Use of Powerbetter treatment processes, which focus on powder-based Mix-in-Place procedures, can provide the following typical benefits:
- The elimination of expensive offsite removal of unacceptable soils, leading to savings on disposal, and tipping costs, and also improvements in programming and environmental considerations
- Options for engineering greater soils strengths, providing alternatives to other foundation processes – e.g. piling, vibro-compaction, stone columns
- Engineering of subsoils for use in temporary haul roads, storage areas and stable working and piling platforms
- Engineering subsoils to replace the import of aggregates, avoiding the depletion of natural mineral resources, and eliminating unnecessary road traffic
- Providing alternative treatment solutions which will actively and significantly reduce the carbon footprint impact of the construction process
- Sealing and encapsulating soils containing high and unacceptable levels of contamination on brown field sites
- Increasing shear strength, stiffness and bearing capacity of treated soils.
- Permitting site works to be resumed at a far earlier stage after the cessation of inclement weather.
- Improving workability and compaction characteristics.
The Powerbetter treatment process is now widely recognised as an effective and efficient means of constructing pavements and foundations with significant savings in construction costs. A method for the improvement of subgrades is included within the Design Manual for Roads and Bridges [document HA74/07], and soils improvement techniques and processes have been widely used by Powerbetter on large construction and civil engineering contracts, on sites as varied as highway and motorway construction; airport runway and apron construction [at Heathrow, Gatwick, Stansted, Manchester, Glasgow and Dublin]; industrial, commercial, residential and retail developments; provision of alternative means of constructing bulk fills, cappings, subbases and cement-bound layers; and treatments of pollutants and contaminants in soils.
Soils can be engineered, not only to enhance their strength for use as general fill materials, but also as sub-base replacement, reducing significantly the quantity of imported sub-base hardcore required, whilst still offering CBR strengths to comply with specification. As a general rule, most soil conditions encountered can be modified or stabilised to achieve enhancement – typical soils treated include both cohesive and granular materials, chalks, glacial till, mudstones and silts.