Abstract
Many investigations on permeability of ultrafine cement grout have been carried out in a view of phenomenal consideration with various soil properties for injection, mix proportions of grout, methods of construction and so on. There is little investigation of properties of ultrafine cement itself.
In this paper, some effects on the permeability characteristics of two kinds of ultrafine cement grout, which have different permeability with similar physical characteristics, are investigated by observation with scanning electron microscopy, measuring viscosity, zeta potential, particlesize distribution and rate of heat evolution.
The results of above experiments were shown as follows;
(1) The permeability of ultrafine cement grout was influenced by the growth of particles.
(2) Increase of viscosity and aggregation of particles reduced the permeability of ultra fine cement grout.
(3) The permeability of ultrafine cement grout with high dispersibility tended to be better than that with low dispersibility.
