expansive clay

• 膨胀性粘土

expansive clay的用法和样例：

例句

1. The lack of fine fractions in the expanded clay necessitates the addition of other aggregates.
   膨胀性粘土缺乏细料部分，故必须添加其它骨料。
2. Commercial bentonite ores vary widely in amount and quality of the swelling clay, sodium montmorillonite.
   商业用膨润土矿中的膨胀性粘土，钠蒙脱石在数量和质量上变化很大。