Variations of Strength, Resistivity and Thermal Parameters of Clay after High Temperature Treatment

Research output: Contribution to journalArticlepeer-review

  • Authors:
  • Qiang Sun
  • Weiqiang Zhang (Corresponding)
  • Yuliang Zhang
  • Lining Yang

Abstract

This paper reports the variations of strength, resistivity and thermal parameters of clay after high-temperature heating. Experiments were carried out to test the physical properties of clay heated at temperatures ranging from room temperature to 800°C in a furnace. The experiment results show that below 400°C the uniaxial compressive strength and resistivity change very little. However, above 400°C, both increase rapidly. At a temperature under 400°C, the thermal conductivity and specific heat capacity decrease significantly. The thermogravimetric analysis (TG) and differential scanning calorimeter (DSC) test indicate that a series of changes occur in kaolinite at temperatures from 400 to 600°C, which is considered the primary cause of the variation of physical and mechanical properties of clay under high temperatures.

Bibliographical metadata

Original languageEnglish
Pages (from-to)2077-2091
JournalActa Geophysica
DOIs
Publication statusPublished - 28 Dec 2016