Thermophysical properties of samples made of sapropel and clayey soil

Abstract

The article deals with the dependencies of density of samples made of pure clayey soil, sapropel and clayey soil mixture on formation pressure; it also deals with the dependency of heat conductivity and absorption capacity of samples made of clayey soil with 20% additives of sapropel on formation pressure and absolute humidity of samples. It has been established that density of dry samples increases when formation pressure is enhanced. Density of samples made of pure clayey soil increases more than of samples made of clayey soil and sapropel mixture. The dependence of heat conductivity in samples, formed at 26 – 40 MPa on absolute humidity, is linear, whereas, in samples, formed at less than 26 MPa, is nonlinear. The dependence of absorptive power on formation pressure belongs on the duration of samples keeping over water. Linear regressive analysis of investigation data has been fulfilled using a packet of statistical programmes SPSS-15. It is established that absolute humidity of samples and formation pressure are statistically significant (Sig.>0,001), and humidity of samples during measurements is more important to heat conductivity than formation pressure (Beta values are equal to 0,781 and -0,528 respectively).