Portland’s thresholds set limits on the embodied carbon that may be in concrete mixes used on city projects. The city has adopted a scale keyed to the concrete strength needed from the mix, and has created both a list of preapproved concrete mix designs and an avenue for submitting documentation to approve a mix not on the preapproved list. The requirements went into effect January 1, 2023.
Policy Details:
Locale: Portland , Oregon [West]
Climate zone: Zone 4C: Mixed Marine
Jurisdiction: Municipality [>150K]
Smart Surface(s): Zero and Low-Carbon Concrete
