CASE STUDY 1: |
Commercial Development at Petersfield |
Project Description:
Construction of three 2 storey commercial units of area 500 sq m each as well as all associated car parking and infrastructure works.
Existing Ground Conditions:
Slightly Silty Sandy Clay with an in-situ CBR of 1%.
Product 1: Road Foundation:
A low grade fill (Enviro-Fill) was produced from the existing site won clay material to achieve a CBR of 5%. The depth of the fill varied from 0 to 1m. Lime alone was used as the binder material.
A Capping Layer material (Enviro-Cap) was produced as a road foundation under the main access roads and the car parking areas. Again lime only mix was required for this application.
The Clause 803 Sub-base was replaced by site won clays through stabilisation using lime and cement as binders with CBR results in excess of 35% in all cases.
Product 2: Ground Floor Slab Foundation:
The floors originally proposed were wide slab planks. It was not possible to procure these pre-cast units for 18 weeks. The desired project completion date for works to slab level was 18 weeks from commencement.
As a result steps were taken to re-engineer this element of the works. Block and Beam pcc slabs were examined but could not work at some of the spans involved, unless approximately 20 additional linear metres of concrete foundation and blockwork was incorporated.
Eventually, Envirosoil made the proposal to the Sructural Engineer that the ground could be improved by stabilisation and a ground bearing slab solution employed.
The Engineer designed a lightly reinforced slab with thickenings and managed to eliminate all of the 2 metre deep internal foundation concrete and blockwork. The slab was supported on 30% CBR stabilised material (Enviro-Base) using lime and cement as binders, on a 5% stabilised material (Enviro-Fill).
Benefits Accrued as a direct result of the incorporation of Envirosoil Products in the Works:
- £25 per square metre saving on building floor area of 1500 sq m which was equivalent in percentage terms to 45%
- £7.50 per sq m saving over hard-standing areas of area 2000 sq m, which approximates a 58% saving over traditional methods
- Lorry movements reduced by 1200 which was of assistance because of the proximity of the site to a mainline railway corridor and motorway.
- No importation of quarried stone materials, which reduced disruption throughout a heavily trafficked industrial estate.
- Assured quality as a result of Envirosoil’s strict and independent testing regime.
- Reduction in risks to Health and Safety of General Public and Site Operatives as a result of the elimination of unnecessary delivery traffic.
Reference: Howard Brindley, Howard Brindley Partnership, 01794-517667
CASE STUDY 1: |
Commercial Development at Petersfield |
Project Description:
Construction of three 2 storey commercial units of area 500 sq m each as well as all associated car parking and infrastructure works.
Existing Ground Conditions:
Slightly Silty Sandy Clay with an in-situ CBR of 1%.
Product 1: Road Foundation:
A low grade fill (Enviro-Fill) was produced from the existing site won clay material to achieve a CBR of 5%. The depth of the fill varied from 0 to 1m. Lime alone was used as the binder material.
A Capping Layer material (Enviro-Cap) was produced as a road foundation under the main access roads and the car parking areas. Again lime only mix was required for this application.
The Clause 803 Sub-base was replaced by site won clays through stabilisation using lime and cement as binders with CBR results in excess of 35% in all cases.
Product 2: Ground Floor Slab Foundation:
The floors originally proposed were wide slab planks. It was not possible to procure these pre-cast units for 18 weeks. The desired project completion date for works to slab level was 18 weeks from commencement.
As a result steps were taken to re-engineer this element of the works. Block and Beam pcc slabs were examined but could not work at some of the spans involved, unless approximately 20 additional linear metres of concrete foundation and blockwork was incorporated.
Eventually, Envirosoil made the proposal to the Sructural Engineer that the ground could be improved by stabilisation and a ground bearing slab solution employed.
The Engineer designed a lightly reinforced slab with thickenings and managed to eliminate all of the 2 metre deep internal foundation concrete and blockwork. The slab was supported on 30% CBR stabilised material (Enviro-Base) using lime and cement as binders, on a 5% stabilised material (Enviro-Fill).
Benefits Accrued as a direct result of the incorporation of Envirosoil Products in the Works:
- £25 per square metre saving on building floor area of 1500 sq m which was equivalent in percentage terms to 45%
- £7.50 per sq m saving over hard-standing areas of area 2000 sq m, which approximates a 58% saving over traditional methods
- Lorry movements reduced by 1200 which was of assistance because of the proximity of the site to a mainline railway corridor and motorway.
- No importation of quarried stone materials, which reduced disruption throughout a heavily trafficked industrial estate.
- Assured quality as a result of Envirosoil’s strict and independent testing regime.
- Reduction in risks to Health and Safety of General Public and Site Operatives as a result of the elimination of unnecessary delivery traffic.
Reference: Howard Brindley, Howard Brindley Partnership, 01794-517667
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