A STUDY ON THE CHEMICAL AND PHYSICAL FACTORS INFLUENCING COMPRESSIVE STRENGTH OF GROUTING MATERIALS

초록

New type of tunnel driving method and tunnel aid method are not only in common use of subway constructions but also obtaining good results in Korea. Chemical groutings are one of the most popular methods for the ground improvement during tunneling. In this paper, a series of uniaxial compressive strength tests of grouting materials were carried out to examine the variation of compressive strength for homo-gel of grouting materials. It was observed that the compressive strength of Sodium Silicate-Cement Grouts varied depending upon mixing methods. The compressive strength of grouting materials increases with using Circulation-Grinding-Mixing Methods, and this trend is increasingly noticeable to a low molar ratio(calcium hydroxide/natrium oxide).