カオリナイト-非晶質水酸化鉄複合体のコンシステンシー限界と粒子間相互作用
1988 年 28 巻 2 号 p. 30-37
詳細
1988 年 28 巻 2 号 p. 30-37
The paste of kaolinite-amorhous iron hydroxide complexes initially prepared at pH3.0 and 9.5 were brought to equilibrium at different pH values of pH3-10. The electron micrographs showed that association between iron hydroxides and kaolinite particles in the complexes at a given pH value was affected by the initial pH of the complexes. Liquid and plastic limits for the paste of the complexes have been examined as a function of pH. The complexes prepared initially at pH3.0 and 9.5 both gave higher liquid and plastic limits than kaolinite in the whole pH range, and the amorphous iron hydroxide in the complexes prepared at pH9.5 were more effective in enhancing the liquid and plastic limits. The results are discussed in terms of the charge characterisics of the amorphous iron hydroxide and its association with kaolinite by means of electron microscopy and zeta potential determination.
