近年来,我国高速公路及水利工程建设迅速发展,施工的机械化程度也日益提高,以往检测土体施工碾压密度的方法已不能满足快速施工的要求,工程上迫切需要一种快速准确、无环境污染的新检测技术和方法。黄委会水科院研制的新型仪器 SMC—1型声波密度仪填补了 In recent years, the construction of expressways and water conservancy projects in our country has been developing rapidly and the degree of mechanization of construction has also been increasing day by day. In the past, the method of testing the compaction density of soils has failed to meet the requirements of rapid construction. There is an urgent need for a fast, accurate and environment- New pollution detection techniques and methods. The Yellow River Institute of Science developed a new type of instrument SMC-1-type acoustic density meter to fill up