Abstract
In late years, environmental protection is regarded as an important issue in a field of the ground improvement by the chemical grout permeation. As the part, the authors push forward the study of a new grout (We call it biogrout as follows) which used microbial metabolism and silica colloid. In this issue, we hereby report that we have developed a new grout which has almost same gel time and strength as those of a conventional grout by using silica compound and microbe even if volume of an agent for pH adjustment in grout is comparatively less.
