合理设计粉煤灰砼配合比王昌义（南京水利科学研究院，２１００２９）１前言设计粉煤灰砼配合比，目前一般用等量取代法或超量取代法，按常规步骤设计出普通砼配合比，再根据粉煤灰取代量、超量取代系数，算出粉煤灰用量，对普通砼配比略作调整后，得出粉煤灰砼配合比。这... Reasonable design of fly ash ash mix ratio Wang Changyi (Nanjing Hydraulic Research Institute, 210029) 1 Introduction Design of fly ash ash mix ratio, currently using the same amount of substitution method or excess substitution method, according to conventional procedures to design a common cesium mix ratio Then, based on the replacement amount of fly ash and the excess substitution coefficient, the amount of fly ash was calculated. After slight adjustments were made to the average ratio of ash, the mix ratio of fly ash and ash was obtained. This...