关键词: 双掺技术;粉煤灰;EDTA滴定;配合比分析

Abstract: A fast,accurate and convenient method to analyse the mix proportion of high performance concrete with double mixing fly ash-titrating the Ca2+ content by EDTA was introduced.Through this way,the conventional analysis method of the mix proportion in concrete mixture is improved and perfected and the problem in the construction of large-scale brige that the fly ash content in concrete mixture must be strictly controlled was solved.Concrete mixture in the bearing platform of a large river-spinning bridge under construction to verify the means for analysing the mix proportion of high performance concrete with double mixing fly ash was selected.

Key words: double mixing technology;fly ash;EDTA titration;mixture ratio analysis