GEOTECHNICAL ANNULAR GROUTING
Cellular lightweight concrete produced with foam liquid concentrates is an ideal solution for annular and tunnel backfill. The cellular concrete material is lightweight and highly flowable, allowing the material to completely fill annular space and to be easily pumped long distances at low pressures.
Using cellular concrete produced with the Aerix family of foam liquid concentrates is fitting for subgrade modification when existing soils are undesirable for construction. As an alternative to over excavating and replacing poor soils with better soil, a layer of cellular lightweight concrete placed over the poor soils will reduce vertical deadloads, and increase bearing capacity and stability with the addition of minimal weight. The layer of cellular concrete also reduces settlement potential, improves stability in seismic areas, and provides insulating qualities.
The lightweight material has a reduced potential to float the pipe or damage the liner for sliplining. Strength and density of the cellular concrete can be customized to meet project requirements, and the material has a shrinkage of less than 0.3%. Using cellular concrete to fill annular space can accommodate any diameter pipe, and installation is quick, easy, and environmentally safe.