Effect of the Molar Ratio of Liquid Glass Grouting Agents on Mechanical Characteristics of the Solidified Soils

Abstract

Chemical grouting techniques are used as ground improvement methods to obtain stable ground. In this method, soft sandy soils are solidified by injecting liquid solidification agents into the soils to prevent liquefaction as well as to increase strength. In this study, liquid glass grouting agents containing liquid glass with a higher polymerization degree (No. 5 liquid glass grouting agents) are being developed and discussed while focusing on the liquid agents to be used for chemical grouting techniques. Specifically, the solidification properties of No. 5 liquid glass grouting agents and the influence of the molar ratio of liquid glass to the strength and shrinkage characteristics of sand-gel and homo-gel are experimentally studied. As a result, the sand-gel made of No. 5 liquid glass grouting agents is superior in strength and has smaller shrinkage ratios after gelation, and therefore, is superior in soil improvement.

Penetration Behavior of Chemical Grouting Considering Ground Uncertainty

“…Since the chemical grouting method uses compact equipment, that can be carried around comparatively easily, and it can be completed in a short amount of time, it has been successfully applied for temporary construction (auxiliary construction method in underground construction) at many construction sites. In recent years, along with improvements in grouting technology, typified by the double-tube double packer construction method, and progress made in the development of grouting material, the application of chemical grouting has been expanding [3], [4], [5]. For example, as the performance of the grouting material has improved, there has been an increasing demand for its use in various fields not only as a temporary solution, as was the original purpose in the past, but also as a permanent solution, such as in countermeasures to liquefaction [5], [6].…”

“…In recent years, along with improvements in grouting technology, typified by the double-tube double packer construction method, and progress made in the development of grouting material, the application of chemical grouting has been expanding [3], [4], [5]. For example, as the performance of the grouting material has improved, there has been an increasing demand for its use in various fields not only as a temporary solution, as was the original purpose in the past, but also as a permanent solution, such as in countermeasures to liquefaction [5], [6]. However, if the grouting material is to be used as a more permanent solution, it must have long-term durability.…”