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LEED v5 BD+C/ID+C: Materials and Resources Public Comments

Benchmark GWP of Concrete >7200 psi (402)

The Benchmark GWP of Concrete >7200 psi (402) value is less than the value for 6000 psi (407) – the value should be higher – the higher the compressive strength the more cement is required resulting in a higher GWP. 

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Fri, 04/19/2024 - 15:11

Additionally, this benchmark stops at 7200, while ASTM standards for precast concrete pavers is a minimum of 8000 psi and some suppliers have higher internal standards ensuring the best qualitity, particularly where products are exposed to freeze-thaw conditions. Higher values should be added as benchmarks.
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Kai Starn
Senior Sustainability Consultant
Steven Winter Associates
LEEDuser Premium Member
9 thumbs up

Tue, 04/30/2024 - 15:58

The credit language should cite the source of the benchmark data for each material like CLF 2023 Baseline Report, NRMCA, or EC3. 

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