一、前言三峡大坝工程,需用千万公方的砂料,坝址附近除乐天溪有少量的砂外,均无天然出产,但在坝址两岸有无数的风化砂层,如能将此种风化砂层加以利用,显然是具有极其重大的经济意义,但风化砂层本身结构疏松,含有大量的风化长石及粘土泥渣、云母片块等,因此为了达到在质量上满足于三峡大坝工程所需的砂料,必需进行对风化砂进行加工的研究工作。 I. Preface The Three Gorges Dam project requires tens of millions of square meters of sand material. There is no natural product except Lotte Creek near the dam site. However, there are numerous weathered sand layers on both sides of the dam site. This kind of weathered sand is utilized, which is obviously of great economic significance. However, the weathered sand itself has a loose structure and contains a large amount of weathered feldspar, clay mud and mica pieces. Therefore, in order to meet the requirements of the Three Gorges Dams needed for the project sand, the need for the processing of weathered sand research.