铝矿床底板土是平果铝矿复垦的主要覆土材料 ,但由于其理化性状差 ,用作复垦地的耕作层需要进行土质改良 ,粉煤灰是这类粘质底板土最经济可行的改性材料。通过一系列的试验研究 ,确定了粉煤灰与底板土的最佳配比 ,并考查了土壤改良的实际效果 The basement soil of the aluminum deposit is the main soil covering material for the reclamation of Pingguo mines. However, due to poor physical and chemical properties, the soil layer used for land reclamation needs improvement. The fly ash is the most economical and feasible for this kind of clay base soil Modified materials. Through a series of experimental studies, the optimal ratio of fly ash to base soil was determined, and the actual effect of soil improvement was examined