The main orebody of Huashupo Copper Deposit in Tongling occurs in silica horizon of Qixia Group of Lower Permian System, while minor ores controlled by strata occur in Gufeng Group.
铜陵花树坡铜矿床主矿体赋存于二叠系下统栖霞组硅质层内，次要矿体赋存于孤峰组内，受层位控制。
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Among which the experiment group using 50% fly ash, 10% silica fume instead of ordinary Portland cement shows rather better durability either in standard curing or the accelerated aging experiment.
The influences of hydrophobic group content on the stability of the silica sols and the surface wettability and vapour stability of the silica membranes were investigated.