激光击穿光谱技术监测固土过程中阳离子交换

Cation Exchange Detection in the Process of Reinforcing Soil by Laser-Induced Breakdown Spectroscopy

为了实时探测离子土固化剂(ISS)在固土过程中的阳离子交换量(CEC),采用激光击穿光谱技术(LIBS),对ISS处理后的土壤溶液中的K、Ca、Na、Mg、Al、Si这6种离子含量进行探测。分别对由不同配比(1∶100、1∶200和1∶300)的ISS处理过的高岭土、膨胀土、红粘土等5种标准土壤进行了研究,结果表明:同一土壤中的各种离子随ISS配比的变化趋势各不相同;不同土壤与ISS作用的效果各不相同;ISS的配比并非越高越好。这些工作为ISS固化机理的研究提供实验依据,而利用激光击穿光谱技术进行探测的方式为ISS固化机理的研究提供了新的思路。

In order to detect the cation exchange capacity（CEC）in the process of ionic soil stabilizer（1SS） reintorcing soil m real time, the content of ions K, Ca, Na, Mg, A1, Si in the soil solutions treated by ISS are obtained with using laser in- duced breakdown spectroscopy （LIBS）. Kaolin, expansive soil, red clay and so on, 5 kinds of standard soil treated by differ- ent ratio（l： 100,1： 200, 1： 300） of ISS are studied. The results show that for the same soil, different ions trend vary with ISS ratio changing. For different soil, the reinforcing situation are different. ISS ratio is not the higher the better. These studies provide the experimental basis for ISS reinforcing mechanism research, and the method detecting the cation exchange by laser-induced breakdown spectroscopy provides a new idea for ISS reinforcing mechanism study.