Microstructure and Behavior of Allophane

火山灰土的物理和工程性质的特殊性归因于透闪石的性质和微结构。为此，对尿布悬浮液的微观结构和行为进行了研究。研究结果如下：1.研究结果如下。尿布风干过程中粘度、浊度及微观结构的变化。(1)尿布混悬剂在中性和碱性条件下风干后，其表面物理化学性质发生轻微变化，对其分散性有很大影响。(2)风干后火山灰土的物理性质和工程性质的变化被认为是在自然土壤条件(pH值约为6)下尿磷脂的聚集所致。(3)电子显微镜检查证实了上述事实。游离倍半氧化物对尿囊素混悬剂分散性的影响。(1)非脱色尿布在碱性条件下不分散的原因不能用颗粒净电荷来解释。(2)认为等电点的升高、铝聚合物的直接相互作用以及不透光片表面电荷分布的不均一性是造成这一现象的原因。(3)铝是一种比铁更活跃的土壤絮凝剂。

The peculiarity of physical and engineering properties of volcanic ash soil are attributed to the character of allophane and it's microstructure. Therefore, investigation was made on the microstructure and behavior of allophane suspension. The results are as followes.1. Changes of viscosity, turbidity, and microstructure of allophane by air-drying. (1) The dispersivity of allophane suspension is largely affected by the slight change of physico-chemical properties on allophane surface by air-drying under the neutral and alkaline suspension. (2) Nevertheless, the change of the physical and engineering properties of volcanic ash soil by air-drying is considered to be caused by the aggregation of allophane under the natural soil condition (about pH 6). (3)The fact mentioned above was confirmed by the electron microscopic examination.2. The influence of free sesquioxide on the dispersivity of allophane suspension. (1) The season why the non-defferated allophane does not disperse under the alkaline condition cannot be explained by the net particle charge. (2) And the phenomenon was considered to be caused by the rise of isoelectric point, direct interactive function of aluminum polymer, and the heterogenenity of the charge distribution on the allophane surface. (3) Aluminum is considered to be more active agent than iron on the soil flocculation.