A physical properties a nd phase diagram investigation of clay-sand syste m

Many researcher s are interested to stud y physical properties an d phase dia gram of m etallic oxides which are constituent the soils. In our research we decided to use the p revalent clay and sand which available and ma nufactured in Iran to us e directly. It may improve and open new view in the field of applied p hysical chemistry and soil science. Clay soil is hardened when fired o r dried. The y may also have contai ned variable common of water trapped in the mineral structure which is cause polar attraction . In a view of soil scie ntist and c olloid chemist are usuall y preferred t he size of clay between ۱-۲ μm respe ctively.Sievin g ventilation of air during of kiln it has an im portant rule for improving the physical properties of the clay. The melting point of clay, depend to their compo sitions. It seems presents of potassium oxide can lower the melting point temperature. The main composition of sand is SiO۲ , which make an unique tightness of it and enhan ce the melting point of sand. The m icrostructure of different metal oxides by variation temperatures hav e been studied so far and their phase diagrams CaO- MgO,CaO- MgO-SiO۲ and so on, have been reported, in condition of desification, sin teration and crystallization have also been investigated but there is not any report o f this view th at to measure clay and sand system so far [۱-۷].

کلیدواژه ها:

Phase diagram ، Ph ysical properties ، Sand soil ، Clay soil.