| 摘要 |
<P>PROBLEM TO BE SOLVED: To measure the concentration of water glass with high precision with respect to a non-alkaline water glass type injection material (A+B) using a strong acid as a reaction material injected in the ground G even if a component B other than water glass is added. <P>SOLUTION: In injecting the non-alkaline water glass type injection material (A+B) into the ground G using the strong acid as the reaction material, the concentration of water glass of the injection material (A+B) is measured on-line. Concretely, the electroconductivity and pH of the injection material (A+B) are measured on-line and the concentration of water glass of the injection material (A+B) is calculated from the measured values and the relation between the predetermined concentration of the injection material, electroconductivity and pH. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
