从水分转化特征研究固化淤泥的SWCC

Analysis of SWCC for Solidified Dredged Material from Water Transfer Characteristics

对不同初始状态的淤泥进行固化处理,测定固化淤泥的SWCC及转化到水化产物中的吸着水增量ΔmBW和矿物水增量ΔmHW,从土中水分转化特征研究了固化淤泥的SWCC。结果表明:同一含水率的淤泥固化处理后,进气值AEV随着ΔmBW和ΔmHW的增大而增大,而干燥率随着ΔmBW和ΔmHW的增大而减小;等量的ΔmHW对改变AEV和干燥率的贡献较大,ΔmBW增大到一定量时其影响作用才开始显现;在固化淤泥的工程使用过程中,即使ΔmBW和ΔmHW保持不变,淤泥也可能会出现收缩现象。

Dredged material with different initial states was used to apply cement based solidification, soil water characteristic curve（SWCC） of solidified dredged material and increments of hydration water （△mHW ） and bound water （△mEW ） transferred to cement hydrationresultants were measured. Analysis of S WCC for solidified dredged material from water transfer characteristics was conducted. The resultsshow that air-enter value （ AEV） of the solidified dredged material increases with increasing △mHW and △mBW , while gradient of drying curvedecreases with increasing △mHW and △BW . The same amount of △mHW makes a greater contribution to the changes of and gradient ofdrying curve. On the other hand, the effects of △BW evidently begin to emerge when the content increase to certain amount. Solidifieddredged material may shrink when it is used in engineering practice even if △mHW and △mBW remain the same.