有机类土比重测定与商榷  

Measurement and Discussion of Specific Gravity for Organic Soils

作　　者：卞素珍 

机构地区：[1]江苏省地质矿产测试应用研究所

出　　处：《江苏地质》1995年第1期46-48,共3页Jiangsu Geology

摘　　要：有机类土比重测定与商榷卞素珍（江苏省地质矿产测试应用研究所，南京，２１００１８）关键词：有机土，有机质，比重测定，工程地质，江苏南京。ＭｅａｓｕｒｅｍｅｎｔａｎｄＤｉｓｃｕｓｓｉｏｎｏｆＳｐｅｃｉｆｉｃＧｒａｖｉｔｙｆｏｒＯｒｇａｎｉｃＳｏｉｌｓ￥Ｂ...The specific gravity of soil particle is an important physical parameter. Its numerical value depends on the ratio of mineral composition and ferromagnesian minerals in soil. The organic soil is characteristic of nonconsolidated sediments, high content of organic matters ,non-regular grain size, longer dry time, high water content and small mass. The measurement of speciflc gravity for the organic soils is different from normal soils.Using a neutral liquid for instance kerosene as medium and utilizing a vacuum exhaust instrument to remove air from soil, the specific gravity could be measured by the specific-gravity bottle method. When preparing samples the dry temperature is 60-80℃ and dry time 12 hr. After measurement the specificgravity of kerosene must be determined to calculate the specific gravity of soil samples. In engineering's soil samples in Nanjing area,the distinguish for organic soils normally include their color, odour and water content. Through the cumulation of measured data for the specific gravity of organic soils, it shows a closely relationship between numerical value of specific gravity and water content, moisture density.

关 键 词：有机类土 比重 测定 土粒 土壤比重 

分 类 号：S152.5[农业科学—土壤学]