structured or natural clay

Hi I am looking for some suitable reference to compare a structured clay and natural clay.As I realize,this two concept(natural and structured clay) are slightly different.Would you help me,either by introducing a relevant reference or describing it yourself. Thank you

Asked 12/12/2011 01:03, updated: 31/07/2019 18:22

• Amir Amini
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Amir Amini