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自来水引起的钠-蒙脱石黏土矿物晶间距增量大于不同矿化度的KCl、NaCl、CaCl2溶液,在水中加入不同类型的盐有助于稳定钠-蒙脱石黏土矿物,抑制黏土矿物晶间距扩展。不同类型、不同矿化度盐溶液引起的钠-蒙脱石黏土矿物晶间距增量不同,比较KCl、NaCl、CaCl23种溶液,KCl溶液引起的晶间距变化量最小,在饱和KCl溶液作用下,钠-蒙脱石黏土的晶间距变化量仅1.32%。钠-蒙脱石与不同类型溶液接触,随溶液加量增加,晶间距增量逐渐减小并逐渐趋于稳定。钠-蒙脱石的水化膨胀量与溶液总加量无直接关系,当黏土矿物浸泡在水溶液中时,晶间距不会随着水的总量增加而无限扩展。钠-蒙脱石与加量相同的不同类型溶液接触时,晶间距随接触时间增加呈复杂指数函数变化,表现出在初期突变增大并很快趋于稳定的特点。
The increment of crystal spacing of sodium-montmorillonite clay minerals by tap water is larger than that of KCl, NaCl and CaCl2 solutions with different degrees of salinity. Adding different types of salts in water can help to stabilize sodium-montmorillonite clay minerals and inhibit clay minerals Pitch expansion. Different types, different salinity of salt solution caused by the sodium-montmorillonite clay crystal spacing increments are different, compare KCl, NaCl, CaCl23 kinds of solutions, KCl solution caused by the smallest changes in the spacing of the crystal, with saturated KCl solution, The variation of the crystal spacing of Na-montmorillonite clay is only 1.32%. Sodium-montmorillonite contact with different types of solution, with the amount of solution increases, the increment of intergranular spacing gradually decreases and gradually stabilized. Sodium-montmorillonite hydration expansion is not directly related to the total amount of solution, when the clay minerals soaked in aqueous solution, the crystal spacing will not be infinitely expanded with the increase of the total amount of water. When sodium-montmorillonite is contacted with different types of solutions with the same dosage, the intergranular spacing changes with complex exponential function with the increase of contact time, which shows that the mutation increases rapidly and tends to be stable quickly.