粉煤灰混凝土配合比设计发现，随胶水比（灰水比）增大，混凝土强度比按混凝土强度公式（鲍罗米公式）计算得到的强度有加速增大的趋势。为充分利用胶凝材料的强度，提出按水灰比修正过的鲍罗米公式进行粉煤灰混凝土配合比设计，同时提出60 d 粉煤灰混凝土强度公式。并举例指出该方法应用时应注意的问题。%In the design of fly-ash concrete mix proportion ,it is found that its strength would show the acceleratively in-creasing trend than that calculated according to the concrete strength formula (Bowromi formula)with the increase of B/W (C/W) .In order to utilize the strength of cemented materials ,Bowromi formula after correction according to W/C was put forward to carry out the design of the flyash concrete mix proportion ,simultaneously ,the strength formula for 60 d flyash concrete was put forward ,and some related problems in the application of the method were pointed out with examples .
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