矽酸鈉為應用於土壤改良常見之化學漿液，應用於電滲透化學改良工法時，受限於漿液本身性質，改良範圍侷限於接近正極區域。本研究之目的為透過調整矽酸鈉本身酸鹼性質，藉由室內電滲透實驗，使粉土質砂達到擴散漿液範圍、改良區域增加的成效。實驗主要可分為四部分: (1)透過強酸溶液將原始性質為鹼性的矽酸鈉調整成酸性溶液，觀察並選擇適合應用於電滲透之漿液濃度。(2)當漿液pH值控制於2~3之間時， pH值變化對膠結時間具有極大影響，此部分實驗選用pH值為3、2.6、2.2之酸性矽酸鈉漿液，測試其灌入成效。(3)透過加入固定水頭差於整體實驗配置中，觀察是否對電滲效果有所提升。(4)透過提升漿液中金屬離子含量，觀察是否對電滲效果有所提升。實驗結果表示:酸性矽酸鈉在砂質土壤中之電滲灌入效果不佳。加入水頭差後產生漿液滲流現象，對灌入成效無顯著提升。提升灌入漿液中金屬離子含量後，對灌入成效具有提升效果。

Sodium silicate is a common chemical solution used in soil improvement. limited by the nature of the solution, the improvement area of the electro-osmosis treatment is limited to the positive electrode area. The purpose of this study is to adjust the properties of sodium silicate, so that the silt sand can increasing the improvement area. Four phases were adopted in this study: (1) Adjust the sodium silicate into an acidic solution through an acid solution, observe and select the concentration suitable for electroosmosis. (2) When the pH value of the solution is controlled between 2 and 3, the change of pH value has a great influence on the cementation time. In this part of the test, the acidic sodium silicate solution with the pH value of 3, 2.6, and 2.2 is selected. (3) By adding the water head to the overall experimental configuration, observe the efficiency of the ECT. (4) By increasing the content of metal ions in the solution, observe whether the effect of electroosmosis is improved. The test results show that the electroosmotic irrigation effect of acidic sodium silicate in sandy soil is not good. After adding the water head, the slurry seepage phenomenon will occur, which has no increase effect on infusion volume. After increasing the content of metal ions in the pouring slurry, it has a significant effect on the injection volume of pouring.

1. ASTM D2216-98, 2017, “Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass”, ASTM International, West Conshohocken, PA, U.S.A.
2. ASTM D5778-20, 2020, “Standard Test Method for Performing Electronic Friction Cone and Piezocone Penetration Testing of Soils”, ASTM International, West Conshohocken, PA, U.S.A.
3. ASTM D4972-19, 2019, “Standard Test Methods for pH of Soils”, ASTM International, West Conshohocken, PA, U.S.A.
4. ASTM D1193-06, 2018, “Standard Specification for Reagent water”, ASTM International, West Conshohocken, PA, U.S.A.
5. Brown, M.A., Bossa, G.V., May, S., 2015, “Emergence of a Stern Layer from the Incorporation of Hydration Interactions into the Gouy-Chapman Model of the Electrical Double Layer”, Langmuir 31, 11477-11483.
6. Esrig, M.I., 1968, “Pore pressure, consolidation, and electro-kinetics, ” Journal of the Soil Mechanics and Foundation Engineering Division”, ASCE, Vol.94, pp.899-921.
7. Huang, A.B., Lin, Z.P., Ji, Y.Y., Gu, Z.S., 2005, “Cyclic behavior analysis of the silty fine sand in central western”, Taiwan .Sino-Geotechnics 103.
8. Hung, J.L., Chen, Y.X., Ricky K. N., Wong, S.W., 2020, “Study on the application of colloidal silica in soil grouting”, Proceedings of the 18th Conference on Current Researches in Geotechnical Engineering in Taiwan.
9. Iler, R.K., 1979. “The chemistry of Silica: Solubility, Polymerization, Colloid and Surface Properties, and Biochemistry”, Wiley Interscience, New York.
10. Karol, R.H., 1982, “Chemical Grouts and their Properties”, Symposium on Grouting in Geotechnical Engineering, ASCE, pp. 360~375.
11. Lai, C.H., 2021. “A Feasibility Study of the Extension of the Improvement Area for the Double-Packer Grouting Method through Electrokinetic Chemical Treatment, ” MS Thesis, National Taiwan University of Science and Technology.
12. Mitchell, J.K., 1993, “Fundamentals of Soil Behavior”, 2nd ed., John Wiley & Sons Inc., New York.
13. 薛宇廷，2015，「提升卜作嵐反應及水玻璃灌漿之效率於ECT全面改良之探討」，碩士論文，國立台灣科技大學營建工程系。
14. 尤士明，2009，「電滲透化學改良應用於砂質土壤之硏究」，碩士論文，國立台灣科技大學營建工程系。
15. 李宗燁，2010，「電滲透化學灌漿工對高嶺土改良強度最佳化之研究」，碩士論文，國立台灣科技大學營建工程系。