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研究了粘土在单一碱（Ｎａ２ＣＯ３）盐水溶液和复合碱（Ｎａ２ＣＯ３与ＮａＯＨ的等摩尔混合物）盐水溶液中的膨胀行为，探讨了碱的类型和浓度变化引起粘土膨胀差异的机理。研究结果表明，粘土在碱溶液中的膨胀率随碱浓度的增加先增大后降低；粘土在复合碱溶液中的膨胀性比在单一碱溶液中的小；粘土在碱溶液中的膨胀行为与碱消溶粘土产生Ａｌ３＋的作用有关
The swelling behavior of clay in saline solution of single alkali (Na2CO3) and compound alkali (equimolar mixture of Na2CO3 and NaOH) was studied. The mechanism of the difference of clay swelling caused by the type and concentration of alkali was discussed. The results show that the swelling rate of clay in alkali solution first increases and then decreases with the increase of alkali concentration. The swelling property of clay in complex alkali solution is smaller than that in single alkali solution. The swelling behavior of clay in alkali solution is similar to Alkali-clay dissolution of the role of Al3 +