ESEM STUDY OF OSMOTIC SWELLING OF BENTONITE FROM RADZIONKOW (POLAND)

被引：26

作者：

BAKER, JC

GRABOWSKAOLSZEWSKA, B

UWINS, PJR

机构：

[1] CSIRO,AUSTRALIAN PETR COOPERAT RES CTR,N RYDE,NSW 2113,AUSTRALIA

[2] CSIRO,DIV PETR RESOURCES,N RYDE,NSW 2113,AUSTRALIA

[3] UNIV WARSAW,FAC GEOL,INST HYDROGEOL & ENGN GEOL,PL-02089 WARSAW,POLAND

[4] UNIV QUEENSLAND,CTR MICROSCOPY & MICROANAL,BRISBANE,QLD 4072,AUSTRALIA

来源：

APPLIED CLAY SCIENCE | 1995年 / 9卷 / 06期

关键词：

D O I：

10.1016/0169-1317(95)00002-L

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Swelling tests using an environmental scanning electron microscope (ESEM) have been carried out on bentonite of Carboniferous age from the Radzionkow coal mine, Poland. The bentonite consists mostly of smectite in which sodium is the main exchangeable cation. ESEM test results revealed that in all samples osmotic swelling of constituent smectite in response to freshwater immersion led to significant microstructural reorganisation, similar to that recently recorded for freshwater-treated, smectitic clay in reservoir sandstones. Freshwater exposure caused the bentonite to become significantly less compact and more (micro)porous due to osmotic swelling of constituent smectite.

引用

页码：465 / 469

页数：5