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| Summary of recycled content in the York ¾«¶«Ó°ÊÓ | ||
| Whole building | Materials value (£) | Recycled content by |
| Structure | 1,719,892 | 32.95% |
| Shell | 2,382,061 | 22.39% |
| Finishes | 823,122 | 7.46% |
| Services | 3,949,076 | 20.00% |
| Whole building | 9,822,160 | 20.84% |
| Sub and superstructure | Shell | Finishes |
| Foundations: Piles, retaining walls, basement slab | Glazing/louvres Reconstituted stone columns/cornices | Offices: Raised flooring/carpets; false ceiling; partitions; core finishes |
| Structure, above ground: Columns, beams, slabs, staircases | Facade–roof connection | Residential: Flooring; ceiling; partitions; core finishes |
| (All are concrete elements) | Ìý | Roof finishes |
| Potential for increasing recycled content in the York ¾«¶«Ó°ÊÓ | ||||
| Materials value of recycled content | ||||
| Total material cost (£) | As-built (£) | Standard (£) | Good (£) | Best (£) |
| 9,822,160 | 2,047,363 | 2,026,497 | 2,356,549 | 2,809,863 |
| Percentage recycled content | 20.84% | 20.63% | 23.99% | 28.61% |
| Options for cement replacement and their implications for recycled content | |||
| Ìý | Standard level | York ¾«¶«Ó°ÊÓ level | Additional potential increase |
| Cement replacement | 100% Portland cement | 25% GGBS | 50% GGBS |
| Columns | 44% | 46% | 48% |
| Beams (downstand) | 49% | 51% | 52% |
| Upper slabs | 32% | 34% | 37% |
| Piles | 100% Portland Cement | 30% PFA | 70% GGBS |
| Ìý | 27% | 31% | 36% |
| % increase (whole building) | 0% | 0.25% | 0.45% |
| Cost difference: Use of cement replacement is usually cost neutral or cheaper than 100% Portland Cement concretes. However, in very high concentrations there can be a small cost premium | |||
| Options for increasing recycled content in the shell elements | ||||||
| Ìý | York building | Higher recycled content products | Ìý | Ìý | ||
| Element | Specification | Recycled content | Specification | Recycled content | % Increase | Impact |
| Roof-facade connection – coverings | Zinc coverings | 31% | Aluminium coverings | 73% | 0.15% | Aluminium has a different colour and more difficult installation |
| Roof paviors | Pre-cast concrete paviors | 0% | Pre-cast concrete paviors | 70% | 0.40% | A negligible additional cost might be incurred |
| Flat roof insulation | Extruded polystyrene | 0% | Expanded polystyrene | 20% | 0.10% | EPS is expected to have similar performance to XPS |
| Total % increase for shell elements - 0.65% | ||||||
| Options for increasing recycled content in internal finishes | ||||||
| Ìý | York building | Higher recycled content products | Ìý | Ìý | ||
| Element | Specification | Recycled content | Specification | Recycled content | % Increase | Impact |
| Suspended Ceiling | Galvanised steel suspended ceiling | 3% | Mineral fibre ceiling tiles | 75% | 0.60% | Slight variation in thermal and acoustic performance |
| Raised Floor | Galvanised steel raised floor | 15% | Calcium sulphate raised floor | 95% | 1.40% | Similar to other systems but heavier |
| Floor Carpets | Generic floor carpets | 0% | Recycled nylon and rubber | 86% | 1.10% | Carpets with high recycled content maintain same properties |
| Plasterboard finish | Generic gypsum plasterboard | 36% | High recycled content gypsum board | 84% | 0.60% | High recycled content plasterboard maintains same properties |
| Total % increase for internal finishes - 3.7% | ||||||
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