Pearl Building Rating System - Estidama

SM-10: Recycled Materials
Intent To increase the demand for recycled materials to reduce the amount of waste going to
disposal.
Credit
Requirements
GENERAL
Demonstrate that recycled materials are used as follows. The credit points listed below
are cumulative.
Recycled Steel
� 1 Credit Point: For Steel-framed Buildings, at least 50% of all structural steel (by
weight) has a minimum of 25% post-consumer recycled content or is reused OR for
Concrete-framed Buildings, at least 80% of all reinforcing or stressing steel (by
weight) has a minimum of 90% post-consumer recycled content.
Cement Replacement
Demonstrate through either the use of supplementary cementing materials (SCMs)
(including fly ash, ground granulated blast furnace slag (GGBFS) and silica fumes) or the
increased use of aggregates or admixtures, that the project has reduced the overall
amount of Portland cement used and associated embodied greenhouse gas emissions as
per Table SM 10.1 below.
� 1 Credit Point: Concrete mixes with an embodied GHG as per table SM10.1, rows
B1, C1 and D1
� 2 Credit Points: Concrete mixes with an embodied GHG as per table SM10.1, rows
B2, C2 and D2
Row A
Row B1
Row B2
Table SM 10.1: Embodied Greenhouse Gas Emissions of Concrete
Strength
Grade 25 30 35 40 45 50 55 60
Type
Cast in
Embodied GHG
place
Cast in
162 192 218 240 259 277 292 307
place 121 144 163 179 194 206 218 229
Row C1 Precast 176 209 236 260 281 300 317 332
Row C2 Precast 149 176 199 220 237 253 268 281
Row D1 Stressed 183 217 245 270 292 312 329 345
Row D2 Stressed 162 192 218 240 259 277 292 307
Estidama
Credits
1 Credit
2 Credits
1 Credit
2 Credits
1 Credit
2 Credits
Recycled Aggregates
� 1 Credit Point: Demonstrate that at least 15% of all aggregates used on site (by
volume), in structural and non-structural applications are recycled.
� 2 Credit Points: Demonstrate that only recycled aggregates and/or aggregates from
industrial waste by-products are used as base, sub-base or backfill.
Other Materials
� 1 Credit Point: Demonstrate that any combination of materials with the following
characteristics constitute at least 10% of the Total Material Costs:
� minimum 30% post-consumer recycled content
� minimum of 80% post-industrial content
� 50% agricultural waste by-product
ADDITIONAL REQUIREMENT/CLARIFICATIONS
None
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 188 of 223