Looking for lessons learned on 1) Cross Laminated Timber and/or 2) Carbon Cure concrete

Our structural team is currently investigating Carbon Cure. We spoke with our local ready mix company and they said of the approx. 4,000 lbs a yard of concrete weighs, roughly 500 lbs is cement. Of that, they can displace 26 lbs through injecting CO2 into the mix while on the truck. Carbon Cure is a patented process of injecting the CO2, rather than an admixture or additional ingredients (other than CO2). The CO2 here in Chicagoland is sourced from a fertilizer plant in WI. It is captured, cleaned, then locked into the concrete, thus avoiding the emissions at the fertilizer plant. The mix company says it is frequently cost neutral, but may carry a 2-3% premium depending (I think they are feeling out how much the market will pay for it so they can properly price it and make money, even if it is cost neutral/negative for them). They also say it is stronger than conventional concrete because of how the CO2 binds in the mix – our team hopes to figure that big out. I hope that helps! John M F

woodworks.org has some great information on CLT.  They are also great to talk with if you have specific questions.  If they don't know the answer they can usually point you in the right direction. We looked into Carbon Cure for a project in the Puget Sound region but to get the plant set up and installed out here was cost prohibitive. 

Hey Jennifer, DPR recently completed construction on our new Sacramento, CA office, which used CLT heavily.The project included CLT roof and wall panels, and glulam columns and beams. Additionally, this was the first building in CA to use CLT shear walls.   I wasn't on the project team, but might be able to get you in touch with someone who was.   https://www.bdcnetwork.com/timber-grows   https://archpaper.com/2020/02/2020-us-woodworks-wood-design-awards-category-winners/

We’re currently working on a couple projects with CLT in the SF/Bay Area, at the moment the one I can mention, and construction is underway, is One De Haro https://sksre.com/project/one-de-haro/, our supplier is Nordic Wood https://www.nordic.ca/en/sustainable-construction/certifications. I also recommend https://www.thinkwood.com/ for excellent education and info. Central Concrete in the Bay Area use Carbon Cure and we’ve been using their mixes quite a bit, they’ve been successful, and engineers have been happy with the strength and performance. They also issue specific EPDs on demand. Jessie Buckmaster, LEED AP® BD+C Sustainability Manager [HDCCo Logo] Office: 213.634.2796 Cell: 213.435.4191 buckmasterj@hdcco.com From: