孔隙溶液对高压实膨润土-砂混合物膨胀性及渗透性的影响试验  

Research on the effect of pore solutions on the expansibility and permeability of highly compacted bentonite-sand mixtures

作　　者：王玉平 王哲[1,3,4] 赵雨[1] 王振雨 易发成 吴亚东 Wang Yuping;Wang Zhe;Zhao Yu;Wang Zhenyu;Yi Facheng;Wu Yadong(School of Environment and Resources,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Division of International Applied Technology,Yibin College,Yibin Sichuan 644000,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei Anhui 230026,China;Key Discipline Laboratory of Nuclear Wastes and Environmental Safety,Mianyang Sichuan 621010,China;School of Computer Science and Engineering,Sichuan University of Light&Chemical Engineering,Yibin Sichuan 644000,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]宜宾学院国际应用技术学部,四川宜宾644000 [3]中国科学技术大学地球和空间科学学院,安徽合肥230026 [4]核废物与环境安全国防重点学科实验室,四川绵阳621010 [5]四川轻化工大学计算机科学与工程学院,四川宜宾644000

出　　处：《化工矿物与加工》2022年第5期33-38,共6页Industrial Minerals & Processing

基　　金：国家重点研发计划项目(2019YFC1803500,2019YFC1803504);国防科工局核设施退役及放射性废物治理科研项目(科工二司[2018]1521号);四川省科技厅重点研发项目(2018SZ0298);干热河谷特色生物资源开发四川省高校重点实验室开放基金项目(GR-2020-E-02,JDH-2019-E-01);四川省阿坝州应用技术研究与开发资金项目(20YYJSY0063);西南科技大学龙山人才科研计划项目(17LZX613,18LZX638)。

摘　　要：以高庙子(GMZ)钠基膨润土和石英砂混合物为原料,采用多功能膨胀-渗透仪进行不同干密度和不同孔隙溶液对试样膨胀性及渗透性的影响试验,结果表明:孔隙溶液饱和后,试样的膨胀力随干密度的增大而增大;干密度相同时,除了NaOH溶液外,其他孔隙溶液对试样的膨胀力均有强化作用,膨胀力先迅速增大至一个峰值,然后增速明显减小,随后再次升高,最终趋于稳定;干密度相同时,试样的渗透系数大小顺序为NaOH溶液> NaCl-Na_(2)SO_(4)溶液>模拟北山地下水>去离子水;孔隙溶液相同时,渗透系数随最大膨胀力和干密度的增大而减小。Using the mixture of Gaomiaozi(GMZ) sodium bentonite and quartz sand as raw material,the effects of expansibility and permeability of samples with different dry densities and different types of pore solution were tested by means of multifunctional expansibility-permeability instrument.The results show that when the pore solution was saturated,the expansibility of the sample increased with the increase of its dry density.With the same dry density,except for NaOH solution,the expansibility of the sample was intensified in presence of all other types of pore solutions,it increased rapidly to the summit then continued to rise at a low velocity,and later went up again,finally tended to be stable.With the same dry density,the descend order of hydraulic conductivity was from NaOH solution to NaCl & Na_(2)SO_(4) solution to man-made northern mountain water to deionized water.With the same type of pore solution,the hydraulic conductivity decreased with the increase of the maximum expansibility and dry density.

关 键 词：高压实膨润土-砂混合物 孔隙溶液 膨胀力 渗透系数 干密度 

分 类 号：TB332[一般工业技术—材料科学与工程]