.11988/ckyyb.20140220
%J Journal of Yangtze River Scientific Research Institute
%P 153-156
%V 32
%N 9
%X In order to understand  the expansion and deterioration of concrete in macro-and-micro senses,we took the alkali activity of sandstone aggregate of a large hydropower station in China as research background. In consideration of practical engineering demands, we carried out long-age simulation test on fully-graded mass concrete alkali aggregate reaction using SEM (Scanning Electron Microscope) test technology, and in association with the existing assessment system for alkali aggregate reaction, we researched the long-term inhibition of alkali activity. Results suggest that the characteristics of reaction product can be observed evidently by using SEM, the reaction degree can be obtained semi-quantitatively, and the trend of concrete deterioration can be estimated.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20140220