Pore waters extracted from compacted bentonite subjected to simultaneous heating and hydration |
| |
| Institution: | 1. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, Xi''an Jiaotong University, Xi''an 710049, China |
| |
| Abstract: | A compacted clay block of montmorillonite clay has been simultaneously subjected to heating and hydration by parallel and opposite fronts, in order to determine the physico-chemical effects of the thermohydraulic process on the clay and on its pore water.The pore waters of the clay have been extracted at ambient temperature after the thermal-hydration treatment by a compaction at high pressure (60 MPa) technique. They have been analyzed, and the chemistry has been evaluated by using the speciation program EQ3NR. The movement of salts towards hot areas has been observed as a result of the thermo-hydraulic gradients, but it is conditioned by anionic retention processes, which mainly affect the mobility of SO42− anions. The distributrion of the exchangeable cations is modified by the thermal gradient. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
