The required water in the normal constituency of cement paste will be determined by testing penetrability of the cement paste with different water contents. 通过试验不同含水量水泥净浆的穿透性，以确定水泥标准稠度净浆中所需加人的水量。
The reason of air distribution being asymmetric is that the penetrability of the field soil is not uniform. 现场曝气存在气流分布不对称现象，是由于土壤介质的渗透性不均匀所致。
