Cement Stabilisation Contractor Working | Nestle Works, Tutbury
Cement Stabilisation at Tutbury
In early January 2013 we were approached by O'Brien Contractors (who had been awarded the Civil Engineering sub-contract package by John Sisk & Sons) to tender for the Soil Stabilisation works on the Nestle Development in Tutbury.
The project was being undertaken to expand the existing Nestle works at Tutbury with the existing site material being Stabilised to be utilised on site.
What Was Done
Once we had been awarded the contract the first step was to carry out design testing to establish a mix design for the powder additions. Once this had been established works commenced on site.
The site required 4 different levels of Stabilisation, which included:
- Lime Modification to the Sub-Grade - with over 22,000 sq.m. being treated
- Lime Modification to the Bulk Fill - with over 8,500 cu.m. being treated
- Soil Stabilisation incorporating lime and cement to provide a Stabilised Capping Replacement with a CBR of 15% to the Building Areas - with over 15,000 sq.m. being treated
- Soil Stabilisation incorporating lime and cement to provide a Stabilised Non-Frost Susceptible Sub-Base Replacement with a CBR of 30% to the External Areas - with over 27,000 sq.m. being treated
During the works processing, 2 different types of powder application / mixing techniques were used, which were:
- Standard Operation - binder applied to the material using a Tractor Towed Streumaster Spreader and then incorporated using a Wirtgen Standard Mixer. This was used on the majority of the site areas which were not dust sensitive.
- Integrated Operation - binder applied and mixed using the same Wirtgen Integrated dust free machine, which was utilised on areas of the site which were dust sensitive. This works by binder being spread under an enclosed hood over the entire working width of the drum and then incorporated into the material immediately, therefore minimising dust creation.
The areas treated were then compacted, trimmed to tolerance and a K1-40 Bitumen Emulsion curing compound applied to surface areas. Onsite compliance testing was carried out and reported throughout the contractor by a UKAS Accredited independent laboratory.